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Black with highlighted fins. This is a quality 4.25" bolt-on big bore cylinder kit for 107" M8 models with stock 3.937" bore x 4.375" stroke. Kit can be used with a 4.25" Wiseco big bore piston & ring kit. Cylinders include dowel pins and are marked for correct front/rear installation. Capacity will increase from stock 107" (106.52" / 1746cc) to a hefty 124" (124.13 / 2034cc) but still installs without crankcase machining. Flywheel re-balancing is not required. Compression ratio is 1:11 and is compatible with the stock camshaft. Includes installation instructions.
Note: Order 576555 Wiseco 4.25" bore conversion piston & ring kit & 576556 Wiseco gasket kit separately.

107" to 124" 4.25" big bore conversion cylinders for M8

#709141

Stock:No

High compression.
Black cylinders with highlighted fins.
With +8.5cc piston dome.
Compression ratio 12.7:1 for 132" and 13.1:1 for 136" with stock 88cc heads.
Compression ratio 12.1:1 for 132" and 12.3:1 for 136" with SE Extreme Port 94cc heads.
Largest possible 4.320" bore bolt-in big bore kit.
132" (2162cc) is achieved when used with stock 114" flywheels.
136" (2222cc) is achieved when used with S&S 923270 4-5/8" stroker flywheels.
Works with stock crankcases, case boring is not required, stock heads and retains stock engine height. Kit includes a forged 4.320" big bore forged piston kit, 4.320" big bore cylinders, 2 MLS (Multi-Layer-Steel) .040" head gaskets, 2 cylinder base gaskets, 4 cylinder dowels, exhaust gaskets and an S&S cubic inch cam cover badge. Black powder coated finish to match the OEM finish.
Note: For the 132" kit S&S measured 135.51HP and 145.83 torque with stock heads, a 550 cam, stock throttle body and a high flow Stealth air cleaner kit.
Note: Tuning of fuel injection and ignition may be required.
Note: S&S advises 576972 S&S head bolt kit for all big bore applications.
Note: 136" is not compatible with OEM 4-5/8" stroke flywheels, must use S&S 923270 4-5/8" stroker flywheels.
Note: Not compatible with 107" (4.375" stroke) engines.

S&S, M8 132/136" big bore cylinder & piston kit. HC +8.5cc

#709938

Stock:Yes

High compression.
Black cylinders without highlighted fins.
With +8.5cc piston dome.
Compression ratio 12.7:1 for 132" and 13.1:1 for 136" with stock 88cc heads.
Compression ratio 12.1:1 for 132" and 12.3:1 for 136" with SE Extreme Port 94cc heads.
Largest possible 4.320" bore bolt-in big bore kit.
132" (2162cc) is achieved when used with stock 114" flywheels.
136" (2222cc) is achieved when used with S&S 923270 4-5/8" stroker flywheels.
Works with stock crankcases, case boring is not required, stock heads and retains stock engine height. Kit includes a forged 4.320" big bore forged piston kit, 4.320" big bore cylinders, 2 MLS (Multi-Layer-Steel) .040" head gaskets, 2 cylinder base gaskets, 4 cylinder dowels, exhaust gaskets and an S&S cubic inch cam cover badge. Black powder coated finish to match the OEM finish.
Note: For the 132" kit S&S measured 135.51HP and 145.83 torque with stock heads, a 550 cam, stock throttle body and a high flow Stealth air cleaner kit.
Note: Tuning of fuel injection and ignition may be required.
Note: S&S advises 576972 S&S head bolt kit for all big bore applications.
Note: 136" is not compatible with OEM 4-5/8" stroke flywheels, must use S&S 923270 4-5/8" stroker flywheels.
Note: Not compatible with 107" (4.375" stroke) engines.

