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KTM 50SX 2024 2025 Husqvarna TC50 2024 - 2025 / GasGas MC50 2024 -2025 Phathead cylinder head kit
5cc (100+ octane)HN53 - 60
KTM250SX KTM250XC 2007-2016 Phathead cylinder head kit
Phathead cylinder heads are made of 6061 T6 billet aluminum
Yamaha YZ85 Phathead cylinder head kit 2019-2026 Suzuki KTM 50SX 2024 2025 HusqvarnaYamaha 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