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Dirt Bike Engine

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Wiseco
Pro Lite Piston Kit
$87.95 - $240.95
$78.99 - $214.99
You save up to $25.96 (11%)
(12)
Wiseco Pro Lite Piston Kit Available for both two stroke and four stroke bikes, the Wiseco Pro Lite Piston Kit is both a great OEM alternative and an easy way to boost the power. Choose stock bore siz
Wiseco
Top End Kit
$110.39 - $334.79
$98.99 - $297.99
You save up to $36.80 (11%)
(17)
Wiseco Top End Kit Wiseco-forged high-silicon aluminum alloy pistons are computer-machined to exacting tolerances Designed for greater strength with reduced weight and improved heat transfer Piston k
Wiseco
Complete Bottom End Rebuild Kit
$219.95 - $609.95
$195.99 - $543.99
You save up to $65.96 (11%)
(11)
Wiseco Complete Bottom End Rebuild Kit Each kit contains everything you need to complete your rebuild the right way, the first time- crankshaft and connecting rod, all applicable bearings, and complet
Namura Technologies Top End Repair Kit Namura Technologies piston kits are direct replacements for OEM piston with no modifications or dimensional adjustments needed. Combine this with the MOS2 coatin
Moose Racing Top End Gasket Kit Performance sets designed for a piston replacement Top-end gasket sets include high-performance head, base, intake and exhaust gaskets Cost-effective way to raise c
Hot Cams
Valve Shim Kit
$59.95 - $89.95
(4)
Hot Cams Valve Shim Kit Sick of taking your bike to an expensive mechanic to have them shim your valves just because you don't have the correct shims to do it yourself? Here is the answer, Hot Cams
Hot Rods
Complete Bottom End Rebuild Kit
$229.95 - $689.95
$218.99 - $655.99
You save up to $33.96 (5%)
(2)
Hot Rods Complete Bottom End Rebuild Kit Hot Rods Bottom End kits include everything needed to complete crankshaft installation Hot Rods Bottom Ends kits offer you the choice between Hot Rods Heavy D
MSR
Flywheel Weight
$109.95 - $124.95
$98.99 - $112.99
You save up to $11.96 (10%)
(1)
MSR Racing Flywheel WeightPrecision machined from stainless steel Bolt-on installation at end of crank- no drilling or tapping for most models Makes your machine easier to ride by smoothing the hit**
TMV
Flywheel Weight
$109.95 - $149.95
(1)
TMV Flywheel Weight Machined from 303 stainless steel that's 15% heavier than standard steel, allowing more mass in a smaller space No extra gaskets or leaking plastic spacers
Wiseco
Replacement Ring Set
$16.95 - $37.95
$15.99 - $33.99
You save up to $3.96 (10%)
(2)
Wiseco Replacement Ring Set Wiseco offers a complete range of popular piston models and years for both trail and racing applications Durability, longevity and increased horsepower Each ring set is
Wiseco
Cam Chain
$47.95 - $84.95
$42.99 - $75.99
You save up to $8.96 (11%)
(0)
Wiseco Cam Chain Made from premium materials to reduce friction and increase service life “M” style chain gives you maximum strength and durability Wiseco’s in-house
Moose Racing Countershaft Seal Kit Kit includes hardened steel bushing, an upgraded seal, an O-ring (where applicable) and a snap ring or lock washer (where applicable) Made in the U.S.A.
Athena
Complete Gasket Kit
$11.95 - $322.95
(3)
Athena Complete Gasket Kit Manufactured in "State-of-the-Art" computer controlled facilities All gaskets made from the highest quality materials All gasket sets meet or exceed OEM specifications The
BikeMaster
Magnetic Steel Oil Drain Plug
$10.35
$9.99
You save $0.36 (3%)
(9)
BikeMaster Magnetic Steel Oil Drain Plug It's hard to believe that a little bolt with a magnet can improve the performance and lifespan of your motorcycle. BikeMaster's Magnetic Oil Drain plug will
Maxima
ProFilter Oil Filter Cover
$29.95
$26.99
You save $2.96 (10%)
(6)
Maxima ProFilter Oil Filter Cover Features: Made from CNC-machined 6061 T-6 billit aluminum Includes a sub-suface anodized finish Lighweight and durable Increased flow Prec
Athena
Race Gasket Kit
$13.95 - $79.95
(0)
Athena Race Gasket Kit For the true Racer. Racers depend on reliability, performance and of course affordability, that's exactly what you get in Athena's new Race Gasket Kits Kits include a multi-laye
Wiseco
Stainless Steel Engine Valves
$10.50 - $68.95
$9.99 - $61.99
You save up to $6.96 (10%)
(1)
Wiseco Stainless Steel Engine Valves Stainless steel valves are manufactured to exacting tolerances from the highest grade material Forged one piece valves for unmatched strength CVD/CNI coated t
All Balls
Crankshaft Bearing and Seal Kit
$23.95 - $76.95
$21.99 - $69.99
You save up to $6.96 (9%)
(4)
All Balls Crankshaft Bearing and Seal Kit Kits feature Koyo and Nachi precision Japanese crank bearings Crankshaft seals feature a carbon/fluorocarbon pad on the seal lip and stainless
Vertex
Piston Kit
$46.99 - $247.95
(1)
Vertex Piston Kit Restore that crisp clean power that your dirtbike or quad use to have with a new Piston Kit from Vertex. Or step up the power with a high compression Piston Kit, All kits ar
Wiseco
Top End Bearing
$15.95 - $17.95
$14.99 - $15.99
You save up to $1.96 (11%)
(0)
Wiseco Top End Bearing When you replace your top end a new Top end bearing is a must. With a new Wiseco Top End Bearing it will keep that wrist pin and rod working perfectly when you put it t
Hot Cams
Stage 2 Cam
$179.95 - $269.95
(0)
Hot Cams Stage 2 Cam Extract maximum performance from your engine Hot Cams provide increased intake and exhaust duration for improved breathability and more horsepower Provides significantly more mid
Moose Racing Magnetic Drain Plug Prolong engine life and save on costly repairs with an oil plug that picks up metal filings Must use washer provided Compare with original OEM plug
Moose Racing Complete Gasket Set All gaskets needed for engine rebuild are included in each set with the exception of oil seals Unmatched reliability and performance from high-tech materials Design
Pro Circuit
Engine Plug Kit
$69.95 - $109.99
$62.99 - $98.99
You save up to $11.00 (10%)
(0)
Pro Circuit Engine Plug Kit Contains the required number of ignition cover and oil filler plugs Machined from aircraft-grade aluminum Polished to a mirror finish, then anodized for a one-

