i had esr do it the same way they do it for their 76mm stroker, it says esr9 on the bottom of the intake, but the brush strokes on the inside look somewhat different in certain places.

 

brush strokes???

 

you know, not brush strokes, the marks that are made when they grind it.

 

What about a polanda if you want some real power?

 

no thanks, those require lots of case mods, and i cant go back to normal 250r cylinders

 

I have a 330R motor for sale. Brand new center cases. all work was done by east coast atv. had 3 new gears replaced in the trans. The motor has 4 rides on it. comes with curtis sparks 330 big bore pipe and silencer, 39mm air stryker , hinson quick change cover and cool head. $3000 for all. Sold my R to build a crf 450R

 

powervalve motor?