• Amp 520TS10HT-90H Amp 520TS10HT-90H

    Amp 520TS10HT-90H

    FITS QS 138 90H

    $42.00

    High performance sprocket made specifically to fit the tapered shaft QS Motor 138 4000W 90H Motor. Sprocket comes complete with 5mm key bar. This sprocket works well with 520 standard and O-ring chains.

    This sprocket fits the tapered shaft version of the QS 138 90H motor.

    Tapered bore dimensions: 21.15mm diameter to 24.5mm 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 it is recommended to use a bushing between the sprocket and bearing race, use thread lock on shaft nut and tighten shaft nut to no more than 3 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 520SS14HT-17/14 14-tooth sprocket front and back Amp 520SS14HT-17/14 14-tooth racing sprocket

    Amp 520SS14HT-17/14

    FITS QS Motor 138 70H V3

    $38.00
    High Torque 520 14T Racing Sprocket Designed specifically for QS 138 70H V3 geared motors. Constructed from hardened steel for maximum durability and galvanized in silver to resist corrosion. IMPORTANT FITMENT NOTICE: This sprocket is engineered for use with QS 138 70H geared motors only. Before ordering, please measure your motor shaft carefully to confirm compatibility. The spline profile of this sprocket is as follows:
    • Widest inner spline diameter: 17.09mm
    • Narrowest inner spline diameter: 14.02mm
    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 goes through quality control checks on the production line. If you experience difficulty during installation, it may be due to minor inconsistencies in QS motor shaft dimensions, which can vary slightly between manufacturing batches.
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  • Amp 520SS13HT-17/14 13-tooth sprocket front and back Amp 520SS13HT-17/14 13-tooth racing sprocket

    Amp 520SS13HT-17/14

    FITS QS Motor 138 70H V3

    $38.00
    High Torque 520 13T Racing Sprocket Designed specifically for QS 138 70H V3 geared motors. Constructed from hardened steel for maximum durability and galvanized in silver to resist corrosion. IMPORTANT FITMENT NOTICE: This sprocket is engineered for use with QS 138 70H geared motors only. Before ordering, please measure your motor shaft carefully to confirm compatibility. The spline profile of this sprocket is as follows:
    • Widest inner spline diameter: 17.09mm
    • Narrowest inner spline diameter: 14.02mm
    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 goes through quality control checks on the production line. If you experience difficulty during installation, it may be due to minor inconsistencies in QS motor shaft dimensions, which can vary slightly between manufacturing batches.
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  • Amp 520SS11HT-16/20 Amp 520SS13HT-16/20 sprocket for QS165 60H V3

    Amp 520SS13HT-16/20

    FITS QS Motor QS 165 60H V3

    $36.00

    High Torque 520 13T Racing Sprocket

    Designed specifically for the QS165 60H v3 gearbox motor with the newer 16/20 mm 6-spline output shaft. Precision-machined from hardened steel for durability in high-torque electric motorcycle, kart, and ATV applications.

    Installs directly on the QS165 shaft without a locking plate or mounting bolts.

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  • Amp 520SS12HT-23/20 Amp 520SS12HT-23/20

    Amp 520SS12HT-23/20

    FITS 2019-2020 Honda CRF450L, 2019-2023 Honda CRF450X, 2021-2023 Honda CRF450RL, Golden Hypertorque HTM11KW

    $38.00

    Amp 520SS12HT-23/20 - High Torque 520 12T Racing Sprocket for Golden Hypertorque & Honda CRF450L Series

    PLEASE NOTE: This sprocket does fit the Honda CRF450L spline BUT it may cause chain rub on the motor casing. Please be aware that using this 12t sprocket on the CRF450 series bikes may require case modifications. 

    Upgrade your ride with the Amp 520SS12HT-23/20, a high-performance 12-tooth 520 racing sprocket engineered for maximum torque and acceleration. Designed specifically for the Golden Hypertorque motor and Honda CRF450L, CRF450X, and CRF450RL motorcycles, this sprocket is built to deliver unmatched durability and performance on the track, trails, and hills.

    Key Features:

    • Precision Engineered for Power – Optimized tooth design enhances torque delivery, improving acceleration and hill-climbing ability.
    • Hardened Steel Construction – Built for maximum durability, resisting wear and deformation under high-stress riding conditions.
    • Galvanized Silver Coating – Corrosion-resistant finish ensures long-lasting performance in all weather conditions.
    • Integrated Rubber Dampener – Reduces chain noise for a smoother, quieter ride.
    • Perfect Fit for Honda CRF450 Series – Specifically designed to fit the CRF450L, CRF450X, and CRF450RL models.

    Compatible Honda Models:

    • 2019-2020 Honda CRF450L
    • 2021-2023 Honda CRF450RL
    • 2019-2023 Honda CRF450X

    This heavy-duty racing sprocket is the perfect upgrade for riders looking for more torque, better acceleration, and improved chain noise reduction. Whether you ride a Honda CRF450L, CRF450X, or CRF450RL, or you have the Golden Hypertorque motor, this sprocket delivers reliable performance for demanding terrain.

     

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  • Amp 520SS12HT-17/14 Amp 520SS12HT-17/14

    Amp 520SS12HT-17/14

    FITS QS Motor 138 70H V3

    $38.00
    High Torque 520 12T Racing Sprocket Designed specifically for QS 138 70H V3 geared motors. Constructed from hardened steel for maximum durability and galvanized in silver to resist corrosion. IMPORTANT FITMENT NOTICE: This sprocket is engineered for use with QS 138 70H geared motors only. Before ordering, please measure your motor shaft carefully to confirm compatibility. The spline profile of this sprocket is as follows:
    • Widest inner spline diameter: 17.09mm
    • Narrowest inner spline diameter: 14.02mm
    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 goes through quality control checks on the production line. If you experience difficulty during installation, it may be due to minor inconsistencies in QS motor shaft dimensions, which can vary slightly between manufacturing batches.
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  • Amp 520SS11HT-16/20 Amp 520SS12HT-16/20 sprocket for QS165 60H V3

    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. Precision-machined from hardened steel for durability in high-torque electric motorcycle, kart, and ATV applications.

    Installs directly on the QS165 shaft without a locking plate or mounting bolts.

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  • Amp 520SS11HT-16/20 Amp 520SS11HT-16/20 sprocket for QS165 60H V3

    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. Precision-machined from hardened steel for durability in high-torque electric motorcycle, kart, and ATV applications.

    Installs directly on the QS165 shaft without a locking plate or mounting bolts.

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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 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 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-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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