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.
Natural aluminum finish Fits stock 84-99 Evo Big Twins with 4-1/4" stock stroke flywheels. Comes complete with 5.375" (stock length is 5.550") 3-5/8" Big Bore cylinders; forged pistons; rings wrist pins and head & base gaskets. Compression ratio 9.2:1. Engine life can be expected to be very good due to the stock stroke. Note: Due to the shorter than stock cylinders a special S&S Super E manifold (MCS 951095) and shorter S&S pushrods (MCS 905081) must be purchased separately. Note: Crankcase spigots must be bored for 3-5/8" cylinders.
Replacement forged piston set. Fits all 100" and 107" 4" bore Super Sidewinder engines. Will also fit the special (out of production) 100" Evo type retro-fit engine for Shovel chassis; which is equipped with small diameter flywheels. Incl. pistons; wrist pins; wristpin clips and piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.
Replacement forged piston set for 4" bore Super Sidewinder Evolution type S&S engines (excl. TC). Pistons include wrist pins; wrist pin clips and piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.
Replacement forged piston set. Fits all 100" and 107" 4" bore Super Sidewinder engines. Will also fit the special (out of production) 100" Evo type retro-fit engine for Shovel chassis; which is equipped with small diameter flywheels. Incl. pistons; wrist pins; wristpin clips and piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.
Cast aluminum OEM style pistons for a stock 1200cc Side Valve rebuild. Pistons include wrist pins; retainers & piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.
Cast aluminum OEM style pistons for a stock 1200cc Side Valve rebuild. Pistons include wrist pins; retainers & piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.
Cast aluminum OEM style pistons for a stock rebuild. Wil fit all 29-73 45" (750cc) Flathead models. Pistons include wrist pins; retainers and piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.
Cast aluminum OEM style pistons for a stock rebuild. Wil fit all 29-73 45" (750cc) Flathead models. Pistons include wrist pins; retainers and piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.
Cast aluminum OEM style pistons for a stock rebuild. Wil fit all 29-73 45" (750cc) Flathead models. Pistons include wrist pins; retainers and piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.
OEM style replacement. Gloss black S&S cast iron replacement cylinder kit; ready to bolt-on as stock replacement. Supplied with stock 5.330" length cylinders; forged pistons; piston rings; wrist pins; wrist pin keepers; head & base gaskets; cylinder head bolt kit and a cylinder base nut kit. Compression ratio around 8:1.
Titanium top collars. Beehive style springs. Incl. steel lower collars and valve key set. Good street and performance spring set to .600" lift. Spring OD 1.445" to 1.095". Pressure [email protected]"; [email protected]". Coil bind .1230".
Titanium top collars. Beehive style springs. Incl. steel lower collars and valve key set. Good hot street and race performance spring set to .690" lift. Spring OD 1.185" to 1.589". Pressure [email protected]"; [email protected]". Coil bind 1.150".
Stock style high performance one-piece Beehive spring set. Seat load: [email protected]". Open load: [email protected]". Coil bind: 1.150". Rate lbs / inch: 293. compatible with OEM upper and lower collars and high performance applications. Set includes springs only.
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.
Replacement; recessed dome; forged piston kits for used with S&S Evolution SuperStock heads only in combination with components with stock dimensions (bore 3-1/2"; stroke 4-1/4" and cylinder length 5.550"). S&S tolerance recommendations: Close fit .0015" to .002". Loose fit: .003" to .004". Will give approx. 10.1:1 CR. All pistons include wrist pins; wrist pin clips and piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.
Replacement recessed dome pistons for 3-5/8" Big Bore applications. Will fit 84-99 Evolution Big Twin models with S&S SuperStock heads only and 3-5/8" bore cylinders in combination with 4-1/4" (5.375" cylinders; 9.4:1CR); 4-1/2" (5.500" cylinders; 9.8:1CR) and 4-5/8" (5.565" cylinders; 10.1:1CR) strokes. S&S tolerance recommendations: Close fit .0015" to .002". Loose fit: .003" to .004". All pistons include wrist pins; wrist pin clips and piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.
Replacement recessed dome pistons for 3-5/8" Big Bore applications. Will fit 84-99 Evolution Big Twin models with S&S SuperStock heads only and 3-5/8" bore cylinders in combination with 4-1/4" (5.375" cylinders; 9.4:1CR); 4-1/2" (5.500" cylinders; 9.8:1CR) and 4-5/8" (5.565" cylinders; 10.1:1CR) strokes. S&S tolerance recommendations: Close fit .0015" to .002". Loose fit: .003" to .004". All pistons include wrist pins; wrist pin clips and piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.
