1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 BIG BORE KIT

Part Number: 93-791

BIG BORE KIT - Part Number 93-791
The Ross 1200cc Big Bore conversion kit for Evolution 883cc & 1100cc Sportster will convert your 883 or 1100 to 1200cc (73.3 C.I.), like all Ross pistons, these units are forged for ultimate strength. The piston-pin assembly weights the same as the stock assembly so that your engine does not need to be re-balanced. They can be installed in the bike without splitting the case. Your cylinders must be bored to accommodate this kit, however, everything else is included: reverse dome pistons, pins, rings, spiro-lox, and gaskets. No head modification necessary with the Ross inverse dome.
3.608 Bore 3.812 Stroke 9.75 CR 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999

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