I'm in need of some piston help for an 800BB. Am after 83.5 or 84mm pistons that will fit an 800. I got these BB cylinders but don't really want to buy pistons from RKT or SHR...I'm after plain old pistons, not the $350 "custom" route. I know nothing about these particular cylinders so I need to figure everything on my own. Have them port mapped but need some help with the pistons so I can get accurate timing. I'm teaching myself and doing tons of reading...am at the stage where I know just enough to get myself into trouble 
Just got done doing a 700/752 BB on my buddies with Wiseco Yami PWC pistons. Only problem was the wrist pin is 2.7mm down vs the stock piston and we needed a 1mm shim with another 1.2mm in base gaskets. This model of piston goes to an 84 so it potentially could work.
Can someone tell me the wrist pin offset on the stock 800 piston and the height (don't have one here to measure) Or does anyone know what PWC pistons SHR use to use in his 840 BB's? I asked about his old pistons and he obviously wants to sell me his custom ones. Anyone know the stock 800HO exhaust height?
Some pics:
yami pwc specs
830 port map
will need case porting
(don't mind the alum shavings...junk 700 crank)
Just got done doing a 700/752 BB on my buddies with Wiseco Yami PWC pistons. Only problem was the wrist pin is 2.7mm down vs the stock piston and we needed a 1mm shim with another 1.2mm in base gaskets. This model of piston goes to an 84 so it potentially could work.
Can someone tell me the wrist pin offset on the stock 800 piston and the height (don't have one here to measure) Or does anyone know what PWC pistons SHR use to use in his 840 BB's? I asked about his old pistons and he obviously wants to sell me his custom ones. Anyone know the stock 800HO exhaust height?
Some pics:
yami pwc specs
830 port map
will need case porting
(don't mind the alum shavings...junk 700 crank)
