YZ250f 290cc big bore kit. Bolt on kit for 2001-2010.
Total for the basic kit: $500.00.
Includes Brand New aluminum nikasil plated 83mm cylinder. 83mm Forged JE piston kit, Cometic big bore top-end gasket set.
This cylinder casting looks 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.
Also available with a lightweight two ring design piston for an additional $50
Free UPS ground shipping in USA.
We will give $35.00 off if you send us 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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