Latest Reviews

Patrick (Baton Rouge, LA)

Fit
Quality
Installation
Recommend

review

Huge glob of epoxy hanging around tip of magnet. Ordered it for a specific model and it does not fit. It is an M10. Should be an M8. Would use it even if it did fit. Worried about epoxy breaking off and churning around in motor.

Sean (Los Angeles, CA)

Fit
Quality
Installation
Recommend

Replaced the top end on my 96 cr125r! Fit great perform well but the price is the problem. For 70-80 bucks they'd be perfect!

Mike (Concord, NC)

Fit
Quality
Installation
Recommend

Hammerhead Engine Plugs

These fit perfect, and look great on the bike!! They do not come with O rings so you will have to use your oem ones or buy new ones but they are only a couple bucks- definitely worth the money.

Cooper (Russellville, IN)

Fit
Quality
Installation
Recommend

Wiseco piston

I put it all together very easily, but it blew up in less than 24 hours of installation!

J (LI, NY)

Fit
Quality
Installation
Recommend

125cc kit

I had this athena kit on my 2003 yz125 and the bike ripped. Probably was the fastest 125 Ive owned and it ran stock exhaust only other engine mod was vforce reed. I called it the blue demon :p

simon (berkshire, BRK)

Fit
Quality
Installation
Recommend

lully job

Ordered my wiseco bottom end kit and everything fell together. Fired up second kick, now first time everytime! I will run it very gently, because that is absolute key in a good engine as some do thrash and wonder why the cranks snapped or flattened bearings!!

Keep your power plant performing at its peak with dirt bike engine parts at Motorcycle Superstore. To ride to the front of the pack with, or charge those nasty up-hills, you’ll need a powerful motor between your legs. Motorcycle Superstore has everything you need to get the most out of your machine, from pistons, clutches, piston rings, valves, cylinder heads, gaskets and more. We carry all the top performing brands to ensure you’re getting the ponies you want. Is it time to replace a piston, rings or clutch? We have a massive selection of engine parts for you to replace those worn parts. Proper maintenance is key to getting a motor to last long, and with Motorcycle Superstore’s lowest prices, you can change filters, oil, pistons, rings and more without breaking the bank. Make sure you get the right dirt bike engine parts with our bike parts finder. Also, use our options filters to sort our inventory by price, brand and style. Stay roosting and shredding the dirt with dirt bike engine parts from Motorcycle Superstore
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