Hi guys, I am looking for more power. I just used a compression gauge on my bike and it is only reading 40psi. The bike runs and with a 38t sprocket tops out at 25 mph. I have read that stock compression is around 90 lbs. Is it even possible the enginevitable will run at 40psi? I got this bike used and was told that the engine only a couple of tanks of gas run through it , so should be fairly new.