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Renthal Sprocket - 40 Tooth - 525 Pitch - Gold

Renthal Sprocket - 40 Tooth - 525 Pitch - Gold

Precision CNC machined to extremely tight tolerance from high strength 7075 T651 aluminium alloy, ...

Best current price£53.95from Demon Tweeks

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Product Information

Full details

This guide is for motorcycle riders seeking enhanced performance and durability. The Renthal 40-tooth, 525-pitch, gold rear sprocket offers a significant weight saving and improved power transfer due to its precision CNC machining from high-strength aluminum alloy. A key caveat is that its alloy construction requires more frequent maintenance than steel sprockets to ensure longevity.

All features

ColourGold
Model Part Number211-525-40HA
BrandRenthal

Extended Product Information

FAQs

What is the main advantage of this aluminum sprocket over a steel one?

The primary advantage is a significant weight saving (up to 66%), which reduces rotational mass. This leads to improved acceleration, braking, and overall handling characteristics of the motorcycle.

How often should I clean and lubricate this sprocket?

Due to its aluminum alloy construction, it requires more frequent maintenance. Clean and lubricate after every few rides, especially after riding in adverse conditions. Refer to the 'Care' section for detailed instructions.

Will this sprocket fit my motorcycle?

This specific sprocket is a 40-tooth, 525-pitch model. You must verify that this pitch and tooth count are compatible with your motorcycle's chain and desired gearing. Always check your motorcycle's specifications or consult a professional.

What does '525 Pitch' mean?

Pitch refers to the distance between the rollers of a chain, and consequently, the spacing of the teeth on the sprocket. A 525 pitch is a specific standard size for motorcycle chains and sprockets. Using the wrong pitch will result in poor fit and performance.

How does the aluminum alloy perform under racing conditions?

The high-strength 7075 T651 aluminum alloy is chosen for its excellent wear resistance and high tensile strength, making it suitable for the demands of racing. However, consistent maintenance is crucial for maximizing its lifespan.

Can I mix this sprocket with a steel front sprocket?

While possible, it is generally recommended to replace both front and rear sprockets and the chain as a set for optimal performance and longevity. Mixing materials can sometimes lead to uneven wear patterns.

What is the expected lifespan of this sprocket?

The lifespan depends heavily on riding conditions, maintenance frequency, and riding style. Properly maintained, it offers good longevity, but aluminum sprockets typically have a shorter lifespan than steel counterparts under similar conditions.

Troubleshooting

Chain slips on sprocket

Check chain tension and ensure it is within the manufacturer's specifications. Inspect both the chain and sprocket for excessive wear. Ensure the sprocket is correctly installed and torqued.

Excessive sprocket wear

Ensure proper chain lubrication and cleaning. Verify that the chain pitch and sprocket pitch match exactly. Check for chain misalignment or damage to the sprocket teeth.

Noise from drivetrain

Inspect chain and sprocket for debris or damage. Ensure the chain is properly lubricated. Check chain tension; too loose or too tight can cause noise. Verify sprocket mounting security.

Difficulty fitting sprocket

Confirm that the sprocket's pitch and bore size are correct for your motorcycle hub. Ensure no debris is present on the hub or sprocket mounting surface. Consult a professional mechanic if unsure.

Pros and Cons

Pros

  • Significant weight reduction improves acceleration and handling.
  • High tensile strength aluminum alloy offers excellent durability.
  • Precision manufacturing ensures optimal fit and performance.
  • Advanced tooth profile maximizes power transfer.
  • Lightweight nature reduces rotational mass, benefiting braking.

Cons

  • Aluminum alloy sprockets generally require more frequent cleaning and lubrication than steel.
  • May wear faster than steel sprockets under extreme conditions if not properly maintained.
  • Higher initial cost compared to standard steel sprockets.
  • Specific pitch (525) and tooth count (40) may not be suitable for all motorcycle gearing setups.
  • Requires proper chain alignment for optimal longevity.

Setup, Compatibility & Care

Compatibility: This specific sprocket has a 525 pitch and 40 teeth. Ensure this matches your motorcycle's chain size and desired gearing ratio. Always verify fitment for your specific make and model before purchase. Consult your motorcycle's service manual or a qualified mechanic if unsure.

Installation: Installation should be performed by a qualified mechanic. Key steps include removing the old sprocket, cleaning the mounting hub, and installing the new sprocket using appropriate torque specifications for the fasteners. Ensure correct chain alignment and tension after installation.

Care: Due to its aluminum alloy construction, this sprocket requires diligent maintenance.

  1. Regular Cleaning: Clean the sprocket and chain thoroughly after every few rides, or more frequently in wet or dusty conditions. Use a dedicated chain cleaner and a soft brush.
  2. Lubrication: Apply a high-quality chain lubricant after cleaning and ensure it penetrates the chain rollers. Reapply lubricant at recommended intervals, typically every 300-500 miles, or after riding in rain.
  3. Inspection: Periodically inspect the sprocket teeth for wear and the chain for any signs of damage or excessive slack. Replace both the chain and sprockets as a set when wear is significant to prevent premature failure of new components.

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