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I am 15.I have a o4 crf100f and i was wondering what i could do that is cheap(under $100) to make my bike go faster.any suggestions please.

Jake
Go look at the other CRF100 inputs. Lots of good cheap mods. I did the sprocket and air box bods. Bike is alot funner.

did it make it faster

Thks anyone else have anymore suggestions please tell me

If you want to go "faster" That is more top speed
the air box mod...............................$00.00.
pipe mod...........................................00.00
14 tooth countershaft sprocket...........25.00
Power up kit........................ about 28.00
Uni or twin Air filter..........................25.00
If you want to go "quicker" but not quite as "fast" That is, how quickly you get to a little less top speed.
Do all of the above but go for a 12 tooth counter sprocket (if they make one) or get the next size bigger rear sprocket. You are probably better off staying with the 13 c/s and adding a tooth on the rear. This would not be as drastic a change as going with the 12 tooth c/s You should be able to do all that for under a $100.00 Rear sprocket should be available for under $50.00

Sorry I thought that we were discussing a 150. But.... the same principles apply Regardless of what your c/s size is. Drop a tooth on the c/s and go quicker add a tooth and go faster. Keep in mind though that changing the c/s size causes a BIGGER Not necessarily a Better difference. Changing a tooth either way on the front is like changing 3 teeth the other way on the rear. Smaller changes are achieved by adding a tooth to the rear and not changing the c/s to go quicker dropping a tooth on the rear and not changing the c/s to go faster.

thanks appreciate the advice ill try it