ALL orders include a FREE $20 Motosport gift card and exclusive coupon pack! No strings attached just place that order! Retail Cost: $850 plus shipping costs Product Description: TURN YOUR YZ250 into a fire breathing YZ300 with this bolt on complete kit. These kits include a ported and Nikasil plated cylinder, cylinder head, all 3 powervalves and center retaining clip (swapped from new 2024 yz250 cylinder), new Yamaha studs, and COMETIC MLS head gasket and top end gaskets, o-rings, and copper washers. The forged and coated piston kit includes 2 rings, pin, bearing, and circlips. **The fuel choices are up to you and the choices are pump gas 10% Ethanol 89 RON and race gas of 98 RON or greater** Product Condition: NEW Manufacturer Part # N/A Pres MX Part # PB2407 Please confirm fitment before ordering. Let me know if you have any questions! Thanks for shopping! *International Buyers are responsible for Import Fees / Duty Fees / Taxes* *Buyer is responsible for verifying condition BEFORE purchase! (more photos can be provided upon request) *ALL SALES ARE FINAL*