YFZ450R Big Bore 5mm Stroker Crank 520cc Rebuild Kit Hotcams +1 Valves
YFZ450R Big Bore 5mm Stroker Crank 520cc Rebuild Kit Hotcams +1 Valves
YFZ450R Big Bore 5mm Stroker Crank 520cc Rebuild Kit Hotcams +1 Valves
YFZ450R Big Bore 5mm Stroker Crank 520cc Rebuild Kit Hotcams +1 Valves
YFZ450R Big Bore 5mm Stroker Crank 520cc Rebuild Kit Hotcams +1 Valves
YFZ450R Big Bore 5mm Stroker Crank 520cc Rebuild Kit Hotcams +1 Valves
YFZ450R Big Bore 5mm Stroker Crank 520cc Rebuild Kit Hotcams +1 Valves
YFZ450R Big Bore 5mm Stroker Crank 520cc Rebuild Kit Hotcams +1 Valves

YFZ450R Big Bore 5mm Stroker Crank 520cc Rebuild Kit Hotcams +1 Valves

Regular price$4,462.00
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Shipping calculated at checkout.

THE BIGGEST BADDEST BIG BORE STROKER ON THE PLANET - 520cc!

FITS ALL YAMAHA YFZ450r FI MODELS AND YEARS
    • 98mm big bore cylinder
    • +5mm CUSTOM BUILT Crankworks stroker crank
    • Wiseco forged big bore piston**
    • Hi temp piston rings
    • Chrome wristpin
    • Circlips
    • Stage 3 Hotcams intake and exhaust
    • Kibblewhite valve spring kit
    • Kibblewhite +1mm stainless intake and exhaust valves
    • Talon TITANIUM cylinder head stud kit
    • Crank bearings
    • Crank balancer bearings
    • Transmission bearings
    • Shift cam bearing
    • Water pump bearing
    • Complete gasket kit
    • Cometic MLS big bore head gasket
    • Complete seal kit
    • Valve stem seals
    • Water pump mechanical seal
    • Cam chain
    • Cam chain guides
    • Billet cam chain tensioner
    • Oil pump
    • K&N oil filter
    • NGK spark plug
    • Piston uses pump or race gas
    • Very rarely crankcases must be Clearence'd for stroker crank
    • 1 year warranty*

     *Warranty: We stand behind all parts we sell 100%.  This product is NOT DIY.  Over 99% of people in the world are not qualified to build an engine, and it is the responsibility of the person assembling and tuning the engine to make sure everything works correctly.  It requires special tools and has to be done 100% correct.  We ALWAYS STRONGLY recommend parts be installed by a qualified, experienced mechanic.  Warranty does not cover failure that is a result of improper installation, tuning, break in, or misuse.   STUD WARRANTY: If for any reason a stud fails during use, not installation, we will send a completely new stud kit.  No other parts or any labor are included, and it can not be converted to a refund or discount on any order.  Studs must be returned to us for inspection first. WE CAN NOT WARRANTY PARTS BASED SOLELY ON PHONE CALLS, EMAILS, PHOTOS, VIDEOS, WHAT YOU READ ONLINE, OR WHAT ANOTHER MECHANIC SAYS IS THE PROBLEM.  WE HAVE A VERY GOOD WARRANTY PROGRAM BUT FOR ANY WARRANTY TO BE CONSIDERED THE PART(S) IN QUESTION MUST BE SENT BACK TO US TO INSPECT.  NO EXCEPTIONS.

    We ship next day most of the time. Modquad parts are shipped Monday-Thursday. Engine Kits are 3-5 business days.

    We don't do backorder! If your items has already sold you will be notified immediately and you money refunded on the spot.

    Sold items are removed daily.

    If you see it on this website, it is 100% in stock unless it just sold before you clicked buy.

    If you call we answer, if you text we respond, if you have a question we respond. Sometimes we sleep so it could be next morning but we will respond.

    Thank you for shopping with us! We appreciate you!

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    Cut em Up!

    Dune Goons Rider ~ Breanna
    Showing her personal style and cutting the shirts up to her liking. We don't mind one bit! Cut em Up!