Suzuki RG150?

[Asher]

Google says: 6.8:1

So, atmospheric pressure at sea level is around 1000mbar= 14.5psi*6.8= 98psi

Although the compression gauge you use may take up more or less volume than your spark plug giving an incorrect reading

[NAR RG500]

hi guys
wanting to do a compresion test on my rg150 does any1 know what sorta figures i should be getting cheers lenard

If it's under 90 then it's pretty tired, fresh is should be at least 130. All depends on the gauge and technique.

Make sure you do it with a warm engine and throttle wide open.

Cheers