• Amp 420SS10HT-16/20 Amp 420SS10HT-16/20

    Amp 420SS10HT-16/20

    FITS QS Motor 138 3000W 70H V2

    $20.00

    ATTENTION: This sprocket is for QS 138 70H motors that were made in 2020 and early 2021. Please measure your QS 138 70H motor shaft before ordering this sprocket. This sprocket is 16mm diameter measuring from inner diameter of shaft and 20mm measuring the outer diameter of the shaft. Please also check the sprocket drawing in the images to insure that the spline width is accurate to your motor shaft. QS is notorious for changing their shaft sizes so please note that AmpSprockets cannot be responsible for returns if you order the wrong size for your motor.

    High performance sprocket made specifically to fit the spline shaft QS Motor 138 3000W 70H V2 Motor. Sprocket comes complete with ring retainer clip. This sprocket works well with 420 standard and O-ring chains.

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  • Amp 420TS10HT

    Amp 420TS10HT

    FITS QS90 1000W

    $36.00

    High performance sprocket made specifically to fit the tapered shaft QS Motor QS90 1000W Motor. Sprocket comes complete with 5mm key bar. This sprocket works well with 420 standard and O-ring chains.

    This sprocket fits the tapered shaft version of the QS90 1000W motor.

    Tapered bore dimensions: 14.2mm diameter to 16.5mm diameter
    Keybar width: 5mm

    IMPORTANT (Instructions for Installation):
    When attaching this sprocket to the tapered shaft DO NOT torque down the shaft nut with excessive force. Over torquing the shaft nut on the sprocket could cause the sprocket to crack due to over expansion down the tapered shaft. Fitment of the sprocket and shaft nut should just be snug. For best fitment use thread lock on shaft nut and tighten shaft nut to no more than 10 ft/lbs of torque. Amp Sprockets can NOT be held responsible for any sprockets that have cracked due to over torquing on tapered shafts during installation.

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  • Amp 428BS11HT-20

    Amp 428BS11HT-20

    FITS Golden Motor 3KW BLDC

    $36.00

    High performance sprocket made specifically to fit the Golden Motor 3KW BLDC.
    Sprocket comes complete with key bar and stainless steel set screws.
    PLEASE NOTE: This sprocket fits standard and o-ring/x-ring 428 chains.

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  • Amp 428BS11HT-7/8 Amp 428BS11HT-7/8

    Amp 428BS11HT-7/8

    FITS ME1716, ME1718, Golden Motor 5KW BLDC, ME1003, ME0909, ME1304, ME1616, ME0709

    $36.00

    This sprocket is made to fit Motenergy ME1716, ME1718, ME1304, ME1117, ME1616, ME0709, Golden Motor 5KW BLDC & more. Sprocket comes complete with keybar and stainless steel set screws. This sprocket will fit any Motenergy motor with 7/8" shaft and 3/16" key way.

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  • Amp 520BS10HT-1 (8mm Key) Amp 428BS12HT-1 (8mm Key)

    Amp 428BS12HT-1 (8mm Key)

    FITS Golden Motor 10KW BLDC

    $36.00

    Amp 428BS12HT-1 (8mm Key) for 2020 and newer Golden Motor 10KW BLDC

    High performance sprocket made specifically to fit the newest Golden Motor 10KW BLDC with 8mm key way. Sprocket comes complete with key bar and stainless steel set screws. This sprocket works well with 428 standard and O-ring chains.

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  • Amp 520BS11HT-1 1/8 Amp 428BS13HT-1 1/8

    Amp 428BS13HT-1 1/8

    FITS ME1905, ME1507

    $36.00

    Sprocket for Motenergy ME1905 and ME1507 motor.
    This sprocket comes complete with keybar and stainless steel set screws.
    PLEASE NOTE: This sprocket is best fitted for standard 428 chains. Some o-ring or x-ring chains may exceed the allowable width of the inset channel adjacent to the sprocket teeth.

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  • Amp 520BS10HT-1 (1/4" Key)

    Amp 520BS10HT-1 (1/4″ Key)

    FITS Golden Motor 10KW BLDC

    $30.00

    ATTN: Golden Motor has just recently changed the size of the 10Kw BLDC motor keyway to 8mm. This sprocket will fit the previous 1/4" keyway version of the 10kw motor, not the newer 8mm keyway version.

