Latest Engine Reviews – You could win up to $500 for reviewing products!

  • Tusk Clutch Kit

    Tusk Clutch Kit

    Michael in SC

    Good clutch

    This is a good clutch for the money I use them in all my machines

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  • Tusk Clutch Kit With Heavy Duty Springs

    Tusk Clutch Kit With Heavy Duty Springs

    Michael in SC

    Good clutch

    Great clutch for the money. I used them in all my machines.

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  • Yamaha GYTR Off-Road Flywheel

    Yamaha GYTR Off-Road Flywheel

    brandon in CA

    Smooth Power

    This was an awesome add-on for my 450 and was easy to install. bought it with a Tusk fly wheel puller and swapped it out during an oil change. Now my bike makes really clean controllable power throughout its entire RPM range and with no noticeable sacrifice to the top end. I immediately noticed the bike hooks a lot better with less unwanted wheel spin and is not nearly as pronounced to stall while lugging it thru technical sections of the trail. Should of came stock in the bike in my opinion. I also like it on the track helps out big time with the ole accidental whiskey throttle toward the end of the day when your arms are spent.

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  • Rekluse Z-Start Pro Automatic Clutch

    Rekluse Z-Start Pro Automatic Clutch

    brandon in CA

    One of favorite bike upgrades

    I have been riding for 25+ years and this is by far a must have for me. well next to a good steering stabilizer that is. Makes riding super technical terrain a piece of cake and cuts rider fatigue a lot. I also installed a weighted fly wheel and it made my bike a completely different animal and absolutely never stalls. Feels like a complete new bike and is so much more enjoyable to ride all day.

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  • Tusk Oil Filter

    Tusk Oil Filter

    Danny in ID

    Tusk

    Quality filter at a low price

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  • Neutron Oil Filter

    Neutron Oil Filter

    Danny in ID

    Buy It!!

    Great wire mesh filter, this filter caught everything from my rebuild. You could clean and reuse these easily but for the price you get them for why would you.

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Dirt Bike Engine Parts

A dirt bike engine is an incredible piece of machinery, finely tuned for the rigors of off-road thrills. It keeps your motorcycle on the go in some of the roughest terrain, whether it’s the precision of a cleverly crafted motocross track or the raw appeal of nature’s finest trails. Your dirt bike’s engine is complex and intricate. A lot goes on in there, and it needs to be kept in the best shape possible in order to produce the results you’ve come to expect. When it’s time to look for dirt bike engine parts, you know you can turn to Rocky Mountain ATV/MC.

We carry a wide variety of motorcycle engine parts. If you only need a few replacement parts, we’ve got everything from crankshaft assemblies to piston kits to oil filters. If you want to upgrade your existing parts to improve your bike’s overall power or handling, we carry parts as varied as big bore kits, flywheels and individual shims. And since we’ve got the best prices around, you don’t need to feel worried about an overwhelming engine rebuild cost. In fact, you might be surprised at how affordable it can be to make some serious enhancements to your dirt bike’s engine!

We carry the names you’d expect for dirt bike engine parts: Wiseco, Athena, Cylinder Works, Rekluse, Pro X, Hot Cams, Vertex and more. (If you check out our section for OEM parts, you can find original stock replacements as well.) If you want to replace a few shot parts, you’re in the right place. If you want to rebuild your engine to be the best motocross engine or enduro engine it can be, you’ll find what you need here.

From the simplest piston circlip to the most advanced automatic clutch kit, we’ve got you covered for all of your dirt bike engine needs. So whether you’re in the process of a complete engine rebuild or just want the best motocross engine mods, you know that there’s nowhere better than Rocky Mountain ATV/MC!

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