Yamaha YZ65 2018-2025+ Phathead cylinder head kit CR85 big bore kit Buy a size larger than

Buy a size larger than usual if you want a loose fit

Available for all models: Honda Kawasaki KTM HUSKY GAS GAS Suzuki Yamaha

6061 T6 billet aluminum body

Call for custom specs - fees vary

mapping suggested

Yamaha YZ65 2018-2025+ Phathead cylinder head kit CR85 big bore kit Buy a size larger thanYamaha YZ65 2018 2025+ Phathead cylinder head kit Chamber selection: YZ65 5. 2cc stock YZ66 5. 0cc 95+ octane YZ67 4. 8cc 100+ octane 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 made of 6061 T6 billet aluminum. The material is stronger and transfers heat better than cast