Standard 9:1 compression ratio ratio with forged flat top pistons. Includes Hastings rings; circlips and wrist pins.
Forged low compression Wiseco piston kit. 7:1 compression ration (stock is around 8:1) for improved reliability. Includes wrist pins; circlips and Hastings rings. Note: These Wiseco pistons will fit stock style Hastings rings with 1.2mm (0.047") top & middle ringlands and a 4.75mm oil ring.
High 10.5:1 compression ratio ratio with forged flat top pistons. No cylinder head modifications required. Includes Hastings rings; circlips and wrist pins.
High 10.5:1 compression ratio ratio with forged flat top pistons. No cylinder head modifications required. Includes Hastings rings; circlips and wrist pins.
High 10.5:1 compression ratio ratio with forged flat top pistons. No cylinder head modifications required. Includes Hastings rings; circlips and wrist pins.
Stock replacement forged piston kit. Stock 8.5:1 compression ratio. Complete with Hastings rings; circlips and wrist pins. Note: Will also fit Evo B.T. models equipped with Screamin'' Eagle cylinders heads; which will give a higher 9.5:1 compression ratio.
Stock replacement forged piston kit. Stock 8.5:1 compression ratio. Complete with Hastings rings; circlips and wrist pins. Note: Will also fit Evo B.T. models equipped with Screamin'' Eagle cylinders heads; which will give a higher 9.5:1 compression ratio.
Stock replacement forged piston kit. Stock 8.5:1 compression ratio. Complete with Hastings rings; circlips and wrist pins. Note: Will also fit Evo B.T. models equipped with Screamin'' Eagle cylinders heads; which will give a higher 9.5:1 compression ratio.
Stock replacement forged piston kit. Stock 8.5:1 compression ratio. Complete with Hastings rings; circlips and wrist pins. Note: Will also fit Evo B.T. models equipped with Screamin'' Eagle cylinders heads; which will give a higher 9.5:1 compression ratio.
High 10:1 compression ratio (standard is 9:1) for stock XL 1000 Sportster models. Will not fit XR style cylinder heads. Incl. forged pistons; wristpins; Hastings rings and circlips.
High 10:1 compression ratio (standard is 9:1) for stock XL 1000 Sportster models. Will not fit XR style cylinder heads. Incl. forged pistons; wristpins; Hastings rings and circlips.
Forged piston kit. 9:1 compression ratio (stock is around 8.5:1). Incl. Hastings rings; wrist pins and circlips. Note: Hastings ringlands used are 1st ring: 1.6mm; 2nd ring: 1.6mm and oil ring: 4.75mm.
9.5:1 compression. Converts your XL883 or XL1100 Sportster; re-using your stock cylinders; on 86-03 XL only; to 1200cc. Complete with reversed dome forged pistons; rings; wrist pins and circlips. Will install without modification to cylinder head. Piston weight approximately the same as stock; rebalancing is not necessary. Compression around 9.5:1. Tests have shown a 26% power increase on 883 models. Note: For 04-up XL models 1200cc cylinders must be used. The stock 04-up 883 cylinder liners are too thin for boring to 1200 size.
Forged low compression Wiseco piston kit. 7:1 compression ration (stock is around 8:1) for improved reliability. Includes wrist pins; circlips and Hastings rings. Note: These Wiseco pistons will fit stock style Hastings rings with 1.2mm (0.047") top & middle ringlands and a 4.75mm oil ring.
Standard 9:1 compression ratio ratio with forged flat top pistons. Includes Hastings rings; circlips and wrist pins.
Very high 12:1 compression ratio. Racing only. Standard 3-1/2" bore; domed pistons. Includes forged pistons; Hastings rings; wrist pins and circlips. Note: See 908655 for a replacement Hastings piston ring set. Note: Oversizes are not available.
High 10.5:1 compression ratio with forged domed pistons. Includes Hastings rings; wrist pins and circlips.
96-103" big bore conversion kit. 9:1 compression ratio. Converts the stock 96" Twin Cam to 103" with stock heads. Stock cylinders must be bored from 3 3/4" (3.750") to 3-7/8" (3.875") to accept the 103" big bore pistons. Comes with reversed dome forged pistons; Hasting rings; circlips and wrist pins.
