After another bout of treatment which has laid me up, I am back in the shed with the V35. My talented mate has put the original air filter back in and I decided to test the compression. See pics. One’s rubbish and the other is even more rubbish.
Looking at examining the barrels with a view to throwing more money at it in the shape of piston rings. £40 per side delivered from Greece. Gutsibits don’t have any at the moment.
Any thoughts/advice please.
100+ psi isn’t that bad really
The other one… Yeah, rings/bores, or valve seat/valve interface.
Cheap to try, bit of oil down the hole, does the compression rise? If so, rings, if not probably valve seat.
Cheap fix if so, head off and lap in the valves.
Well that’s cheered me up, thanks.
Going to be next week before I can do anything. Grrr.
Are you opening the throttle slides fully when doing the compression test.
Good point
Are there different tolerances for hot engine test? Or should you do it with a cold engine? I’d just be tempted to check and adjust the valves and ride it. My mates T160 smokes like a Suzuki kettle but it rides well. He’ll get round to doing a top end refresh one day
I did it hot though I hadn’t opened the throttle. There are other issues in that it runs and revs but will not pull when riding. I’m just checking different things to eliminate them. Rings and valves are next. 
Would you get that effect if the ignition auto advance wasn’t working properly?
It has electronic ignition. May be the coils. Yet to test.
Sounds like the carbs,
If it was jetted to run with no air filter putting one back in would change the settings
Yes, I changed them back
Quick look at the carbs again.
Throttle wide open.
L/psi 150 R/psi 125
Oil in each bore.
L/psi 175 R/psi 148
I’d say insignificant difference, not worth dismantling. It lost spark on one pot and somebody rode it like that for couple of miles; unburnt fuel is poor lubricant to say least, hence drop in psis…