S&S, M8 132/136" big bore cylinder & piston kit. HC +8.5cc

#709939

Stock:Yes

High compression.
Black cylinders without highlighted fins.
With 0cc piston dome.
Compression ratio 11.7:1 for 132" and 12.1:1 for 136" with stock 88cc heads.
Compression ratio 11.1:1 for 132" and 11.4:1 for 136" with SE Extreme Port 94cc heads.
Largest possible 4.320" bore bolt-in big bore kit.
132" (2162cc) is achieved when used with stock 114" flywheels.
136" (2222cc) is achieved when used with S&S 923270 4-5/8" stroker flywheels.
Works with stock crankcases, case boring is not required, stock heads and retains stock engine height. Kit includes a forged 4.320" big bore forged piston kit, 4.320" big bore cylinders, 2 MLS (Multi-Layer-Steel) .040" head gaskets, 2 cylinder base gaskets, 4 cylinder dowels, exhaust gaskets and an S&S cubic inch cam cover badge. Black powder coated finish to match the OEM finish.
Note: For the 132" kit S&S measured 135.51HP and 145.83 torque with stock heads, a 550 cam, stock throttle body and a high flow Stealth air cleaner kit.
Note: Tuning of fuel injection and ignition may be required.
Note: S&S advises 576972 S&S head bolt kit for all big bore applications.
Note: 136" is not compatible with OEM 4-5/8" stroke flywheels (121" engines), must use S&S 923270 4-5/8" stroker flywheels.
Note: Not compatible with 107" (4.375" stroke) engines.

S&S, M8 132/136" big bore cylinder & piston kit. HC 0cc

#709936

Stock:Yes

High compression.
Black Granite cylinders with highlighted fins.
With +8.5cc piston dome.
Compression ratio 12.7:1 for 132" and 13.1:1 for 136" with stock 88cc heads.
Compression ratio 12.1:1 for 132" and 12.3:1 for 136" with SE Extreme Port 94cc heads.
Largest possible 4.320" bore bolt-in big bore kit.
132" (2162cc) is achieved when used with stock 114" flywheels.
136" (2222cc) is achieved when used with S&S 923270 4-5/8" stroker flywheels.
Works with stock crankcases, case boring is not required, stock heads and retains stock engine height. Kit includes a forged 4.320" big bore forged piston kit, 4.320" big bore cylinders, 2 MLS (Multi-Layer-Steel) .040" head gaskets, 2 cylinder base gaskets, 4 cylinder dowels, exhaust gaskets and an S&S cubic inch cam cover badge. Black powder coated finish to match the OEM finish.
Note: For the 132" kit S&S measured 135.51HP and 145.83 torque with stock heads, a 550 cam, stock throttle body and a high flow Stealth air cleaner kit.
Note: Tuning of fuel injection and ignition may be required.
Note: S&S advises 576972 S&S head bolt kit for all big bore applications.
Note: 136" is not compatible with OEM 4-5/8" stroke flywheels, must use S&S 923270 4-5/8" stroker flywheels.
Note: Not compatible with 107" (4.375" stroke) engines.

Note: Special Order Product only. To order please contact your MCS sales representative.

S&S, M8 132/136" big bore cylinder & piston kit. HC +8.5cc

#709940

Stock:No

High compression.
Black cylinders with highlighted fins.
With 0cc piston dome.
Compression ratio 11.7:1 for 132" and 12.1:1 for 136" with stock 88cc heads.
Compression ratio 11.1:1 for 132" and 11.4:1 for 136" with SE Extreme Port 94cc heads.
Largest possible 4.320" bore bolt-in big bore kit.
132" (2162cc) is achieved when used with stock 114" flywheels.
136" (2222cc) is achieved when used with S&S 923270 4-5/8" stroker flywheels.
Works with stock crankcases, case boring is not required, stock heads and retains stock engine height. Kit includes a forged 4.320" big bore forged piston kit, 4.320" big bore cylinders, 2 MLS (Multi-Layer-Steel) .040" head gaskets, 2 cylinder base gaskets, 4 cylinder dowels, exhaust gaskets and an S&S cubic inch cam cover badge. Black powder coated finish to match the OEM finish.
Note: For the 132" kit S&S measured 135.51HP and 145.83 torque with stock heads, a 550 cam, stock throttle body and a high flow Stealth air cleaner kit.
Note: Tuning of fuel injection and ignition may be required.
Note: S&S advises 576972 S&S head bolt kit for all big bore applications.
Note: 136" is not compatible with OEM 4-5/8" stroke flywheels, must use S&S 923270 4-5/8" stroker flywheels.
Note: Not compatible with 107" (4.375" stroke) engines.

S&S, M8 132/136" big bore cylinder & piston kit. HC 0cc

#709935

Stock:Yes

This cylinder protection fits the appearance of the BMW optimally and offers protection against stone chips. Made from black powdercoated aluminum and easy installation because it can be mounted to the original mounting points.

