Seat bump works great I bought the cover with the bump the first time for my 07 rmz250 and loved it got a 2013 rmz250 this year and wanted my bump back but still wanted my stock cover bought the bump even though factory effex said it wouldn't work with the stock cover but it does and looks great. just took the staples out from the back to the middle of the seat put the bump on and stretched the cover back over real factory look.
i love this bump in my seat! i put it right where i want it and it works great! no shaving the seat down or anything just pull the paper off the bottom stick it on and put the cover back on! easy to install and holds you it the place you wanna be on the bike!
Beware! This is very hard to get a clean looking seat when using the SDG tall seat cover. The package on the bump says it will work but it is very hard to make it look nice. I would say spend the extra money and get the factory effex seat cover.
Otherwise the bump is a good way to keep you in your proper rider position when you start getting tired in the middle of a long moto.
its a product that you never knew you needed it just works. installation was was eazy just make sure you start from the front of the seat to the back so the cover stays tight on the front of the bump. over all it looks factory and works great 5 stars!
the Factory Effex Bump Seat Foam is added on top of the existing foam to better keep the rider in the desired position on the bike.
I would recommend taking the seat to a custom upholstery shop and see if they can replace the foam on the seat pan for you.
I would say yes factory effex would tell you no but I bought one for my 2013 rmz250 and used my stock seat cover and looks great. if the cover already on when you get the bump just take the staples out from the back up to the middle of the seat both sides then put the bump on then stretch the cover back over. start stapling from the front to the back do both side at the same time don't staple one side all the way at a time.