Want's to see grandma's Snapper....
Join Date: Dec 2008
Location: North Jersey
Yamaha WR250R Transformation
As some of you already know, I picked up a 2013 WR250R. My original idea was to use this bike as a true dual sport and use it to zip around town and occasion rides into NYC where I work. Well, the places that my buddies are ridding require true off road knobbies, so that idea sort of went out the window.
I then went on a modding spree, dropping weight and trying to improve performance.
So far what I have done is as follows:
Flapper mod - Under the seat is a servo that opens and closes a flap that allows more air into the air box. I removed this mechanism and the wiring attached.
EXUP servo removal / Replace stock exhaust with FMF Q4 - When removing the stock exhaust, you must disconnect the EXUP, which an exhaust valve. Once disconnected, you can remove all of the wiring and servo itself. Once this is removed, an emulator (or dummy plug as I call it) is needed to keep the check engine light from coming on. The FMF Q4 sounds awesome and is a lot lighter than the stock exhaust.
AIS (Air induction System) Removal - Once an aftermarket exhaust is added, this is no longer needed.
Sprockets and Chain - Previous owner had a 42t rear sprocket installed. Stock is 43. That gearing is way too tall for off road use. Switched to a 48t rear and 13t front. Great mod. Also got a 112 link standard colored DID chain.
Protective accessories - Added Cycra hand guards. Moose racing skid plate and Flatland racing radiator guard. Must haves for single track woods riding.
Tires - I am lucky to have great friends. One gave me practically brand new off road tires. Perelli MT ? (forget which one) and a Metzeler front. Great step up from the tires that came with the bike.
Added Decals - A 20hp increase minimum. Highly recommended.
So far with all of these mods, the bike feels like a brand new bike. Next on the list is to have the suspension rebuilt. OEM is not that great. Will probably need need springs as I am heavier than the stock springs recommend. I will post as I progress. Pics are coming. Thanks for looking!
"Whether you succeed or fail is dependent entirely on you" - Vic Armstrong