The Honda PCX / Forza / ADV150 / SH Forums

I see many people asking about removing the seat hump from the Honda PCX scooter or availability of different seats that come without the hump. I am not even that tall at 5'9, 32 inch pants inseam and I still found that the hump was crowding me forward so I came up with a nearly free mod to remove it.
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Just unbolting the hump leaves the plastic mounting point of the seat pan still sticking up through the fabric. It is very easy to just trim this section of the seat pan away with a rotary cutting tool.
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You can see that you will have to patch the two round holes in the cover and add some foam before sliding in some plastic from a milk jug above the opening to form the new seat pan.
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I got a scrap of carpet pad free from the carpet store and bought a small piece of seat fabric and some vinyl adhesive from the fabric store.
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Cut 4 circles of fabric by tracing around an old cap from a coolant jug. Sandwich them together, inside and out to repair the holes. After that dries you can add another bead of adhesive around the outside to seal the edges down. This has been a really good repair and shows no sign of coming loose after a year of riding and 8,000 miles.
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Trial fit a couple stacks of the 1/2 inch carpet pad and temporarily slide in the plastic you cut from the jug on top of the opening in the pan to adjust for an even feel to the foam when sitting on the seat. I only ended up using two layers even though it looks like you would need more to bring it up even. You can build in a nice pocket to suit and removing the hump gains 3-4 inches of legroom. Once you are happy with the foam you can hot glue the pieces of flat plastic across the inside opening of the pan to support it.
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This is a very cost effective mod and highly recommended.

Nice simple and cheap mod, I like it

Many thanks. Another great post worthy of a sticky note

I think this is the most economical humpectomy I've seen.

Do you have any closer shots of the patches? I wonder if there's a way to hide them better, you can see them pretty well. Still, a very functional mod.

No way to really hide the patches but it avoids the expense of having an upholstery shop re do the whole seat. The patches have stayed 100% functional for over a year and show no signs of coming loose.

Great tip! Now I have something meaningful to do during the dark months... Would also like some close-up shots on the mod, I'm not sure I understood everything of the "needlecraft" english...

Well done. I'd like to see a finished shot underneath.

Just taken mine to an upholsterer, should get it back Saturday.

Photo of the inside showing the white plastic I slid into place and never bothered to glue. The red underneath it is the carpet foam pad I added.
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Hi! Did you remove the fabric when you did this? Off the seat? Were you just really careful not to poke through? Thanks.

I didn't remove the fabric. There is a lot of foam there to keep you away from the fabric.

ingenous idea

sendler2112

sendler2112 wrote:...

Do you mind reposting/rehosting the pics? I'm planning on doing a humpendectomy on my PCX150.

DAB wrote:Just taken mine to an upholsterer, should get it back Saturday.

That's what I did, but a specialist motorcycle one. Seems more sensible than waiting for a package from the other side of the world

Humpectomy.
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sendler2112 wrote:Humpectomy.

Thank you! Looks like I may have my next weekend project!

cut out 4 circles of vinyl and glue them together inside and out to cover the holes. cut some carpet foam to level the gap and slide some sheets from a milk jug to hold the inside. the patches have held up unchanged for 10,000 miles.

Conducted my humpectomy tonight. Initial tests are very positive! I'll post pics tomorrow (too dark right now).

Before:




Cut it out:




Post removed:






Foam inserts (I used some chair padding foam I had laying around):




Finished product:


I had to reapply glue to the edges of the left patch, tested it out and it's perfectly comfortable!

My patches have been on for 14,000 miles and haven't changed. Still the same as the day I put them on. I put a matching patch on the inside as well and glued the whole thing together. This is a great mod and makes the seat perfect without having to order anything or recover the seat.