This site has limited support for your browser. We recommend switching to Edge, Chrome, Safari, or Firefox.


YFZ450R YFZ 450R Crank Cases Case Complete Big Bore Rebuilt Motor Engine Rebuild


Compatible Vehicles
Submodel Year Make Model
Special Edition 2007 Yamaha YFZ450SE
Special Edition 2006 Yamaha YFZ450SE
Special Edition 2005 Yamaha YFZ450SE
Special Edition II 2007 Yamaha YFZ450SE2
Special Edition 2008 Yamaha YFZ450SP
Special Edition II 2008 Yamaha YFZ450SP2
Bill Balance Edition 2007 Yamaha YFZ450V
Bill Balance Edition 2006 Yamaha YFZ450V
Custom Graphics 2013 Yamaha YFZ450W
Custom Graphics 2012 Yamaha YFZ450W
    • 98mm NEW DESIGN big bore cylinder
    • Hotrods or Wiseco HD crank with rod
    • Wiseco or CP forged piston
    • Hi temp piston rings
    • DLC chrome wristpin
    • Circlips
    • Stage 3 Hotcams
    • Kibblewhite valve spring kit
    • Kibblewhite intake and exhaust valves
    • Valve stem seals
    • HD head stud kit
    • Clutch kit (fibers, steels, springs)
    • Heavy duty main bearings
    • Transmission bearings
    • Shift cam bearing
    • Complete water pump rebuild - bearing, mechanical seal, shaft
    • Complete gasket kit
    • Complete seal kit 
    • Cam chain

    No modification of any kind is required to use this kit.  Everything is new in the original packaging and the original manufacturer's warranty applies*

    Please check your order thoroughly when you receive it and contact us if you have any issues at all.  If you are not 100% happy with what you receive contact us ASAP!  Thanks!!

    *We ALWAYS STRONGLY recommend that this be installed by a qualified mechanic with experience doing this type of work.  Warranty does not cover any failure that is a result of improper installation, improper break in, improper tuning, or misuse.  For any warranty to be considered the part(s) in questions must first be sent to us for inspection.  We can not warranty anything based on phone calls or photos alone