New aftermarket 91mm bore piston and cylinder kit with gaskets rings wrist pins and circlips
10.3 compression ratio
This is a ready to bolt on kit, this will work with 800HO 800R and 650 engines.
If you install this on a 650 you will need to have your ecu flashed or a inline tuner installed.
No dowel pins included, you will need to transfer these from your engine
Replaces OEM Part Numbers: 420296775 420685714 420613586 420296774 420216270 420845106 420630210
