1. ATV
    2. Parts
    3. Engine

    2003 Yamaha Grizzly 660 4x4 Engine

    2003 Yamaha Grizzly 660 4x4
    Oil Filter:
    Select Your Ride:Go
    Grid List
    1-24 of 24
    Top End Kit
    $271.19 - $315.69
    $203.39 - $236.76
    You save up to $78.93 (25%)
    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
    Pro Lite Piston Kit
    $182.19 - $221.95
    $136.64 - $166.46
    You save up to $55.49 (25%)
    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
    Complete Bottom End Rebuild Kit
    You save $103.74 (25%)
    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
    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
    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
    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
    Hot Rods
    Connecting Rod
    You save $23.99 (15%)
    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
    Cam Chain
    You save $18.74 (25%)
    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
    Stainless Steel Engine Valves
    $25.95 - $32.95
    $13.99 - $24.71
    You save up to $8.24 (25%)
    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
    Piston Kit
    $129.99 - $148.99
    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
    Complete Gasket Set with Oil Seals
    You save $26.84 (15%)
    QuadBoss Complete Gasket Set with Oil Seals Set includes all gaskets and oil seals necessary to rebuild the engine and transmission including output shaft, water pump, clutch, shift and starter seals.
    Hot Rods
    Crankshaft Assembly
    $430.95 - $439.95
    $366.31 - $373.96
    You save up to $65.99 (15%)
    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
    Pro X Racing Parts Engine Valve ProX also offers a complete line of steel valves. The ProX steel valves are manufactured of premium grade steel to exact OEM specifications and tolerances. The ProX val
    Vesrah Racing
    Engine Valves
    $25.95 - $46.95
    Vesrah Engine Valves Vesrah valves are precision manufactured from top-quality materials to match OEM valves Sold Individually **Closeouts are limited to stock on hand**
    Hot Cams
    Mudbuster Cam
    You save $19.99 (10%)
    Hot Cams Mudbuster Cam When you're trying to make it through the mud the last thing you want to worry about is your engine bogging and getting you stuck. Change that with this Hot Cams Mudbus
    Oil Seal Set
    You save $7.49 (15%)
    QuadBoss Oil Seal Set Includes all oil seals necessary to rebuild the engine and transmission including crankshaft, output shaft, water pump, clutch, shift and starter seals
    Winderosa Top End Gasket Set Get your engine running like it did when it was brand new with the help of this Winderosa Top End Gasket Set. Top End Gasket Set Include: Head Gasket Base Gasket Upper
    Kibblewhite Precision Machining Valve Guide When rebuilding your engine you can trust that Kibblewhite Precision Machining Valve Guides are unmatched in performance and durability. Sold
    Kibblewhite Precision Machining Valve Spring Kit Kit contains:Springs Titanium upper collars Keepers Lower collars as required Kit sold complete for one motor   **The following models do not include

    Latest Reviews

    grayson (edmonton, AB)


    works fine

    Went in okay. One of the top o-rings was a pain in the ass, but it seemed to work out in the end. It recomended drilling a hole, but my old piston didn't have one, so I didn't feel like drilling my brand new piston.

    Bryan (Hayden , CO)


    its f****d

    Had my brand new Wiseco top and bottom end put in about a month ago in my 2002 Honda CR250r. Less than 10 hours and changing my fluids twice bottom end seized yet again. Biggest piece of crap I've spent my money on, wouldn't recommend AT ALL.

    Curtis (Chesapeake, VA)


    Top end bearing

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

    Curtis (Chesapeake , VA)


    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)


    Shim Kit

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

    Back to Top