01 Yz125 jetting

ChrisZx7

New Member
May 15, 2012
794
4
0
Rochester, Ny
Buddy just picked this up. Having ish with the jetting. Only mod is a Dynoport exhaust with stock silencer.

Dynoport said keep stock or maybe go up one.

Stock is 25/460

He had 25/340

We put 25/460

Power band is awesome. Has a bog in 1/4 throttle. We moved clip from 2nd to last to middle position. Where do we go from here?
 
Found out theres a 45 pilot in it, hmm. Found a 25 in my garage, throwing that in now. Since stock is 25, and Dynoport said keep stock, we will see what happens.
 
Presuming carb is clean, float set, try tweeking air screw.

also air filter clean, plug fresh, compression good, and no air leaks also lol

i had an 01 yz125, had a pro circuit pipe and silencer, pro circuit recommended upping the main 2 sizes for my area, jersey at the time, ran perfect. but i kept the top end fresh, fresh gas at all times, new plug, and cleaned the air filter religiously.
 
also air filter clean, plug fresh, compression good, and no air leaks also lol

i had an 01 yz125, had a pro circuit pipe and silencer, pro circuit recommended upping the main 2 sizes for my area, jersey at the time, ran perfect. but i kept the top end fresh, fresh gas at all times, new plug, and cleaned the air filter religiously.

Air filter is clean, fresh oil on it. New plug. Compression is good.