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2022 HUSQVARNA TC 250
Delete this machine from profileSelect this machine2001 KTM 520 MXC 4 Stroke
Delete this machine from profileSelect this machine1999 HUSQVARNA WR 250
Delete this machine from profileSelect this machineA 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!

Brecken in NE
Great gasket sealed and hasnt leaked yet the 53 hours it has been installed.
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Ismael in FL
Very satisfied with this Tusk gasket. The quality looks excellent, the material feels durable, and it seals perfectly. It arrived well packaged and matched the original specifications without any issues. Installation was easy, and everything fit exactly as expected. Great value for the price and a product I would definitely recommend.
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Michael in WV
great item works as intended. have had no issues with it on a big bore bike
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MIKE in TN
Old clutch was super sticky when cold. Killed the engine when put into gear. This new Tusk clutch kit made it like new again. Easy installation. It doesn't come with the cover gasket. I reused mine.
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Chance in FL
FITMENT WAS PERFECT. ILL KEEP USING TUSK PRODUCTS FOR ALL MY MOTORCYCLES! PRICE POINTS ARE ALWAYS IN LINE WITH THE BUDGET!
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Kort in CA
Recommended brand for 2 stroke pistons by my motocross racer friends and I recommend it too. Very high quality and I plan to keep on using this piston brand.
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