I was wanting to decrease my rear tire size to an 18" instead of a 21" using the stock rims for now. Would I have to change the gearing or would it run fine.




04 Yamaha Blaster
jetted k&n filter
soon to come
240cc big bore kit
fmf sst pipe/silencer
suspension upgrades
Renthal handle bars
motionPro twist throttle
maier plastic seat cover

 

it depends, on if you want to gain bottom end and loose a bit of top end then keep the same gearing..........................if you want it to feel like it did with the 21's go up 1 or 2 teeth inn front and drop 1 or 2 teeth in back

 

Just changed the gearing to 12/38 and put on holeshot mxr4 18'10'8' feels like it need more top end. Bottom end is fine. Can pull my friends 400ex for 300ft. till he passess me.