Time to leave the competition in the dust. Step up to the big bore power and feel the rush with the Big Bore Stroker Motor Rebuild Kit. 98mm 500cc!! 


Believe it or not this is a bolt on kit.  No machining is required! It will work with your stock or modified head. Works on all years and models. Everything is brand new.



  • 98mm cylinder
  • 12.5:1 CP piston kit (13.5:1 and 14:1 also available)
  • Hotrods 3mm / 4.4mm stroker crankshaft
  • Hotcams Stage 3 camshaft set
  • Kibblewhite valve spring kit
  • Kibblewhite stainless steel intake and exhaust valves
  • Roller bearings for entire motor
  • Complete gasket set
  • Complete oil seal kit
  • Timing chain


Yamaha YFZ 450 Compatible Years:

  • 2006 through 2020

Big Bore Stroker Kit Motor Rebuild, 98mm 500cc - Yamaha YFZ 450

  • About Our Parts

    We have all NEW, Genuine OEM, NOS, vintage and obsolete parts. Therefore, we cannot guarantee availability on NOS or obsolete parts.


    However, if there is an obsolete or hard to find part that you are looking for, that is not listed on our website, please email us and we will most likely be able to get it for you.

  • Shipping and Deliveries


    All in stock merchandise will typically ship within 3-5 business days, after purchase date. *unless otherwise noted on the product detail page or stated via phone/email*



    Most orders will be delivered between 3-5 days, after your item(s) have been shipped! *depending on delivery option choosen at checkout* 

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