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BPRATV will be closed on December 24th and 25th in observance of the Christmas holiday. We will have very limited operations from December 27th to December 31st for our annual cycle counts. Thank you for your patience and understanding. Additionally, we will be closed on January 1, 2025, for New Year's Day.
BPRATV will be closed on December 24th and 25th in observance of the Christmas holiday. We will have very limited operations from December 27th to December 31st for our annual cycle counts. Thank you for your patience and understanding. Additionally, we will be closed on January 1, 2025, for New Year's Day.

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

by BPRATV
Original price $3,099.99 - Original price $3,099.99
Original price
$3,099.99
$3,099.99 - $3,099.99
Current price $3,099.99
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 clearenced for stroker crank
    • 1 year warranty*

     PRICES AND LISTINGS ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE.

    DO YOU MAKE A LIVING WORKING ON BIKES? ARE YOU A SHOP OR DEALER?  IF SO CONTACT US ABOUT OUR DEALER PROGRAM THAT GIVES YOU DISCOUNTS ON EVERYTHING WE SELL!

    Payments:  We accept all forms of traditional and online payment methods available – Cash, MC, AMEX, VISA, DISC, PayPal, Venmo, Cash App, among others.  Payment can be made online or over the phone.

     Returns: Please check your order completely when you receive it and contact us if there is an issue.  99% of problems can be easily solved without returning the entire order.  We accept returns within the first 30 days.  If you are returning an order because buyer “Changed Mind” it is subject to a 10% restocking fee plus a deduction for our cost shipping the order to you.  Orders must be sent back 100% complete and all parts must be brand new, never installed, in the original packaging to receive a refund for them.  Once items have been modified, installed, or used in any way they are not eligible for return.  It is the buyer’s responsibility to ensure returned parts arrive to us in the same condition they were when they left our facility.  For more info about returns see the eBay Return Policy. 

     *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.

    Feedback: Positive feedback is greatly appreciated.  We have changed the way we do business in response to customer concerns and receiving positive feedback when an order goes the way it is supposed to is a huge help.  If you do not feel we deserve positive feedback just contact us and we will do what is needed to help you feel as "positive" as possible about your experience.  Also, we want information from customers when their experience is less than desirable so we know what areas need improvement the most.  Please work with us and we will ALWAYS work with you.

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