WISECO 4721P1 FORGED OVERBORE 1207cc PISTON RINGS HARLEY SPORTSTER 1200 1100 EVO. This product data sheet is originally written in English. WISECO HIGH PERFORMANCE 1207cc FORGED OVERBORE PISTON FOR HARLEY SPORTSTER APPLICATIONS. WISECO PART NUMBER: 4721P1 — AS USED IN WISECO K1686 PISTON KIT. 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 Harley Davidson Evo Sportster 1200 (1988 – 2003). 1986 1987 Harley Davidson Evo Sportster 1100 1986 – 1987. 1x WISECO 4721P1 10.5:1 COMPRESSION FORGED PISTON. 1x WISECO 3507X PISTON RING SET. 1x WISECO S530 WRIST PIN. 1x WISECO W5731 ROUND WIRE WRIST PIN LOCKS / CIRCLIPS (PAIR). Bore – Standard: 3.498in. Bore – Actual: 3.508in. Compression Ratio – Actual: 10.5:1. Valve Pocket Depth-Intake. 215in. Valve Pocket Diameter-Intake: 2.100in. Valve Pocket Dept-Exhaust. 215in. Valve Pocket Diamter-Exhaust: 2.100in. Note: No cylinder head modification required. Valve pocket dimensions measured from deck height. I’M RELISTING HERE AS A COURTESY TO ANYONE WHO IS IN NEED OF MORE AS MY SUPPLIER SAYS SHE CAN PROVIDE ME WITH ADDITIONAL… IT WILL JUST TAKE A FEW DAYS TO GET AS SHE WILL HAVE TO ORDER IT IN. PLEASE NOTE THAT THE ABOVE PICTURE IS NOT WHAT YOU WILL RECEIVE, IT IS A DEFAULT PICTURE. IF YOU NEED ANY INDIVIDUAL COMPONENTS OF THIS WISECO PISTON OR ANY OTHER WISECO SPORTSTER 1100 – 1200 PART ON IT’S OWN, LET ME KNOW AND I WILL SEE IF I CAN SUPPLY IT FOR YOU. PISTON KITS: K1685 K1686 K1687 K1688 K1689. PISTONS: 4721PS 4721P1 4721P2 4721P3 4721P4. RINGS: 3497X 3507X 3517X 3527X 3537X. CONTACT ME FOR ALL YOUR WISECO PISTON NEEDS!! Check out my other items! Be sure to add me to your favorites list!