Zieger cylinder protector black

#592935

Stock:Yes

This cylinder protection fits the appearance of the BMW optimally and offers protection against stone chips. Made from black powdercoated aluminum and easy installation because it can be mounted to the original mounting points.

Zieger cylinder protector black

#592937

Stock:Yes

This cylinder protection fits the appearance of the BMW optimally and offers protection against stone chips. Made from silver powdercoated aluminum and easy installation because it can be mounted to the original mounting points.

Zieger cylinder protector silver

#592940

Stock:Yes

This cylinder protection fits the appearance of the BMW optimally and offers protection against stone chips. Made from silver powdercoated aluminum and easy installation because it can be mounted to the original mounting points.

Zieger cylinder protector silver

#592938

Stock:Yes

This cylinder protection fits the appearance of the BMW optimally and offers protection against stone chips. Made from silver powdercoated aluminum and easy installation because it can be mounted to the original mounting points.

Zieger cylinder protector silver

#592934

Stock:Yes

This cylinder protection fits the appearance of the BMW optimally and offers protection against stone chips. Made from black powdercoated aluminum and easy installation because it can be mounted to the original mounting points.

Zieger cylinder protector black

#592933

Stock:Yes

This cylinder protection fits the appearance of the BMW optimally and offers protection against stone chips. Made from silver powdercoated aluminum and easy installation because it can be mounted to the original mounting points.

Zieger cylinder protector silver

#592936

Stock:Yes

This cylinder protection fits the appearance of the BMW optimally and offers protection against stone chips. Made from black powdercoated aluminum and easy installation because it can be mounted to the original mounting points.

Zieger cylinder protector black

#592939

Stock:No

Raer gasket. .031" thick fiber, a premium hi-temperature, hi-density creep resistant material that requires no re-torquing, no additional sealants, is fuel resistant and asbestos free. OEM replacement reference 16777-63.

Cometic, cylinder base gasket. Rear. .031" Fiber

#561186

Stock:Yes

Front & rear gasket for one engine. .020" fiber, a premium hi-temperature, hi-density creep resistant material that requires no re-torquing, no additional sealants, is fuel resistant and asbestos free.

Cometic, cylinder base gasket set. Fiber 3-13/16" big bore

#561173

Stock:Yes

Fits front & rear. .012" thick fiber, a premium hi-temperature, hi-density creep resistant material that requires no re-torquing, no additional sealants, is fuel resistant and asbestos free. OEM replacement reference 16774-57.

Cometic, cylinder base gaskets FR/RR. .012" fiber

#561201

Stock:Yes

'Type A' gasket. 3-5/8" big bore copper gasket.
Type A gasket explained: The 'Type A' gasket is the early type introduced on the 1984 Evolution Big Twin models, and can be used on all of the 84-99 Evo Big Twin models and will follow the contoures of the cylinder base perfectly. They will fit 86-22 Evo XL, but stick out at the cylinder base. Both type 'A' and type 'B' have identical inner bore diameter, oil hole and stud hole locations. Gaskets for front & rear cylinder are identical. Only difference between the 'A' & 'B' gaskets is the outside perimeter.

Cometic, cylinder base gasket. .015" copper 3-5/8" bore

#561211

Stock:Yes

Front & rear gasket for one engine. .020" fiber, a premium hi-temperature, hi-density creep resistant material that requires no re-torquing, no additional sealants, is fuel resistant and asbestos free.

Cometic, cylinder base gasket set. Fiber 4" big bore

#561174

Stock:Yes

'Type A' gasket. 3-5/8" big bore copper gasket.
Type A gasket explained: The 'Type A' gasket is the early type introduced on the 1984 Evolution Big Twin models, and can be used on all of the 84-99 Evo Big Twin models and will follow the contoures of the cylinder base perfectly. They will fit 86-22 Evo XL, but stick out at the cylinder base. Both type 'A' and type 'B' have identical inner bore diameter, oil hole and stud hole locations. Gaskets for front & rear cylinder are identical. Only difference between the 'A' & 'B' gaskets is the outside perimeter.

Cometic, cylinder base gasket. .005" copper 3-5/8" bore

#561209

Stock:Yes