The MotoSport.com Sunstar 420 Steel Sprocket And Chain Kit includes ONE Steel Countershaft (Front) Sprocket, ONE Steel Rear Sprocket, and your choice of ONE Premium Drive Chain, each with the following features:
Sprockets / Chainwheels Included:
Sunstar is the largest O.E.M. supplier of sprockets and brake rotors in the world. In fact, your motorcycle probably came from the factory with a Sunstar sprocket. Need a reason to choose Sunstar? Every Sunstar product is imbued with superior quality, uses an exclusive heat-treatment and quenching process, is based on advanced research and design, and is sold at an added value price.
Sunstar Front Sprocket:
- Manufactured from case-hardened chromoly steel for the ultimate in strength and durability.
- "Parkerizing" surface treatment for rust and corrosion resistance.
Sunstar Steel Rear Sprocket:
- Manufactured using only the highest quality 1045 high-carbon steel.
- Exclusive heat treatment for added strength and wear resistance.
- Most are zinc plated and have a baked-on durable paint process for corrosion resistance.
- The strongest, longest lasting steel replacement sprocket available.
Your Choice of Drive Chain:
| Chain | Chain Type | Avg. Tensile Strength | Maximum Rated Displacement | Weight (pounds per 100 links) | Master Link Type |
|---|
| D.I.D 420V O-Ring Chain |
O-Ring |
3,560 pounds |
250cc |
1.60 |
Clip (RJ) |
| RK 420 MXZ Chain |
Non-sealed (standard) |
5,000 pounds |
150cc |
N/A |
Clip |
Note for installing O-ring chains:
As O-ring chains are wider than standard roller chains, when fitting an O-ring chain to a motorcycle that was fitted with a non O-ring chain as original equipment, it is essential to check that there is proper clearance of the engine cases near the countershaft sprocket and any other places of close contact. Failure to do so could result in damage to the chain and motorcycle and could ultimately cause the chain to fail.
Note:
Image is for reference ONLY, actual product will vary based on fitment and selection.
Some Helpful Tools:
Try the Motion Pro Chain Breaker & Riveting Tool or BikeMaster's Heavy-Duty Chain Breaker & Rivet Tool to make removing your old chain and installing your new chain as easy and painless as possible.
D.I.D 420V O-Ring Chain:
D.I.D's top quality O-Ring chains are quad stake riveted with solid bushings for superior strength and long life.
- High-performance value of an O-ring chain.
- Average tensile strength of 3,560 pounds.
- Wear life index: 700.
- Ideal for offroad motorcycles up to 250cc.
- Weight (per 100 links): 1.60 pounds.
- Includes a clip-style (RJ) master link.
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RK 420 MXZ Chain:
High-quality pins, bushings and rollers for maximum durability.
- All pins are four-point riveted.
- Longer wear life than RK standard chain.
- Maximum tensile strength of 5,000 pounds.
- Suitable for 150cc maximum street displacement or 125cc maximum off-road use.
- Includes clip master link.
- Note: Non-sealed chains require more regular maintenance than sealed (O-ring, X-ring) versions and are mainly recommended for off-road use.
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