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dirt bike Engine

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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!

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

  • Tusk Clutch Cover Gasket

    STEVEN in IN

    OEM replacements

    It is an inexpensive alternative to the OEM. I have never had any problems with Tusk gaskets and o-rings.

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  • Tusk Clutch Kit

    Bryan in CO

    Awesome Clutch Kit

    great clutch kit and put on very easy and made my bike ride 10x better. I would recommend this item if you need a new clutch.

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  • Tusk Clutch Kit With Heavy Duty Springs

    Alan in WA

    Okay performance, but not built for hard use.

    These work fine at the track with only minimal heat fade, but were a bust on trails. The fade got so bad I ran out of adjustment on the cable and with the lever pulled in the back was still wanting to push forward. Not something you need on a steep single track. They have been installed for about a year with oil changes just about after every ride.

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  • Wiseco Piston Kit

    JOHN in CA

    happy but a little unhappy at the same time

    would have given it a 5-star but had to knock it down not a complete kit without the bearing that used to come with these kits come on guys what gives.

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  • EBC Clutch Kit

    Shawn in AZ

    Works like OEM. No problems.

    I have only changed out a couple of clutches in my riding career and have always used this EBC brand. I haven't had any problems with either of them. The clutch on both bikes works like new and I would order this kit again when needed. Read the instructions and you will be happy. I have seen where these are very highly reviewed and that is why I chose it.

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  • EBC Clutch Spring Set

    Patrick in MI


    I always use the EBC clutch springs. Never had any issues and there a great price

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