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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!
Jody in OK
I've used Tusk clutches on several bikes, they all seem to work as good as stock.Read All Reviews
Ryan in KS
Was a little leary when I opened the box and seen 1 extra clutch spring, but I'm sure its multi-application for the springs. Steels are of good quality. Fibers measure perfect to oem specs for thickness. Springs were longer than oem but they are heavier and work just fine. Doesnt seem to affect pull at all. No signs of slipping and working like a champ.Read All Reviews
Nathan in WI
Everything fit correctly and did its job well. Really like Tusk stuff. Can't beat the value.Read All Reviews
Justin in SC
Very nice piston, kit comes with everything included in description. Piston came in a velvet sack. Also came with some stickers so that's always a plus.Read All Reviews
DRAKE in CO
Has worked great so far for my Yamaha warrior and is a great oem replacement!Read All Reviews
Thomas in NJ
These springs were installed on my KLR while changing clutch. The springs seem very good. Always happy with my purchases from Rocky Mountain!Read All Reviews