Engine

Koso BG302010 - Oil Adapter - M20X1.0X15

Aluminum washer included Sensor not included

Koso MB623002 - Big Bore Cylinder Kit

Includes ceramic coated cylinder, 61 mm forged piston, rings, pin, gasket kit and banjo bolts Compression ratio of 11.5 to 1 Optional camshaft kit can be used with stock engine, but delivers improved results when used with 170cc Big Bore kit

Koso MB623003 - Valve Head Kit - Big Bore - Grom

Ideal engine part to complete Koso's big bore kit Unique four-valve design increases air flow and performance Provides more power and torque Features a forged piston, stainless steel 24 mm intake valves and 20 mm exhaust valves

Koso MC623000 - Valve Head Kit - Grom

Ideal engine part to complete Koso's big bore kit Unique four-valve design increases air flow and performance Provides more power and torque Features a forged piston, stainless steel 24 mm intake valves and 20 mm exhaust valves

Koso MD623000 - Piston - Big Bore - Grom

Compression ratio of 11.5 to 1

Koso MM623002 - Camshaft - Big Bore Kit

Optional camshaft kit can be used with stock engine, but delivers improved results when used with 170cc Big Bore kit

Koso MO623100 - Banjo Bolt Kit - Big Bore - Grom

Optional camshaft kit can be used with stock engine, but delivers improved results when used with 170cc Big Bore kit Banjo bolt kit designed for 170cc big bore kit Includes ceramic coated cylinder, 61mm forged piston, rings, pin, gasket kit and banjo...

Koso MU623000 - Cam Chain Tensioner

Arm made of 6061 aluminum, wheel made of structured steel Long lasting OEM replacement

Koso NF623000 - Hi Flow Oil Pump - Grom

Increases the oil flow by 40%, helping to prevent engine failure Keeps the engine lubricated to optimize performance Recommended for bikes with upgraded engines using the Koso North America 170cc Big Bore kit and 4V cylinder head (sold separately)

Lower Collar - .725" - Big Twin

FeaturesMade of heat-treated steelMachined to fit .725" seal and .565" valve guideLower collar is counter bored to allow for greater retainer-to-seal clearanceMade in the U.S.A.Specs Application: Exhaust Inside Diameter: 0.725" Type: Valve Application:...

Lunati 20300700 - Cam Harley 84-99 V281hr03 Harley Big Twin Evolution

Voodoo Camshafts for Harley Davidson applications deliver more area under the curve than any other series of cams for these engines. This means more throttle response, quicker acceleration, more vacuum and better efficiency. These factors, combined with...

Lunati 20300701 - Cam Harley 84-99 V285hr03 Harley Big Twin Evolution

Voodoo Camshafts for Harley Davidson applications deliver more area under the curve than any other series of cams for these engines. This means more throttle response, quicker acceleration, more vacuum and better efficiency. These factors, combined with...

Lunati 20300702 - Cam Harley 84-99 V289hr03 Harley Big Twin Evolution

Voodoo Camshafts for Harley Davidson applications deliver more area under the curve than any other series of cams for these engines. This means more throttle response, quicker acceleration, more vacuum and better efficiency. These factors, combined with...

Lunati 20300703 - Cam Harley 84-99 V293hr03 Harley Big Twin Evolution

Voodoo Camshafts for Harley Davidson applications deliver more area under the curve than any other series of cams for these engines. This means more throttle response, quicker acceleration, more vacuum and better efficiency. These factors, combined with...

Lunati 20300704 - Cam Harley 84-99 V297hr07 Harley Big Twin Evolution

Voodoo Camshafts for Harley Davidson applications deliver more area under the curve than any other series of cams for these engines. This means more throttle response, quicker acceleration, more vacuum and better efficiency. These factors, combined with...

Lunati 20300705 - Cam Harley 84-99 V301hr07 Harley Big Twin Evolution

Voodoo Camshafts for Harley Davidson applications deliver more area under the curve than any other series of cams for these engines. This means more throttle response, quicker acceleration, more vacuum and better efficiency. These factors, combined with...

Lunati 20300706 - Cam Harley 84-99 Evo Harley Big Twin Evolution

Voodoo Camshafts for Harley Davidson applications deliver more area under the curve than any other series of cams for these engines. This means more throttle response, quicker acceleration, more vacuum and better efficiency. These factors, combined with...

Lunati 21740700 - Cam Set Early Twin V281hr03 Harley Twin Except 06 Dyna

Voodoo Camshafts for Harley Davidson applications deliver more area under the curve than any other series of cams for these engines. This means more throttle response, quicker acceleration, more vacuum and better efficiency. These factors, combined with...

Lunati 21740700LK - Cam And Lifter Kit V281hr03 Hd Early Twin Cam

Cam and Lifter Kits include the camshaft of choice with the matching replacement lifters recommended by Lunati. High RPM or stock replacement type lifters also available separately.Not legal for use on pollution controlled vehicles, check local laws...

Lunati 21740702 - Cam Set Early Twin V289hr05 Harley Twin Except 06 Dyna

Voodoo Camshafts for Harley Davidson applications deliver more area under the curve than any other series of cams for these engines. This means more throttle response, quicker acceleration, more vacuum and better efficiency. These factors, combined with...

Lunati 21740702LK - Cam And Lifter Kit V289hr05 Hd Early Twin Cam

Cam and Lifter Kits include the camshaft of choice with the matching replacement lifters recommended by Lunati. High RPM or stock replacement type lifters also available separately.Not legal for use on pollution controlled vehicles, check local laws...

Lunati 21740704 - Cam Set Early Twin V293hr07 Harley Twin Except 06 Dyna

Voodoo Camshafts for Harley Davidson applications deliver more area under the curve than any other series of cams for these engines. This means more throttle response, quicker acceleration, more vacuum and better efficiency. These factors, combined with...

Lunati 21740704LK - Cam And Lifter Kit V293hr07 Hd Early Twin Cam

Cam and Lifter Kits include the camshaft of choice with the matching replacement lifters recommended by Lunati. High RPM or stock replacement type lifters also available separately.Not legal for use on pollution controlled vehicles, check local laws...

Lunati 21740710 - Cam Set Early Twin V293hr05 Harley Twin Except 06 Dyna

Voodoo Camshafts for Harley Davidson applications deliver more area under the curve than any other series of cams for these engines. This means more throttle response, quicker acceleration, more vacuum and better efficiency. These factors, combined with...