Yamaha YZ85 Phathead cylinder head kit 2019-2026 KTM YZ250F YZ450F (2003-2013) WR450F WR250F

YZ250F YZ450F (2003-2013) WR450F WR250F (2003-2015)

TTR50 2006-present

5cc  (100+ octane)

two sets of o-rings

Sold as a kit with all required seals for the selected model

Yamaha YZ85 Phathead cylinder head kit 2019-2026 KTM YZ250F YZ450F (2003-2013) WR450F WR250FYamaha YZ85 Phathead cylinder head kit 2019 2026 Chamber selection: Y01 6. 4cc StockY02 6. 0cc (95+ octane)Y03 5. 6cc (100+ octane)Y04 5. 2cc (105+ octane) 52. 5mm (105cc) big bore chamber 100+ octane for use with big bore piston Phathead Kits include a head shell with one combustion chamber, two sets of o rings, cylinder head nuts, copper washers, some stickers for your bike and tool box and installation instructions.. Phathead cylinder heads are