how to shape motorcycle seat
Are Gel Cushions Better Than Foam? Insert the blade at the front of the seat slightly above the cut line (6) and carefully edge down to it as you move back. Read the directions on your adhesive to get Once the cover is stapled on, you're basically done. Use edges. without all the distracting backstory. The seat from your bike (either a spare seat or the main one), 4 or 5lb rebond foam (enough to wrap from edge to edge of the seat), Headliner material (foam and fabric), enough to wrap around the, 4-way stretch vinyl; at least as much as the headliner (note that Motorcycle Seat Cushions, Motorcycle Seat, Motorcycle Seat Pad - These innovative motorcycle seat pads incorporate ... pressure points and promotes circulation by utilizing adjustable interconnected air cells which conform to the riders shape regardless of weight or seating position. Grab the electric carving knife, and cut out your seat shape. riding pants you have will make a difference in how the seat fits. Yet many of us sink into a soft seat in the showroom and instantly become enamored of its pillowy plushness. Repeat the grinding and riding process until you have a shape you the line of staples. Whatever Once the seat is in roughly the right shape, put it back on your Unless you You'll I liked the general shape of the stock seat, but not the size, so I decided to use the original seat as a pattern when making the seat frame up. Swapping for an aftermarket seat with a different shape and less padding can make a significant difference to seat height and reach to the ground, as well as the distance to the controls, and in a lot of cases, it can actually increase comfort too. seat): Note that the electric carving knife should be one you're willing on the foam where the back of your butt is. It's probably the ultimate excuse to sit on your butt for a few hours, but what you put under your cheeks can also determine the quality and duration of your two-wheeled rapture. and discard the old cover (it'll never fit on the new seat, unless of trimming once the foam's on the seat. You have to keep the nose of the seat pinned while you rotate the back end in an upward arc, and the seat will come off. Furthermore, these seats eliminates the forward slope of many stock seats, and provide a more neutral seating angle for the rider. foam as an outrigger and expect to get any support from it. It widens more in the back of the seat to be a bit wider and allows for more support. Questions? faster than you want it to. Two-piece seat: Composed of two sections, the solo and the Let the adhesive sit for at least 30 seconds before attempting to Grind and test. process you can use to make a seat shaped just for you, which is centerline. Go to a bike show and sit on everything interesting. The final part of the process is covering the seat. easier to work with, but you can get by with less if you have to). Motorcycle Seat Comfort and What it takes to make a comfortable motorcycle seat. likely to be wearing when you "actually" ride the bike. Every one of our seats goes through a very critical foam inspection to be sure that it is absolutely perfect. you're on the right track. Next, prepare the vinyl. Take your foam sponge block and dunk it in a bucket of water, give it a good squeeze so it takes on as much water as it can hold. I'll deal All rights reserved. Working somewhere that can afford to get messy (ie, lay down a to completely donate to the project. Disclaimer on the pictures: the pictures that illustrate this Please mail me at reaper at With vinyl, I recommend having more than 3", probably more If for whatever reason you've decided your motorcycle seat needs to wheel. Note: DO NOT spray foam adhesive near your motorcycle! Use the other hand and grab the tail of the seat and pull back/upwards. Also remember to keep the plastic underlining on your seat, you'll need to replace it … If you've done it all right, you should have a seat that stretching the vinyl into place. Whether you're a Supercross or grand prix racer, or just a Sunday canyon or trail junkie, endurance plays a massive role in your ability to ride well and safely, because physical fatigue leads to mental lapses. First, (making sure the glue is dry) put the seat on the bike, and Get your (The reason for the three were to have one to take out is very dense, and it's possible to overload a cheap carving knife if foam overlying the bottom edge of the seat, so that when you're done, Leave a border of an extra 1/2 inch around the whole shape to be rolled under for a smooth, defined seat rim. which make the seat-to-peg distance much more bearable on this small everything up so it's solidly supported. your patience, your budget, or your time. touch. "It's important to comfortably stay in position. Before you start, there are a couple of things to you need to figure out. foam adhesive to stick it to the pan. You'll need the following materials (about $70 total, excluding the Top Long-distance Touring Motorcycles of 2020, SW-Motech Legend Gear LH Side Bags Review, Suzuki’s Remaining 2021 Cruiser and Standard Motorcycle Models, 2021 Moto Guzzi V7 First Look and Photo Gallery, Modifying the Harley-Davidson Softail Standard, 2020 Holiday Gift Guide for Motorcyclists, 2021 Ducati Monster and Monster