yz250

I gothcha.
I have no idea.
If your thinking of a big-bore then it originally having a Nikasil bore makes no difference anyway.
 
well I can get a full 89 motor with everything for 200$ so im thinking about it I think it runs I dont no how to rebuild motors yet so how much you think it would be to rebuild the hole motor with all berings and gaskets and what not.
 
You can do a full rebuild of that motor for around $375.
This includes a new piston, pin, upper bearing, rings,
new crank, rod, gaskets, seals from Wiseco.
 
This way its easier to get parts all i would need is ill get a airstriker carb and a k@n jet it correct,mojave radiator with custom colored hoses done