You are viewing a combination of machine-specific and universal parts. Please choose a machine to display parts specific to your machine or select a part below.
User Tip: If you're unsure of your vehicle type, you may skip the machine type selection box.
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!
Paul in AR
This is a great deal on a clutch kit. The metal plates are made of steel and are worth the purchase price alone. The fiber plates are not Hinson quality, but comparable to most name brands. If you are a clutch abuser it might not hold up for a full season, but then most of the high end clutches will not either.Read All Reviews
Alexandre in AR
At first I received the wrong tool to install it (see picture). But Rocky mountain sent a replacement and after that, it was all good. I used a flywheel holder to remove the original screw, and a tool to block the piston for the install. Love the way my bike handles now. The 250 SX was a bit too much for me, now I can use the torque better. Remember to check the install after 30min as it tends to come loose.Read All Reviews
Brent in OK
Bling kit added just a splash of Yamaha blue back to my bike. I went away from the Yamaha blue and went white/black. The kit was easy to install except the main timing plug. I was unable to locate an Allen wrench that fit it tight, it ended up with some scratched surface on the interior of the plug.Read All Reviews