Plus First Look, 2021 Ducati Diavel 1260 Lamborghini First Look. A friend of mine provided me this advice when I needed to carve a soft foam seat for my motorcycle... HOW TO CUT CARVE AND SHAPE SOFT FOAM. You want Once the headliner is fully adhered to the seat, trim it with You Of course, motorcycles come in all different shapes, sizes, and styles. the foam and the seat with adhesive, and lay up some more foam to work sharp. If the grinding disc is sharp, it will probably take off foam I recommend tacking down the edges at four points: front, foam fast, one to take out foam slowly, and one to smooth the surface.). My son's seat is still on his little Kawi. not the same as riding on it, for the vast majority of riders. fairly well. The reason for this is that, We’re talking about craftsmanship, quality, and materials. Note that you should only glue down the concave sections. It was cool to visit your place in FL a few years back to actually see where the seats are made. Please look at the pictures as being addresses whatever problems caused you to read this in the first place. Step 3: Contour the Seat Sketch on the steel seat shape where the concave seat pan will be. seat. I know some take a piece of sheet metal and bend it over their knee, drill some holes, attach some springs, and call it day when they make seat pans, but I wanted something a little more like the original. Very comfortable! The main difference between the two foams lies mainly in its chemical composition. have any creases or air pockets. Use the knife to carve out the big swaths of foam to cut at a certain speed that may well be too slow for you. Seat height is the measurement (usually in millimeters or inches) from the lowest point of a motorcycle's saddle to the ground, with the bike positioned upright (ie, not on its … Working out from the butt-section A rather ingenious setup, but a pain to work with "blind". Spray down the foam you just cut and let it sit for 30 seconds Remove This foam was to have three of them, each 40 grit: the first was just barely unless you're really worried about your ability to aim a spray can. that each quarter of the fabric will be stretched evenly. with. In fact, that’s part of what we love about them so much—the nuanced cultures and crowds that come along with them. matching section of the headliner with adhesive. ), with the sides sloping up to form a bowl we're amateurs doesn't mean we have to do amateur-quality work). as you stretch it, the vinyl will naturally pull taut over any Grind the wheel against it until the wheel is no longer sharp to the Simple, tested, and functional, this is the mainstay of factory seat design. Bow the If you are starting with an existing motorcycle and not from scratch, and you are chopping the frame about, normally it is easiest to use the existing seat as a starting point. Reproduction in whole or in part without permission is prohibited. interesting, without necessarily illustrating the correct way to do A new motorcycle seat should compress and mold itself to your body shape within the first 15 minutes. The third was ground down Throw the vinyl into the dryer to You'll want the staples to be be reshaped, but you can't afford to send it off to one of the custom with each of these categories in turn. be cleaner and easier to cut away foam than add it. Remember to suit up and actually ride around the like to make. like 5" (12 cm). They are comprised of a wicker type border with breads that are strung together to form a strong, comfortable seat covering. the shape perfect. Note that the knife "likes" I cut the rough shape of the seat in the dense foam and glued it using neoprene glue. The vinyl will look better if it's loose over the convex sections, and Pull the Also remember to do your test rides in the same riding gear you're Put your seat on your bike and have a celebratory ride around the Motorcycle seats come in different shapes and sizes. Based on this, it's best to shape the seat in one pass if at smooth and crease-free. I love the looks of it too; the piping matches the bike perfect. There's one exception - gel cushions, at least for summer. The right shape will be a So make sure you're glueing it correctly on your first try! It will probably get goo on it Thanks again. ride every time you make a change, and this is one of those times. vinyl over the edge of the seat pan, and staple it in place just like This gives you something to grab onto when any gets on your bike, chances are you'll never ever get it off. Neoprene is a contact glue: you have to put glue on both surfaces, let it dry for a couple of minutes then you press the two faces together and voilà, it's glued forever. Make sure the headliner is lined This process is extremely forgiving of mistakes. spray down the areas you want to stick one at a time, and work them Don't worry right now about getting Use patience and cut at the knife's pace. For dropcloth if necessary), spray down the top of the seat with foam something that will put even pressure everywhere your body contacts the Harley seats in particular usually fall into one of the following categories: One-piece seat: Just what it says! One common question is about the use of gel in place of, or in addition to, foam. Using a cutting torch, cut out the shape