1. ATV
    2. Parts
    3. Engine

    2005 Yamaha YFZ450 Engine

    2005 Yamaha YFZ450
    Tire Size:
    Rear: 20x10R-9
    Oil Filter:
    KN-141
    Select Your Ride:Go
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    Wiseco
    Top End Kit
    $256.89 - $319.39
    $228.99 - $284.99
    You save up to $34.40 (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
    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
    $205.95
    $179.99
    You save $25.96 (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
    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
    Cylinder Works
    Cylinder Kit
    $559.95 - $579.95
    $464.89 - $481.99
    You save up to $97.96 (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
    $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 Ring Set Restore the compression to your tired motor with a new set of Moose Racing Piston RingsMade in the U.S.A. **Notes: Kawasaki Brute Force 750i (2005-2011), Teryx 750 (2009-2012)
    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
    Wiseco
    Cam Chain
    $78.95
    $71.09
    You save $7.86 (10%)
    (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
    $64.95
    $61.99
    You save $2.96 (5%)
    (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 450cc Cylinder Kit Bolt on kit, no machining required Aluminum cylinder with nickel-carbide coating designed with wider water jackets Complete piston kit, Forged piston wi
    Athena 480cc Big Bore Cylinder Kit Bolt on kit, no machining required Aluminum cylinder with nickel-carbide coating designed with wider water jackets Complete piston kit, Forged p
    Pro X Racing Parts Cam Chain Manufactured in Japan by Borg Warner Designed to O.E.M. specifications Strong M-Type chain which has special heat treated pins plus advanced pin and link connections for

    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.

    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!

    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!!

    Alejandro (brooklyn, NY)

    Fit
    Quality
    Installation
    Recommend

    CLEAN finish

    Just tops off any bike to become better. I love it!!

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