parts?
Cost depends alot upon condition of things like happyboy said and what mods needed to be done.Valves should always be replaced every rebuild and spring pressures checked.Lowest price rebuild I sent out was $500 which was to update was a very low hr motor.Cost can very grealy from there depending upon condiont of parts,crank,piston,sleeve,cams,decomp,buckets,bearings, etc. New stock cranks are readily available with the z400 bearing from Cannonboomer and Blackwidow. Parts are never an issue for getting fast unless wanting modded with stroker cranks.Stroker cranks you will have a long. Big bore kits are on the shelf. Porting is usually a 2 week turn around time. Last month porting was about 4 weeks but should be back to normal in a week or 2. Right now I'm not taking orders on cranks of any stroke because catching up.Labor for a rebuild at this time costs $350.That includes full inspection of every part including bucket bores down to the one way bearing.