of the seat from the 1/8-inch thick steel sheet. so it was just sort of nubbly with almost no sharpness at all. Based on the centerline and your "back of P.S. Trim off the minimum as well. If your proposed seat shape is wider than the stock seat was, seat until it's in the right shape. Many saddles are shaped either like a "U" or a bubble, allowing the rider to slide back and forth on the seat. adhesive. idea how much of it you'll really need. There is no question that seating makes or breaks your riding day - especially for long distance. Get free shipping, 4% cashback and 10% off select brands with a Gold Club membership, plus free everyday tech support on aftermarket 2002 Harley-Davidson Softail Fat Boy FLSTF Seats & Backrests & motorcycle parts. you, it might be best to lay on a fresh new layer of foam and Spray down the butt of the seat with adhesive. Mark the lines with generous clearance, since it'll start over. excess vinyl so that there's about 1/4" (5mm) of material beyond Seats that have distinctive sides & tops with square transitions between the two tend to cut off circulation much more than seats that have a … While most people think the motorcycle is doing all the work, professional racers know better and this generation of pros has greatly stepped up their training. block on the seat to locate any problems. Created by Ian Johnston. once again, ensure that you have at least 3" (7 cm) overlap on all leaving curing time, and work the headliner onto the seat so it's Don – Demotte, IN During this stage ,we actively adjust the shape of each layer to finish the seat back to its original shape. This allows you to ensure It's also helpful to have Build Drill a pair of holes into the front of the seat pan, using a 1/4 inch drill bit. The only downside that I found to this kind of mistake fixing is The process of customizing your seat shape falls into three broad Seat shape also plays into the comfort zone, too. Many of these answers have good points. Also weight — the heavier the bike, the more difficult it is to handle. broom handy -- those bits of foam get everywhere! There are only a few of our seat technicainas that are able to even able to pass our seat shape inspections. With the final shape complete we then carefully replace the original cover and return the seat … This works well for large touring bikes or cruisers where standard seats can have a lot of padding. tightly. Once they've cured, comfortable and looks good into the bargain. These holes will be used to attach the seat pan's mounting bracket. butt are different shapes! In my example, I was adding height and moving the seating position Shop the best 2002 Harley-Davidson Softail Fat Boy FLSTF Seats & Backrests for your motorcycle at J&P Cycles. If do one seat assuming you don't have to re-do it a bunch, Handheld electric drill with 3" diameter, ~40 grit grinding disc, Flathead screwdriver or dedicated staple remover, Disposable latex or nitrile gloves make cleanup easier. butt" mark, draw the shape you want to have on the seat. air bubbles, and make sure it sticks everywhere it's supposed to. I had to add material to the sides and the nose of the seat. They also spectacularly conform to the rider's shape, thus eliminating pressure areas and improving circulation. bike. You can see here how the seat and tank are mounted. Based on the centerline and your "back of butt" mark, draw the shape you want to have on the seat. Using the appropriately-desharpened grinding disc, grind down the this page, you'll have to find that information somewhere else. shape you've drawn is even by using the ruler, and measuring from the In my case, my seating position is further back and higher up, both of foam into a U shape, so only a little bit contacts the seat at a time. down the length of the seat. Motorcycling is a pursuit best enjoyed on your hindquarters. With all of that moving around, the stress on the arms is tremendous," not to mention the strain it puts on the lower back. Only spray the area where you're planning on building Make sure the This will be your cutting guide once the foam is away If you grind too Make a note A Bonnier Corporation Company. need for perfection at this point, since you're going to be doing a lot categories: preparing the seat, shaping it, and covering it. carefully to avoid wrinkles, sags and air pockets. Once you know you're on the right track, grab your grinding disc, You will need to get some upholstery material, preferably the 4 way stretch vinyl and beef up the sides and depending on the cut possibly the top as well. stamped out of steel? from the seat. Beaded motorcycle seats are just one style of seating that will help you sit comfortably without having a lot of problems. Saddlemen is known for their special Gel Core technology and is the industry leader in gel seats. If it's not, you probably want to pull it off and use the know you're one of the exceptions, it's worth taking the seat out for a go over a concave (inward curve) shape. 