96-103" big bore conversion kit. 10.5:1 compression ratio. Converts the stock 96" Twin Cam to 103" with stock heads. Stock cylinders must be bored from 3 3/4" (3.750") to 3-7/8" (3.875") to accept the 103" big bore pistons. Comes with reversed dome forged pistons; Hasting rings; circlips and wrist pins.
96-103" big bore conversion kit. 10.5:1 compression ratio. Converts the stock 96" Twin Cam to 103" with stock heads. Stock cylinders must be bored from 3 3/4" (3.750") to 3-7/8" (3.875") to accept the 103" big bore pistons. Comes with reversed dome forged pistons; Hasting rings; circlips and wrist pins.
High 10:1 compression ratio (standard is 9:1) for stock XL 1000 Sportster models. Will not fit XR style cylinder heads. Incl. forged pistons; wristpins; Hastings rings and circlips.
10:1 compression ratio. Will fit with stock and 101HP Thunderstorm heads. Incl. forged pistons; Hastings rings; wristpins and circlips. Note: See 912702 for the required gasket kit.
Forged piston kit. 9:1 compression ratio (stock is around 8.5:1). Incl. Hastings rings; wrist pins and circlips. Note: Hastings ringlands used are 1st ring: 1.6mm; 2nd ring: 1.6mm and oil ring: 4.75mm.
Forged piston kit. 9:1 compression ratio (stock is around 8.5:1). Incl. Hastings rings; wrist pins and circlips. Note: Hastings ringlands used are 1st ring: 1.6mm; 2nd ring: 1.6mm and oil ring: 4.75mm.
Forged high compression Wiseco piston kit. 9.5:1 compression ration (stock is around 8:1). Includes wrist pins; circlips and Hastings rings. Note: These Wiseco pistons will fit stock style Hastings rings with 1.2mm (0.047") top & middle ringlands and a 4.75mm oil ring.
Forged high compression Wiseco piston kit. 9.5:1 compression ration (stock is around 8:1). Includes wrist pins; circlips and Hastings rings. Note: These Wiseco pistons will fit stock style Hastings rings with 1.2mm (0.047") top & middle ringlands and a 4.75mm oil ring.
Forged aluminum. Domed 10:1 high compression piston kits include wrist pins; circlips and Hastings rings. Compatible with OEM heads. Note: Pistons will fit stock style Hastings rings with 1.6mm (0.062") top & middle ringlands and 4.0mm oil rings.
Forged aluminum. Domed 10:1 high compression piston kits include wrist pins; circlips and Hastings rings. Compatible with OEM heads. Note: Pistons will fit stock style Hastings rings with 1.6mm (0.062") top & middle ringlands and 4.0mm oil rings.
Forged aluminum. Domed 10:1 high compression piston kits include wrist pins; circlips and Hastings rings. Compatible with OEM heads. Note: Pistons will fit stock style Hastings rings with 1.6mm (0.062") top & middle ringlands and 4.0mm oil rings.
Forged aluminum. Domed 10:1 high compression piston kits include wrist pins; circlips and Hastings rings. Compatible with OEM heads. Note: Pistons will fit stock style Hastings rings with 1.6mm (0.062") top & middle ringlands and 4.0mm oil rings.
9.5:1 compression. Converts your XL883 or XL1100 Sportster; re-using your stock cylinders; on 86-03 XL only; to 1200cc. Complete with reversed dome forged pistons; rings; wrist pins and circlips. Will install without modification to cylinder head. Piston weight approximately the same as stock; rebalancing is not necessary. Compression around 9.5:1. Tests have shown a 26% power increase on 883 models. Note: For 04-up XL models 1200cc cylinders must be used. The stock 04-up 883 cylinder liners are too thin for boring to 1200 size.
9.5:1 compression. Converts your XL883 or XL1100 Sportster; re-using your stock cylinders; on 86-03 XL only; to 1200cc. Complete with reversed dome forged pistons; rings; wrist pins and circlips. Will install without modification to cylinder head. Piston weight approximately the same as stock; rebalancing is not necessary. Compression around 9.5:1. Tests have shown a 26% power increase on 883 models. Note: For 04-up XL models 1200cc cylinders must be used. The stock 04-up 883 cylinder liners are too thin for boring to 1200 size.
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