The 20psi change does show a reasonable amount of wear on the bores/rings but not massively so. The 110psi is very low though if the bike isn't smoking or lacking power. I'd check the gauge against another in case its faulty. Also what are the valve clearances like? Too loose or tight will drop the pressure without smoke (power would be down though)
Yeah, it's an old gunson, mate has a real good quality one I'll borrow that once I've got some miles on it and see what it says
It's smoking a bit, but not excessively. I was concerned because the plugs didn't seem that old in it but were fucked, so thinking maybe oil was getting to them and knocking them early.
Checked the lv side of the coils shows 11.8 volts where the batteries showing 12.7.. I know there's a common mod to use relays to get the full voltage to the coils without the slight voltage drop old wiring gives..do you think it's worth doing or is 11.8 about right?
Having an old bike to work on is teaching me more about bikes than all the modern stuff I've had fir the past twenty years..
