Click here for Picture of 310 kit
YZ250f big bore / stroker 310cc. 13:1 Bolt in for 2001-2002
Includes Brand New +3mm Stroker crankshaft assembly.
Flywheel Upgrade kit to use 2003 and newer crank in 2001-2002 motors.
Brand new nikasil plated aluminum 83mm cylinder.
83mm Lukesracing Custom order light weight two ring design JE piston kit, Cometic big bore top-end gasket set.
Fits 2001 through 2002. Total for the kit: $980.00
This cylinder casting is nearly identical to the stock
cylinder casting from the outside, it even has 249cm3 cast into it.
This is not a yamaha overbored cylinder, it is a Brand new Custom made Big bore cylinder.
This is a bolt in kit, no case mods or any other mods needed to install.
Free UPS ground shipping in USA.
We will give $35.00 off if you send your old cylinder.
$50 off when
you order any two 4 stroke big bore kits
- when ordering online their is no option for the discount,
but we will deduct the $50 from your order before processing
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