Product categories Sprockets

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.

Add to cart Details
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.

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

Full Product Description

The Amp 520SS13HT-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 seeking increased top speed while maintaining the strength and reliability required for high-power electric motorcycle applications.

Constructed from hardened steel and manufactured to strict tolerances, this sprocket is designed to withstand the demands of high-performance electric motorcycles, karts, ATVs, and custom vehicle projects.

The 13-tooth configuration is ideal for riders looking to reduce motor RPM at cruising speeds and increase vehicle top speed while still maintaining strong acceleration characteristics. It is particularly popular for street-focused builds and higher-speed applications.

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

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

Add to cart Details
Amp 520SS12HT-23/20

Rated 5.00 out of 5

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.
Add to cart Details
Out of stock
Amp 520SS12HT-17/14

FITS QS Motor 138 70H V3, QS Motor 138 90H V3
$38.00
Temporarily out of stock. New inventory is expected around October 16, 2026. Check back soon for availability. High Torque 520 12T Racing Sprocket Designed specifically for QS 138 70H V3 and QS 138 90H 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 and 90H V3 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: 16.9mm

Narrowest inner spline diameter: 14.3mm

This is a press-fit sprocket and must be tapped into place using a mallet and a block of wood. 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.
Details
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.

Add to cart Details
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.

Add to cart Details
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.

Add to cart Details
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.

Add to cart Details
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.

Add to cart Details
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.

Add to cart Details
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.

Add to cart Details
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.

Add to cart Details

Full Product Description