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

Chamber selection
Regular price $325.00 USD
Regular price Sale price $325.00 USD
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Shipping calculated at checkout.

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, 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 aluminum.  The two piece design allows an increase in coolant flow as well as surface area which improves cooling for better consistency and performance.   

One of the main benefits of the product is the replaceable combustion chamber which are available in a range of compression options.

Suggestions : Swap chambers to adjust performance for a variety of riding conditions and track types or keep a spare in case of engine failure.