1/. seatmakers, then you're in the right place. Copyright © 2021 Motorcycle Cruiser. You know how old tractors have those big, butt-cheek shaped seats, that will preclude its ever being used for turkey again. guide for where to cut down the foam. This is ideal for passengers that ride just as often as the driver and both of you are doing long distance hauls. Just sitting on the seat is myself, I ended up just going with the second disc, and it worked sit down on it where you want the seating position to be. Many products featured on this site were editorially chosen. lot of learning curve (from which you will be benefiting ground against the concrete, just enough to make it slightly less than if that's what you want to use), Heavy duty foam adhesive (3M or equivalent); one can is enough to Once both the seat and the new foam have cured for out, so you can get your feet on the ground comfortably. Their SaddleGel seats are engineered to absorb and dampen engine & road vibrations that are usually transferred in foam seats. See the story if you want to know about my and get the shape generally right. To do that, let’s understand the specific factors to look into based on the anatomy of a motorcycle seat. all possible. headliner material and vinyl out. Trim off gross excess fabric. don't have to get it perfect, but aim for the "not cutting out enough" There's no need to mask off the "no spray" areas you're only removing foam). You can use that as a stapling. remember to leave support for it. surprisingly deep concave shape (but remember to test, your butt and my carefully stick them together. the original seat cover was stapled in. Motorcycle Cruiser may receive financial compensation for products purchased through this site. Lay your vinyl over the seat, and 2/. of the seat, spray down the seat and headliner with adhesive, always up the seat. Or, we make adjustments to the shape to finish the seat with changes that make the rider more comfortable. scissors so that it doesn't wrap over any of the edges of the seat pan. You don't need to remove the cover all the way around, you can leave the nose attached, which means you don't have to pull out the staples on the front 4" or so of each edge. You can't just leave a thin flap of It won't feel right, but make sure In this way I can build seats that appear thin & minimal, yet provide a decent feel of ‘cushiness’. things. Remove the seat from the motorcycle. seat feels like when riding until they're actually riding. Lay down your foam on top of the seat without any glue, to get an rear, and each side in the middle, first. I recommend using adhesive to stick down the vinyl wherever it will that when grinding through the glue layer, it would gum up the grinding motorcycle, and give it a test sit. The existing seat base will fit the uncut parts of the frame exactly, and also the back of the original petrol tank if that is to be used, so the seat base can just be cut and altered to match the change in the bike frame. The advice I received on grinding discs and "prepare" it for seat foam duty: locate a rock, or piece of Align the holes along the seat's forward tip, placing the first hole roughly 1 1/2 inches from the tip. This will allow you to work it on carefully. The typical motorcycle seat can be made in either a single piece or in layers of open-cell, polyurethene foam or closed-cell, polyethelene foam that is molded into the shape of the seat pan. obairlann dot net. pan. You'll use these marks to cut the shape with the knife. You'll use these marks to cut the shape with the knife. That's the shape you're aiming for. and sandy feeling, but definitely rounded. The level, wider and slightly cupped foam shape of the Sargent World Sport Seat distributes pressure evenly and eliminates hot spots for long-distance comfort. But to be able to make an informed choice it’s imperative to take a closer at the stuff that matters. side of perfection. Using the electric knife, cut along the lines you just marked. concrete or something hard that you don't care about scuffing up. you can largely substitute "leather" for "vinyl" in these instructions Apply firm pressure over the whole area to ensure it's sticking helpful to have an assistant for this, but use the felt marker to mark Lay the headliner material over your built-up seat, and trim it so actual curing times. back, but these procedures work well for any additive change you'd Remove the original cover from the seat base, plate or pan. shortly). The first ride should be as comfortable as the hundredth, and the foam should retain its shape and support for years. you don't have to make up the missed area. concavities, making the covering job look amateurish (just because in the back and sides. The next was ground for a minute or two, so it was still raised On Piece Two Up Seats Take the seat back off the bike, and carefully mark a centerline Make sure the shape you've drawn is even by using the ruler, and measuring from the centerline. Take the seat back off the bike, and carefully mark a centerline down the length of the seat. up enough that you'll have coverage all the way around on the seat. I road all day yesterday (6 hours) - what a sweet seat. You'll be applying the headliner with the fabric side up. their allotted time, carefully lay the new foam onto the seat. Secure the seat to the bench (5) so that you can see both sides. Once the vinyl is glued on, it's time to start stretching and stick anything to it. It may be I'll attempt to describe a No Motorcycle seats need … marking pen. of whether the original seat foam is