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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!
Dominic in NY
I bought this because I did not like the plastic plug that comes stock on the bike. That is easy to over tighten and I always worried that the plastic would snap. The WC plug looks better and I can lightly snug it down with a 12mm socket. No worries that it will snap or come loose. My only complaint would be the the high cost of this seemingly inexpensive part.Read All Reviews
Gabe in WI
I put this in my 1993 yamaha yz250 that had a slipping clutch. I have roughly 80 hrs on the clutch right now, I don't "power shift" through the gears, but I do pop the clutch to pull wheelies in 1st, 2nd, 3rd, and 4th basically every ride, this clutch locks up quick and has been holding up great. Clutch pull is obviously going to be a bit tough, but I'm used to old cable style clutches so it doesn't bother me none. Overall been holding up good for me!!Read All Reviews