ENGINE

See all parts that fit your machine

User Tip: If you're unsure of your vehicle type, you may skip the machine type selection box.

Log in to use your Rider Profile Machines »

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

  • EBC Clutch Kit

    EBC Clutch Kit

    Eric in CA

    much better than the Tusk kit

    Tusk kit was grabby and grooved really fast. This kit has worked flawless so far. have about 20 hours on it so far. Tusk kit started lurching after about 15-20 hours. After inspection they were grooved and pounded badly. The friction material was fine but the tangs were pounded. EBC kit fixed that. We'll see if they last

    Read All Reviews
  • Pro X Piston Kit

    Pro X Piston Kit

    Carson in GA

    Good value

    I just had to replace an old, completely worn out piston. This new top end gave me a lot more compression and a lot more power. I am very happy with Pro X.

    Read All Reviews
  • Carbon Up Armor Clutch Cover

    Carbon Up Armor Clutch Cover

    MICHAEL in NJ

    Durable Replacement Cover

    After a couple years of use my stock cover was wearing thin, decided to replace it before it became a problem. The Carbon Up fits nicely and seems durable enough, my only complaint is the threaded hole for the oil fill cap is a bit tight when opening/closing but perhaps it will break in with some time.

    Read All Reviews
  • Rekluse Z-Start Pro Automatic Clutch

    Rekluse Z-Start Pro Automatic Clutch

    Mike in OR

    Not just for woods riders

    I'm mostly a practice queen now, but still race Washougal and PRI a half-dozen times a year. I've had this now for 80 hours on my moto bike. I will replace steels and frictions in the next couple weeks for the first time. They are not shot, but that's enough hours for them. This clutch works great for moto. I can come in hot in 3rd gear to a corner, brake slide in, hammer the throttle at the apex, and never, ever, worry about a stall. Hooks up just fine. And when it's wet and guys are down, stalled, everywhere, I just keep going. No issues with starts either - same technique as a standard clutch. 2nd gear, rev it till it engages and starts to creep, hold front brake on, and hammer it on the gate drop. Holeshot!

    Read All Reviews
  • Tusk Aluminum Oil Filter Cover

    Tusk Aluminum Oil Filter Cover

    Alan in GA

    filter cover for KTM 250 sxf

    fits perfectly, well worth the money. Adds that factory look to the bike.

    Read All Reviews
  • Tusk Top End Gasket Kit

    Tusk Top End Gasket Kit

    JEFF in VA

    Tusk Top End Gasket kit

    Great kit and perfect fit! Included all necessary gaskets as well as copper crush washers for the head bolts, two exhaust pipe o-rings, and 4 power valve o-rings. Also had a few extra o-rings for another application I assume.

    Read All Reviews

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!

RM Cash ProgramParts Finder