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    Dirt Bike Engine

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    Wiseco
    Top End Kit
    $110.39 - $334.79
    $98.99 - $297.99
    You save up to $36.80 (11%)
    (19)
    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
    Pro Lite Piston Kit
    $88.19 - $240.95
    $77.69 - $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
    Complete Bottom End Rebuild Kit
    $219.99 - $609.95
    $197.99 - $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
    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 A life saver when things go south for your engine, the Hot Rods Complete Bottom End Rebuild Kit features all the parts you need to get back on the track. Addit
    Wrench Rabbit
    Complete Rebuild Kit In A Box
    $359.95 - $899.95
    $341.99 - $854.99
    You save up to $44.96 (5%)
    (0)
    Wrench Rabbit Complete Rebuild Kit In A Box Wrench Rabbit isn't lying, this kit does come in a box and contains everything you need to get your dirt bike running again. Two stroke or four stroke, this
    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
    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
    Vertex
    Piston Kit
    $46.99 - $247.95
    $40.99 - $215.99
    You save up to $31.96 (13%)
    (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
    MSR
    Flywheel Weight
    $109.95 - $129.95
    $93.99 - $110.99
    You save up to $18.96 (15%)
    (1)
    MSR Racing Flywheel WeightPrecision machined from billet steel Bolt-on installation, no drilling or tapping required Ignition cover spacer included when needed Smoother power Reduces stalling Manufact
    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
    BikeMaster
    Magnetic Steel Oil Drain Plug
    $10.35
    $9.99
    You save $0.36 (3%)
    (10)
    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
    Wiseco
    Top End Bearing
    $15.89 - $18.19
    $13.99 - $16.09
    You save up to $2.10 (12%)
    (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
    Cylinder Works
    Cylinder Kit
    $558.95 - $639.95
    $463.99 - $531.99
    You save up to $107.96 (17%)
    (0)
    Cylinder Works Cylinder Kit Replace that tired, worn out, or blown up engine with a new Cylinder Works Cylinder Kit. Each kit contains all the necessary parts to get your ATV or Dirt Bike back on th
    Hot Rods
    Connecting Rod
    $99.95 - $159.95
    $94.99 - $151.99
    You save up to $7.96 (5%)
    (0)
    Hot Rods Connecting Rod Affordable premium quality replacement connecting rods Forged from 8620 AISI steel, hardness tested to insure strength and durability AISI carburized crankpi
    Wiseco
    Replacement Ring Set
    $17.29 - $37.89
    $15.29 - $33.39
    You save up to $4.50 (12%)
    (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
    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.
    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
    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
    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
    Hammerhead Designs Engine Plugs6061 T-6 aluminum with and anodized finish and o-ring seal Machined from billet aluminum , guaranteed to add a "factory" look to your bike Kit includes 2 plugs and o-r
    Moose Racing
    Cast Piston
    $51.95 - $196.95
    (0)
    Moose Racing Cast PistonGravity cast aluminum alloy with 18% silicon to increase resistance to wear and decrease thermal distortion, thus providing a longer piston life Coated skirts ease break-in, d
    Maxima
    ProFilter Oil Filter Cover
    $29.95
    $26.96
    You save $2.99 (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
    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
    Works Connection Oil Filler Plug 6061 T-6 Aluminum with an anodized finish and O-ring seal Adds nice factory look Made in the USA **Note: Honda CRF450R models must order one for crankcase and one fo

    Latest Reviews

    Jake (Colchester, CT)

    Fit
    Quality
    Installation
    Recommend

    Was good...

    Fit great and was an easy installation but blew it first time I took it to the track.

    Davey (South Central, WI)

    Fit
    Quality
    Installation
    Recommend

    Great Deal

    2008 FZ1- Fit perfectly, no 'big glob of glue' on the end holding the magnet in. Nice black finish, we'll see if it holds up. Same exact length as stock. I'm actually kind of excited to see what it pulls out of the oil at the next interval. Cheap insurance, money well spent!

    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.

    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

    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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