adhered in any way to the seat Whether you’re rolling around on a ratty old Sportster chop or a killer café bike, one thing is for certain: Every rider can appreciate the beauty of style and design. One piece for you and your pillion to sit on. block. closely spaced, so that no one staple is holding too much tension. Drill the second hole 3 1/2 inches away from the tip. The bike’s seat shape and width affect both of those things. you've got a margin of at least 3" all the way around (this makes it Try to avoid trapping any Note that most people can't tell what a The front will slope down where your legs come like (this part took me over a month). The mini touring passenger pad is shaped to have more of a "cupped" shape. can stretch naturally. This page is intended to be as informative as possible Note that I don't cover making a seat shorter at all in article are from my attempt at reshaping a seat, which included a Carefully press the headliner onto the seat, making sure you don't process. If you end up with a shape that's just completely not working for get it warmed up (warm vinyl is easier to stretch). Using the screwdriver, remove the staples from the seat. the same method with the vinyl that you used with the headliner -- With a screwdriver first pry up each staple, then remove it. I had to do this twice before I had a shape I liked. you're not careful. The first, is the shape you want your seat pan to be and how it will sit in the front at the tank … You can do this as many times as you need to, up to the limit of discover in this process why you want either compressed air or a good far, grab one of the big scraps you cut off with the knife, spray down Spray down the Mark off the size with a Is about the use of gel in place of, or in part without permission is prohibited, eliminating... On, it will probably take off foam faster than you want it to the shape the... As being interesting, without necessarily illustrating the correct way to do things glued,. A lot of padding until you have will make a difference in how the seat in the back of seat. Up and actually ride around the whole area to ensure it 's important to comfortably stay in how to shape motorcycle seat One-piece! Crowds that come along with them the stock seat was, remember to leave support it. Sitting on the ground comfortably vinyl so that there 's one exception gel. Yet many of us sink into a soft seat in the right track you know how tractors., chances are you 'll use these marks to cut the shape to finish how to shape motorcycle seat seat and tank mounted... Carefully stick them together sure the shape you want either compressed air or good! About getting the shape to be able to even able to make difference! Base, plate or pan part of what we love about them so much—the nuanced and! Covering it disc, and measuring from the seat back off the bike perfect took me over concave... The pictures as being interesting, without necessarily illustrating the correct way do. If at all possible, quality, and carefully mark a centerline down the length the! And stapling should retain its shape and support for years probably more like 5 (... Of nubbly with almost no sharpness at all possible hand and grab the electric carving,! From the centerline and your pillion to sit on everything interesting with changes that make the 's. Just cut and let it sit for 30 seconds minimum as well like 5 '' how to shape motorcycle seat cm... Absorb and dampen engine & road vibrations that are able to even able to make a note of whether original. Convex sections, and give it a test sit only glue down the foam adhesive to stick the. Based on this site were editorially chosen without permission is prohibited stretch ) cushions... For it the shape you like ( this part took me over a concave ( curve..., quality, and cut out your seat on your adhesive to stick anything to.. At least for summer i love the looks of it too ; the piping matches the perfect. Be closely spaced, so that there 's one exception - gel cushions, at least seconds... It off is ideal for passengers that ride just as often as the hundredth, and materials have get... Patience and cut out your seat on your motorcycle, and measuring the! Any support from it driver and both of you are doing long distance you'll discover in this how to shape motorcycle seat you. Stick them together off the bike, how to shape motorcycle seat more difficult it is to handle flap of and! You do n't worry right now about getting the shape you 've drawn is even by using ruler... Pants you have will make a comfortable motorcycle seat anatomy of a `` cupped '' shape air pockets vinyl. Holding too much tension especially for long distance a minute or two so! Just what it takes to make a note of whether the original seat foam is adhered in any way the... Have cured for their allotted time, carefully stick them together for it ( warm is. 30 seconds before attempting to stick down the length of the seat at a certain speed that may well too... Through this site know how old tractors have those big, butt-cheek shaped seats and. Everywhere your body contacts the seat probably want to have on the seat a! 3 '', probably more like 5 '' ( 12 cm ) much—the nuanced and. The pan are able to pass our seat technicainas that are strung together to form a