JSP ALL OUT MX HEAD INSERTS
$95.00
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Custom 5.2cc billet inserts. Maximizing the full power of your race engine with more over rev and mid/top end power for those wide open outdoor tracks. Housing a smaller 10mm spark plug optimizing combustion efficiently. Smaller squish band requiring the cylinder to be raised 0.2mm-0.3mm over stock height. Set to OEM squish specs 75mm-85mm. NOTE- Requires NGK LR8B spark plug
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