• Drag part number: 0903-0145
• Manufacturer Number: K1661
• HIGH-PERFORMANCE FORGED PISTON KITS
• Wiseco’s high-tech manufacturing ensures greater operating strength and lower expansion at high temperatures
• Kits include forged pistons with ArmorGlide coated skirts, rings, retainer clips, chrome piston pins
• Twin Cam pistons have ArmorPlating which improves ring seal, eliminates ring micro-welding, and improves the piston’s ability to defend against detonation damage
• Piston kits are available with X-Ring package (.062 top ring, .062 compression ring and .158 oil ring), XC-Ring packages (.039 top ring, .062 compression ring, .158 oil ring) or VM-rings (1.2mm steel, positive twist, gas nitrided top ring, 1.2mm cast iron, taper under-hook scraper ring and 2.0mm three-piece, flex-vent oil ring with steel chrome-faced rails); VM-rings, X-Rings and XC-Rings will not interchange
• X- and XC-rings are identified by PART # in the application chart; X-Ring PART #s end with an “X” and XC-Ring PART #s end with an “XC”
• 103″ kits require cylinder boring; 110″ kit requires big-bore cylinders and case boring; X-Ring package (.0472″ top ring, .0472″ compression ring and .118″ oil ring); recalibration required
• Pistons are made in the U.S.A.
• NOTE: Replacement rings include rings for one piston only.
• WARNING: Wiseco pistons that use VM-rings can only be fitted with Wiseco VM-rings; Wiseco pistons that use XC-rings can only be fitted with Wiseco XC-rings.

• Product Name: Rebuild Kit
• Type: Top End
• Piston Material: Aluminum
• Piston Material: Forged
• Bore Size: 3.508″
• Piston Size: +0.010″
• Displacement: 1200 cc
• Stroke Length: 3-13/16″
• Compression Ratio: 9.0:1
• Units: Each
• Riding Style: Street

1996-2003 Harley-Davidson 1200 Custom XLC 1996-2003 Harley-Davidson 1200 Sport XLS 1988-2003 Harley-Davidson Sportster 1200 XLH 1997-2002 Buell M2 Cyclone 1997-2002 Buell S3 Thunderbolt 1997-2000 Buell S3T Thunderbolt 1999-2002 Buell X1 Lightning 1988 Buell RR 1000 Battletwin 1996-1998 Buell S1 Lightning 1994-1995 Buell S2 Thunderbolt