STREET PISTON: New 125cc Flat Top piston for the Honda Grom.
Honda Grom stock compression: 9.3:1
FinBro 125 Flat Top Street Piston: 10:5
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Piston shipped with new gasket set for base and head and also new wrist pin with clips to replace OEM components.
Increase your torque with a higher compression flat top 125cc piston. Raising your compression to 10.5 from the standard 9.3:1 will help you climb those hills and fight against the wind.
* A slightly higher octane level is needed to fight against detonation.