    High performance sprocket made specifically to fit the Golden Motor 10KW BLDC.
    Sprocket comes complete with keybar and stainless steel keybar.
    PLEASE NOTE: This sprocket is best fitted for standard 520 chains. Some o-ring or x-ring chains may exceed the allowable width of the inset channel adjacent to the sprocket teeth.

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  • Amp 520BS10HT-1 (8mm Key) Amp 520BS10HT-1 (8mm Key)

    Amp 520BS10HT-1 (8mm Key)

    FITS Golden Motor 10KW BLDC

    $36.00

    Amp 520BS10HT-1 (8mm Key) for 2020 and newer Golden Motor 10KW BLDC

    High performance sprocket made specifically to fit the newest Golden Motor 10KW BLDC with 8mm key way. Sprocket comes complete with key bar and stainless steel set screws. This sprocket works well with 520 standard and O-ring chains.

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  • Amp 520BS10HT-7/8 Amp 520BS10HT-7/8

    Amp 520BS10HT-7/8

    FITS ME1716, ME1718, Golden Motor 5KW BLDC, ME1003, ME0909, ME1304, ME1616, ME0709

    $36.00

    This sprocket is made to fit Motenergy ME1716, ME1718, ME1304, Golden Motor 5KW BLDC & several more Motenergy motors.
    Sprocket comes complete with keybar and stainless steel set screws.
    PLEASE NOTE: This sprocket fits standard, o-ring and x-ring chains.

    This sprocket will fit any Motenergy motor with 7/8" shaft and 3/16" key way.
     

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  • Amp 520BS11HT-1 1/8 Amp 520BS11HT-1 1/8

    Amp 520BS11HT-1 1/8

    FITS ME1905, ME1507

    $36.00

    High performance sprocket made specifically to fit the Motenergy ME1905 and ME1507 motor.
    Sprocket comes complete with keybar and stainless steel set screws.
    PLEASE NOTE: This sprocket is best fitted for standard 520 chains. Some o-ring or x-ring chains may exceed the allowable width of the inset channel adjacent to the sprocket teeth.

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  • Amp 520SS11HT-16/20 Amp 520SS11HT-16/20

    Amp 520SS11HT-16/20

    FITS QS Motor QS 165 60H V3

    $36.00

    High Torque 520 11T Racing Sprocket

    Designed specifically for the QS165 60H v3 gearbox motor with the newer 16/20 mm 6-spline output shaft.

    Constructed from hardened steel for maximum durability and engineered for high-power electric motorcycle, kart, and ATV applications.

    IMPORTANT FITMENT NOTICE:

    This sprocket is engineered for use with QS165 60H v3 motors utilizing the newer 16/20 mm 6-spline output shaft.

    Before ordering, please verify that your motor uses the 16/20 mm 6-spline shaft configuration.

    The spline profile of this sprocket is as follows:

    Widest spline diameter: 20.0mm

    Narrowest spline diameter: 16.0mm

    Each sprocket includes a retaining plate and mounting hardware.

    We test-fit each design to actual QS motors during production to ensure the best possible fitment. Every sprocket is manufactured with strict tolerances and undergoes quality control inspection prior to shipment.

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  • Amp 520SS11HT-16/20 Amp 520SS12HT-16/20

    Amp 520SS12HT-16/20

    FITS QS Motor QS 165 60H V3

    $36.00

    High Torque 520 12T Racing Sprocket

    Designed specifically for the QS165 60H v3 gearbox motor with the newer 16/20 mm 6-spline output shaft.

    Constructed from hardened steel for maximum durability and engineered for high-power electric motorcycle, kart, and ATV applications.

    The Amp 520SS12HT-16/20 was developed specifically for the QS165 60H v3 gearbox motor utilizing the newer 16/20 mm 6-spline output shaft. This precision CNC-machined sprocket provides a direct-fit solution for riders looking for a high-quality alternative to factory sprockets.

    Constructed from hardened steel and manufactured to strict tolerances, this sprocket is designed to withstand the demands of high-power electric motorcycle applications while providing long service life and reliable performance.

    The 12-tooth configuration offers an excellent balance between acceleration and top speed, making it a popular choice for full-size electric dirt bike conversions and general-purpose riding.

    Each sprocket includes the retaining plate and mounting hardware required for installation.

    Developed based on direct feedback from the Electric Motorcycle Builds community.

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