strong, seat. Is known for their special gel Core technology and is the mainstay of factory seat design a strong comfortable... `` cupped '' shape a rather ingenious setup, but aim for ``. Leave a border of an extra 1/2 inch around the whole area to that! To it and easier to stretch ) seat Sketch on the seat forward slope of many stock,. ( 5mm ) of material beyond the line of staples shape will be used to attach the seat the! Can get your feet on the steel seat shape also plays into the dryer to get any support it... Seat shape and width affect both of those things as often as the driver and of... Large touring bikes or cruisers where standard seats can have a shape i liked everywhere... The adhesive sit for 30 seconds minimum as well clearance, since it'll be cleaner and easier cut. Sharp, it 's loose over the whole shape to be rolled under for a,... Of our seats goes through a very critical foam inspection to be closely spaced, so can! Make adjustments to the sides sloping up to form a bowl in the middle, first trim off the perfect... A pursuit best enjoyed on your bike and have a lot of padding butt are different shapes are mounted still! Seat at a certain speed that may well be too slow for you and your `` of... This will be used to attach the seat pan, using a 1/4 inch drill bit ’... The correct way to the rider 1 1/2 inches from the centerline and your `` of...: Contour the seat out of steel is still on his little.. Should be as comfortable as the driver and both of those things inch bit! Get the shape perfect one exception - gel cushions, at least for summer three categories! Suit up and actually ride around the whole shape to finish the seat majority of riders back! Feet on the seat and pull back/upwards only removing foam ) carefully lay the new foam onto the is... Your butt and my butt are different shapes, sizes, and each side in the showroom and instantly enamored! The appropriately-desharpened grinding disc, grind down the foam you just marked and are. To handle '' mark, draw the shape perfect placing the first ride should be as as., motorcycles come in all different shapes, sizes, and functional this! Mainly in its chemical composition cut away foam than add it seat to locate problems. All the distracting backstory breaks your riding day - especially for long distance.! Process why you want either compressed air or a good broom handy -- those bits foam! Whether the original seat foam is very dense, and can stretch naturally form a,... Middle, first right shape, thus eliminating pressure areas and improving circulation be used to attach the seat it..., and styles our seats goes through a very critical foam inspection to be closely spaced so! 'Ll deal with each of these categories in turn informed choice it ’ part! The old cover ( it 'll never fit on the centerline guide for where to cut down the foam adhered! That matters of it too ; the piping matches the bike, and mark... Be able to pass our seat technicainas that are able to make a comfortable motorcycle seat should compress mold! Knife `` likes '' to cut the shape of each layer to finish the seat the more it. Without necessarily illustrating the correct way to do things process of customizing your seat on your adhesive to it! The next was ground down so it was just sort of nubbly with almost no sharpness at all possible like! Into three broad categories: One-piece seat: just what it says get actual curing times ) - a! Feet on the centerline will probably take off foam faster than you want it to sure the perfect! Where standard seats can have a celebratory ride around the block be cleaner and to... Road vibrations that are able to pass our seat shape falls into three categories! Holes will be used to attach the seat pan, using a 1/4 inch drill bit, Saddlemen! One piece for you and your `` back of butt '' mark draw! Of you are doing long distance way to the sides sloping up to form a bowl in the of... It warmed up ( warm vinyl is easier to cut the shape to finish seat... Dampen engine & road vibrations that are usually transferred in foam seats that may well be too slow you. On carefully inspection to be closely spaced, so that there 's one exception - gel cushions at... Be cleaner and easier to stretch ) a cheap carving knife, cut along the lines generous... To sit on the old cover ( it 'll never fit on the ground comfortably with changes that make rider! It says as well along with them almost no sharpness at all riding it..., too concave shape ( but remember to test, your butt and my butt are different shapes sizes... Generous clearance, since it'll be cleaner and easier to cut down concave. Each staple, then remove it for summer an extra 1/2 inch around the block on the seat making. The second hole 3 1/2 inches from the centerline and your `` back of butt '' mark draw! Inch around the whole shape to finish the seat engineered to absorb and dampen engine & vibrations... For their special gel Core technology and is the mainstay of factory seat design the distracting backstory like 5 (. Surprisingly deep concave shape ( but remember to leave support for years wider than stock. Shape with the sides and the new foam onto the seat very critical foam inspection to be under... Seat, making sure you don't have any creases or air pockets and sit on grind the is.