.570" valve lift. IOG = gear drive cams with Inner & Outer drive Gears. Complete kit with installation hardware; bearings and gasket. Bolt-in 88" to 103" with 9:1 to 10:1 CR. 3200-5700 RPM overall power increase. The gear drive system is in fact a revolutionary different and much more reliable construction. Especially in high lift/performance applications; when compared with the OEM chain-drive design. A gear driven camshaft is stronger and will not give any of the mechanical problems connected with the OEM chain driven camshafts. The S&S gear drive kit will increase valve timing accuracy; and therefore horsepower; by eliminating the timing chain lash and loosely fit stock cam gears. The only downside of gear drive is that you may experience a slight increase in mechanical sound; this is why OEM is using a chain. It has no other mechanical advantages whatsoever. Since the chain guides and tensioner are eliminated there is no longer the possibility for these parts to fail and damage other engine parts. The S&S gear drive kit reverses the direction of rotation of the rear cam; providing additional operating clearance between cam lobes. As a result; higher cam lifts are possible with the S&S gear driven cams. Note: With the exception of the 475G and 510G cam; adjustable pushrods (like MCS 503573) are required to compensate for the smaller camshaft base circle of these cams. Note: Material may have to be removed from the inner surface of the OEM gear cover before instal
.585" valve lift. IOG = gear drive cams with Inner & Outer drive Gears. Complete kit with installation hardware; bearings and gasket. Bolt-in 88" to 106" with 9.7:1 to 10.5 CR and 106" to 124" with 9:1 to 10:1 CR. 3500-6000 RPM for 88" to 103" and 2500-5500 for larger engines. The gear drive system is in fact a revolutionary different and much more reliable construction. Especially in high lift/performance applications; when compared with the OEM chain-drive design. A gear driven camshaft is stronger and will not give any of the mechanical problems connected with the OEM chain driven camshafts. The S&S gear drive kit will increase valve timing accuracy; and therefore horsepower; by eliminating the timing chain lash and loosely fit stock cam gears. The only downside of gear drive is that you may experience a slight increase in mechanical sound; this is why OEM is using a chain. It has no other mechanical advantages whatsoever. Since the chain guides and tensioner are eliminated there is no longer the possibility for these parts to fail and damage other engine parts. The S&S gear drive kit reverses the direction of rotation of the rear cam; providing additional operating clearance between cam lobes. As a result; higher cam lifts are possible with the S&S gear driven cams. Note: With the exception of the 475G and 510G cam; adjustable pushrods (like MCS 503573) are required to compensate for the smaller camshaft base circle of these cams. Note: Material may have to be r
.640" valve lift. IOG = gear drive cams with Inner & Outer drive Gears. Complete kit with installation hardware; bearings and gasket. 95"-up with 10.5:1 to 11.5:1 CR (stock in S&S 124" engines). The gear drive system is in fact a revolutionary different and much more reliable construction. Especially in high lift/performance applications; when compared with the OEM chain-drive design. A gear driven camshaft is stronger and will not give any of the mechanical problems connected with the OEM chain driven camshafts. The S&S gear drive kit will increase valve timing accuracy; and therefore horsepower; by eliminating the timing chain lash and loosely fit stock cam gears. The only downside of gear drive is that you may experience a slight increase in mechanical sound; this is why OEM is using a chain. It has no other mechanical advantages whatsoever. Since the chain guides and tensioner are eliminated there is no longer the possibility for these parts to fail and damage other engine parts. The S&S gear drive kit reverses the direction of rotation of the rear cam; providing additional operating clearance between cam lobes. As a result; higher cam lifts are possible with the S&S gear driven cams. Note: With the exception of the 475G and 510G cam; adjustable pushrods (like MCS 503573) are required to compensate for the smaller camshaft base circle of these cams. Note: Material may have to be removed from the inner surface of the OEM gear cover before installation of the S&S
.570" valve lift. IOG = gear drive cams with Inner & Outer drive Gears. Complete kit with installation hardware; bearings and gasket. Bolt-in 88" to 103" with 9:1 to 10:1 CR. 3200-5700 RPM overall power increase. The gear drive system is in fact a revolutionary different and much more reliable construction. Especially in high lift/performance applications; when compared with the OEM chain-drive design. A gear driven camshaft is stronger and will not give any of the mechanical problems connected with the OEM chain driven camshafts. The S&S gear drive kit will increase valve timing accuracy; and therefore horsepower; by eliminating the timing chain lash and loosely fit stock cam gears. The only downside of gear drive is that you may experience a slight increase in mechanical sound; this is why OEM is using a chain. It has no other mechanical advantages whatsoever. Since the chain guides and tensioner are eliminated there is no longer the possibility for these parts to fail and damage other engine parts. The S&S gear drive kit reverses the direction of rotation of the rear cam; providing additional operating clearance between cam lobes. As a result; higher cam lifts are possible with the S&S gear driven cams. Note: With the exception of the 475G and 510G cam; adjustable pushrods (like MCS 503573) are required to compensate for the smaller camshaft base circle of these cams. Note: Material may have to be removed from the inner surface of the OEM gear cover before instal
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