1. Dirt Bike
    2. Parts
    3. Engine

    2005 Yamaha YZ250F Engine

    2005 Yamaha YZ250F
    Tire Size:
    Front: 80/100-21, Rear: 100/90-19
    Spark Plug:
    CR8E
    Stock Chain/Belt:
    520x112
    Stock Gearing:
    Front: 13T, Rear: 48T
    Oil Filter:
    KN-140
    Select Your Ride:Go
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    Grid List
    Wiseco
    Top End Kit
    $256.79
    $228.99
    You save $27.80 (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
    $183.99 - $219.99
    $165.59 - $197.99
    You save up to $22.00 (10%)
    (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
    $309.99
    $278.99
    You save $31.00 (10%)
    (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
    $469.95 - $549.95
    $446.99 - $522.99
    You save up to $26.96 (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
    $759.95
    $721.99
    You save $37.96 (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
    $179.95 - $228.95
    $156.99 - $199.99
    You save up to $28.96 (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
    $129.95
    $110.99
    You save $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 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
    Hot Rods
    Connecting Rod
    $159.95
    $151.99
    You save $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
    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.
    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
    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 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
    Wiseco
    Connecting Rod
    $129.69
    $116.79
    You save $12.90 (10%)
    (6)
    Wiseco Connecting Rod Double forged, connecting rods maintain superior dimensional consistency through improved grain flow. Shot peening eliminates residual stresses and smoothly blends the rod forg
    Wiseco
    Cam Chain
    $64.95
    $58.09
    You save $6.86 (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
    Works Connection Engine Plug 6061 T-6 Aluminum with an anodized finish and O-ring seal Machined from billet aluminum, these new plugs are guaranteed to add a "Factory" look to your bike Available in
    Hot Rods
    Main Bearing and Seal Kit
    $72.95
    $69.99
    You save $2.96 (4%)
    (0)
    Hot Rods Main Bearing and Seal KitPrecision, high-quality main bearing and seal kits complement Hot Rods crankshaft assemblies All kits contain two main bearings and two seals Work for rebuilding Hot
    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
    Ride Engineering Billet Oil Fill Plug Flush mount design eliminates the risk of oil loss from a punctured or cracked plastic plug. Flush mount design also keeps plug from accidently becoming unscrewed

    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

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