JT Sprocket - 15T
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Product Information
Full details
The JT Sprocket 15T is designed for motorcycle enthusiasts and mechanics seeking a high-performance, durable replacement for their drivetrain system. Engineered with high-grade steel alloys and computer-aided design, this sprocket provides an ideal balance of strength and weight reduction for enhanced power transfer; however, users should be aware that installing a sprocket size different from the original equipment manufacturer (OEM) specifications requires verifying chain clearance and potential speedometer adjustments.
All features
| Model Part Number | 12121230 |
|---|---|
| Brand | JT |
Extended Product Information
FAQs
Does this sprocket come with a retaining clip?
The sprocket package typically contains the component itself; please reuse your existing retaining hardware unless it shows signs of wear.
Can I use this on any motorcycle?
No, this sprocket is model-specific. Always check your motorcycle's service manual or a fitment guide to confirm compatibility with your specific year, make, and model.
How often should I replace my front sprocket?
It is recommended to replace the front sprocket whenever you replace your chain, or if the teeth show signs of hooking or rounding.
Do I need to change my chain if I change the sprocket tooth count?
If the tooth count differs from the stock specification, your existing chain may be too short or too long. Always verify chain length requirements for custom gearing.
What is the benefit of bead-blasting the sprocket?
Bead-blasting minimizes surface tension on the metal, which helps improve the overall structural integrity and durability of the sprocket.
Troubleshooting
Increased drivetrain noise after installation
Check chain alignment and ensure the chain is not over-tightened; verify that the sprocket is seated fully on the splines.
Sprocket teeth showing premature wear
Ensure the drive chain is not stretched beyond service limits and that it is properly lubricated.
Clearance issues with engine casing
If the 15T size differs from your OEM sprocket, verify there is sufficient physical clearance before operating the vehicle.
Pros and Cons
Pros
- Superior strength-to-weight ratio for better acceleration
- Reduced drivetrain noise and vibration during operation
- High-grade steel alloy construction ensures long-lasting durability
- Meets or exceeds motorcycle industry quality standards
Cons
- Changing tooth count from OEM requires manual adjustment of chain length
- Not compatible with all motorcycle models; check fitment before purchase
- May require speedometer recalibration if gear ratio is altered
Setup, Compatibility & Care
Before installation, ensure the vehicle is secured on a paddock stand. Remove the countershaft sprocket cover to expose the old sprocket. When installing the JT 15T, ensure the flat side is oriented correctly according to your motorcycle service manual. Always clean the output shaft splines thoroughly and apply a light coat of high-pressure grease before sliding the new sprocket into place. Compatibility is critical: if you select a sprocket size different from your original, you must check for proper clearance between the sprocket and the engine casing, as well as ensure your drive chain has sufficient slack and adjustment room. Regularly inspect the teeth for 'hooking' or wear every 3,000 miles and maintain proper chain lubrication to prolong the life of both the sprocket and the chain.