2001 yz125

[yz125j]

Hey guys

I want to completely rebuild my bike this winter for racing next summer(01 yz125). I have renthal fatty bars, tripple clamp, racing sprockets, new clutch, asv levers and vforce 3 kit. Now, i want to keep all that. What else would you put on this bike (besides a stroker/big bore)? I want to get all that power i can in the 125 2 stock class. I was thinking a FMF sst and FMF powercore2. I would like to see an option on new piston and rings. All ideas are more than welcome.
Thanks for all the help guys.

EDIT:
do they make racing spark plugs?
also what gas to fuel ratio,type of oil and trans fluid do you recomend?

 

[CRazy250]

id go with a pro circuit exhaust with stock silencer for good bottom end power.dual stage boyesen reeds increase performance all around on the powerband and get it jetted spot on.change the gearing 1 or 2 teeth bigger on the rear sprocket. that should be good.

 

[whenfoxforks-ruled]

What stock class can you run mods to enhance power? First thing is suspension,then get it jetted properly. With some good petroleum products! http://www.precisionautoresearch.com/page4.html