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  • To finish first, you first must finish.

    MVP in ATV - Blog

    We can’t think of too many things more exciting than the action of wheel-to-wheel ATV racing. And maybe that’s because we put so much into helping top racers get all that dirt-pounding ATV power to the ground. Check out why Sunstar has become an MVP in the world of ATVs.

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  • Meet the unsung hero of your bike’s drivetrain.


    Let’s face it. A bike’s rear sprocket gets the bulk of the love and attention. Maybe that’s because it’s right out there in the open where everyone can see it. Perhaps it’s because it’s large and in charge of spinning that rear wheel and converting all that engine torque into forward motion where the rubber meets to road. Or the dirt. But your bike’s drivetrain has another rock star that is often overlooked and really deserves some of the spotlight: the countershaft sprocket.

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  • Having the mettle to choose the right metal.


    Okay, you’ve clocked thousands of miles on your road bike. Maybe even some hard miles. And now it’s clearly time to swap out that factory chain and sprockets for a fresh set. The question is, what type of rear sprocket should you choose as a replacement?

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  • Cross-country racing tortures equipment. But it hasn’t broken this sprocket.


    Cross-country racing is brutal on men, women, and machine. Sustaining eye-popping speed through dirt, mud, sand, rocks, and water for seemingly endless periods of time is nothing short of the survival of the fittest. Especially for a bike’s drivetrain.

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  • Losing teeth can reap big rewards in performance.


    While it may not pay to put your old sprocket under your pillow at night, you can get big rewards in performance overnight by losing a tooth--or adding one--to your bike’s rear sprocket.


    No, there’s no sprocket tooth fairy (that we’re aware of), but there is an option for most riders who want to boost certain performance characteristics of their bikes. If you’ve got a bike or ATV with chain drive, you’ve also have a tunable drivetrain that can be modified slightly or dramatically to deliver exactly the performance you’re looking for.

    Pulling teeth. The sprockets installed on your machine at the factory were specified by talented engineers to provide the best all-around performance possible to suit the vast majority of riders. And, those factory-equipped bikes tend to do a great job of that. But for the rider who is looking for more immediate throttle response and faster acceleration than the stock configuration provides a relatively simple swap to a larger rear sprocket with one or two more teeth than the OEM sprocket can be like night and day. Similarly, for those looking for higher top speed and better fuel mileage than stock, switching out the factory rear sprocket for a replacement with one or two fewer teeth changes the gearing enough to accomplish the desired performance characteristics.

    Stick to the back teeth. For more incremental changes in performance, it is highly recommended to make changes to the rear sprocket versus the front. Especially since changing a single tooth on the front sprocket makes much more dramatic changes (often overly dramatic) than the rear and, when opting for a smaller front sprocket, it becomes harder for the chain to wrap around the smaller cog, thereby contributing to chain wear. Conversely, changes to the larger rear sprocket are much subtler and do not impact chain wrap and chain wear. If you’re looking for bigger changes, you may find that a combination of front and rear will work best.

    No need for a toothache. You don’t have to pull your hair out to grasp what sprocket teeth to pull or to add. The Sunstar website has a Ratio for Sprocket Combinations table in the Tech Info section that can help you determine exactly how each sprocket configuration will change the gearing of your bike. You can quickly see how a subtle or a more significant sprocket choice will vary from the stock gear ratio and how the desired effect can be accomplished with just the rear sprocket or in a combination of front and rear sprocket changes (for instance, one tooth larger front paired with a one tooth fewer rear).

    A material consideration. Beyond gear ratio, performance is also affected by sprung weight. The lighter the weight, the less mass must be moved by the engine. Choosing a sprocket made of aluminum can provide significant weight savings over stock steel sprockets (although it will not last as long). Or check out the hybrid options that combine lightweight materials with durable steel teeth rings to establish the ideal combination of weight savings and long-term performance.

    Check out the sprocket options and helpful gear ratio information for your machine at sunstar-braking.com. Need help selecting the right parts for your needs? Just ask! 

  • Advanced sprocket design repels dirt while you roost.

    Play Dirty

    Dirt riders love getting dirty; the more soil, sand, dust, and mud the better. But, as they say, it’s all fun and games until somebody gets hurt. In this case, what’s getting hurt is your bike’s sprockets and chain. Here’s the rub; all that grit and grime gets into the drivetrain and works like sandpaper, filing away at those critical components that keep your bike “moto-vating” down the track or trail. Plain and simple, dirt kills conventional chains and sprockets.

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  • OEMazing!


    OEM? OMG! Restore your bike’s drivetrain to “as new” factory performance specs with sprockets and chains from the world’s largest OEM manufacturer.

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  • Here are the top four ways to keep your bike’s drivetrain performing like new.


    As riders who love performance, we tend to put our bikes through the paces every chance we get. And that means our machines can show accelerated wear and tear, especially on drivetrain components. That’s where the Core 4 maintenance tasks come in. With a commitment to doing these four simple tasks on a regular basis, we can go far to make sure our drivetrain continues to deliver top performance on every ride and for mile after mile.

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  • Could your bike’s drivetrain be a little stressed?


    The coronavirus pandemic has everyone a bit tense these days. And no wonder; even the most mundane and routine tasks that we all used to do without giving a second thought have suddenly become sources of anxiety. But here’s a task that might just help you relax … and help your bike’s drivetrain unwind a bit too.

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  • Keeping your sprocket teeth and chain clean can keep you smiling

    Mud in your teeth

    April showers bring … mud. And mud brings greater wear and tear to your bike’s sprockets and chain. Grime and gunk also create drag that robs your bike’s performance. Keeping the drive train clean and free of crud will extend the life of critical components and maximize its usable power. Here’s how to live and ride crud free.

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