Scooterotica

Hi just after some info on compression ratios
Anyone no what ratio a 150 head is and are these ok to get machined to fit a 200 piston for a small block engine thanks

Each model of 150 had a different ratio. About 7,8:1 I think. However, if you are fitting a 200 piston, you are aquiring 200 ratios. Regardless of the compression ratio, you will need to machine your head accordingly. Any reputable tuner MUST be able to do this for you.

Regards,

J.