KTM85 2018-2024 Phathead cylinder head kit GasGas MC85 Husqvarna TC85 supermini KTM 5mm (105cc) big bore chamber

5mm (105cc) big bore chamber 100+ octane - for use with big bore piston

Made in USA with USA sourced materials

two sets of o-rings

YFM250 Moto-4 YFM350FW Big Bear 4x4 YFM350X Warrior YFZ350 Banshee 1990

8cc 72mm 93 octane - Revised squish clearance

KTM85 2018-2024 Phathead cylinder head kit GasGas MC85 Husqvarna TC85 supermini KTM 5mm (105cc) big bore chamberKTM85 2018 2024 Phathead cylinder head kit GasGas MC85 Husqvarna TC85 supermini Chamber selection: SX85 7. 4cc stock SX86 7. 1cc 100+ octane SX87 6. 9cc 105+ 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