Introduction
This manual provides essential information for the installation, operation, and maintenance of your new ATV & UTV sprocket set, Model-GHZ59-F6265. This set is designed as a replacement for 1987-2003 Honda CR125 R 125 models, featuring a 13-tooth front sprocket and a 49-tooth rear sprocket. Please read this manual thoroughly before beginning any installation or maintenance procedures to ensure proper function and safety.
Product Overview
Figure 1: The sprocket set includes one silver rear sprocket with 49 teeth and one black front sprocket with 13 teeth, designed for optimal power transfer in ATV and UTV applications.
The sprocket set consists of two primary components: a front drive sprocket and a rear driven sprocket. Both are manufactured from high-quality steel to ensure durability and resistance to wear under demanding conditions. The precise tooth count and fit are engineered to meet or exceed OEM specifications for the specified Honda CR125 R 125 models.
Setup and Installation
Proper installation is crucial for the performance and longevity of your sprocket set. If you are unsure about any step, it is recommended to seek professional assistance.
Required Tools:
- Socket Wrench Set
- Torque Wrench
- Chain Breaker/Rivet Tool (if replacing chain)
- Sprocket Holding Tool
- Degreaser and Clean Cloths
- New Chain (recommended for new sprockets)
Installation Steps:
- Prepare the Vehicle: Park the ATV/UTV on a stable, level surface. Ensure the engine is off and the vehicle is secure. Lift the rear wheel off the ground using a stand if necessary.
- Remove Old Components:
- Loosen the rear axle nut and chain adjusters.
- Break the old chain using a chain breaker tool.
- Remove the old front sprocket cover and then the front sprocket retaining nut/clip. Carefully slide off the old front sprocket.
- Remove the rear wheel. Unbolt and remove the old rear sprocket from the wheel hub.
- Clean Mounting Surfaces: Thoroughly clean the front sprocket shaft and the rear wheel hub mounting surface to remove any dirt, grease, or old threadlocker.
- Install New Rear Sprocket: Align the new 49-tooth rear sprocket with the bolt holes on the wheel hub. Secure it with the appropriate bolts and nuts. Torque these bolts to the manufacturer's specified values.
- Install New Front Sprocket: Slide the new 13-tooth front sprocket onto the output shaft. Ensure it is correctly seated and secure it with the retaining nut/clip. Torque the front sprocket nut to the manufacturer's specified values.
- Install New Chain: Route the new chain around both the front and rear sprockets. Connect the chain ends using the master link, ensuring it is properly secured (clip facing direction of rotation).
- Adjust Chain Tension: Reinstall the rear wheel. Adjust the chain tension according to your vehicle's service manual specifications. There should be a small amount of slack, typically 1-1.5 inches, but refer to your vehicle's manual for exact measurements.
- Final Checks: Rotate the wheel manually to ensure the chain runs smoothly and does not bind. Double-check all nuts and bolts for proper torque. Reinstall any covers removed during the process.
Operating Considerations
Once installed, the new sprocket set will affect the vehicle's gearing. A 13-tooth front and 49-tooth rear combination typically provides a balance of acceleration and top speed for off-road riding. Be aware of the following:
- Break-in Period: Allow a short break-in period (e.g., 50-100 miles) for the new sprockets and chain to seat properly. Avoid aggressive riding during this time.
- Performance Change: Changes in sprocket sizes directly impact the final drive ratio. This specific combination is designed to maintain a balanced performance profile for the Honda CR125 R 125.
- Noise: A slight increase in chain noise might be observed initially as components wear in. Excessive noise or grinding indicates a potential issue.
Maintenance
Regular maintenance extends the life of your sprocket set and ensures safe operation.
Routine Checks:
- Chain Tension: Check chain tension before each ride and adjust as necessary. Incorrect tension can lead to premature wear of sprockets and chain.
- Lubrication: Lubricate the chain regularly with a high-quality chain lubricant, especially after riding in wet or dusty conditions. This protects both the chain and sprockets.
- Cleaning: Periodically clean the chain and sprockets to remove dirt, mud, and old lubricant buildup. Use a degreaser and brush, then rinse and re-lubricate.
- Wear Inspection: Inspect sprocket teeth for signs of wear (hooking, thinning, or sharp points) and damage (bent or broken teeth). Replace sprockets if significant wear is observed. It is recommended to replace both front and rear sprockets, and the chain, as a set.
- Fastener Torque: Periodically check the torque of all sprocket mounting bolts and nuts to ensure they remain secure.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Excessive Chain Noise |
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| Premature Sprocket Wear |
|
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| Chain Derailment |
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|
Specifications
- Product Model: Model-GHZ59-F6265
- Compatibility: 1987-2003 Honda CR125 R 125
- Front Sprocket Teeth: 13T
- Rear Sprocket Teeth: 49T
- Material: High-Quality Steel
- Manufacturer: R-D (as per product data)
- Brand: Generic
Warranty Information
This product is covered by the manufacturer's standard warranty against defects in materials and workmanship. For specific warranty terms and conditions, please refer to the documentation provided with your purchase or contact the seller directly. The warranty typically covers manufacturing defects but does not cover wear and tear, improper installation, or damage due to misuse or neglect.
Support and Contact
For technical assistance, installation queries, or warranty claims, please contact your original point of purchase or the product manufacturer. When contacting support, please have your product model number (Model-GHZ59-F6265) and purchase details readily available.
For general inquiries, you may refer to the product listing page on Amazon.com.
