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
    Refine
    Grid List
    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 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
    $89.95
    $71.96
    You save $17.99 (20%)
    (5)
    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
    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 Replacement Cylinder Replace your damaged or worn out OEM cylinder Made from cast aluminum, nickel silicon carbide plated Precision machined and honed to OEM stock bore sizes Extremely d
    Hot Rods
    Connecting Rod
    $159.95
    $135.96
    You save $23.99 (15%)
    (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
    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
    Athena
    Complete Gasket Kit
    $136.95
    $123.99
    You save $12.96 (9%)
    (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
    Wiseco
    Cam Chain
    $80.95
    $72.89
    You save $8.06 (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
    Hot Rods
    Main Bearing and Seal Kit
    $64.95
    $55.21
    You save $9.74 (15%)
    (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
    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.
    Maxima
    ProFilter Oil Filter Cover
    $29.95
    $25.46
    You save $4.49 (15%)
    (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
    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)
    Hot Rods
    Crankshaft Assembly
    $319.95 - $399.95
    $271.96 - $339.96
    You save up to $59.99 (15%)
    (1)
    Hot Rods Crankshaft Assembly All new assembly sold complete with Hot Rods connecting rod Factory assembled and trued to OEM specifications, Hot Rods cranks will meet or surpass the OEM in perform
    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
    Mod Quad
    Dipstick
    $23.95 - $24.95
    $22.99 - $23.99
    You save up to $0.96 (4%)
    (0)
    Mod Quad DipstickMade from 6061 Aluminum and polished complete with O-Ring **Closeouts are limited to stock on hand**

    Latest Reviews

    Curtis (Chesapeake, VA)

    Fit
    Quality
    Installation
    Recommend

    Top end bearing

    Good OEM substitute. Used one on my last top end without issue.

    Curtis (Chesapeake , VA)

    Fit
    Quality
    Installation
    Recommend

    Gasket kit

    Good quality gasket set. Had everything I needed including multiple thickness base gaskets to properly set head space. Would buy again.

    Jim (Sheboygan, WI)

    Fit
    Quality
    Installation
    Recommend

    Shim Kit

    Glad I bought the kit, better than buying individual shims at the Honda shop. Fair price, quick delivery.

    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!

    Back to Top