KTM65SX 2009 - 2025 Husqvarna TC65 2024 - 2025 / GasGas MC65 2024 -2025 Phathead cylinder head kit Chamber selection:SX67 5.8cc 105+ octane 8cc (110+ octane)

8cc (110+ octane)

KTM 65SX 2009 - 2025  Husqvarna TC65 2024 - 2025 / GasGas MC65 2024 -2025 Phathead cylinder head kit

Remove the original guts from the stock plastic cap and install into the new billet shell

KX85 & KX100 up to 2013 (see other cap for 2014+)

3cc Stock compression

KTM65SX 2009 - 2025 Husqvarna TC65 2024 - 2025 / GasGas MC65 2024 -2025 Phathead cylinder head kit Chamber selection:SX67 5.8cc 105+ octane 8cc (110+ octane)This head kit uses the 2024 2025 style plug with longer reach for an upgrade to the 2009 2023 models. Use the NGK MR8BI or OE 2024+ spark plug KTM 65SX 2009 2025 Husqvarna TC65 2024 2025 GasGas MC65 2024 2025 Phathead cylinder head kit Chamber selection: SX65 6. 2cc stock compression SX66 6. 0cc 100+ octane SX67 5. 8cc 105+ octane Phathead Kits include a head shell with one combustion chamber, two sets of o rings, cylinder head nuts, copper washers,