Got it almost back together, all shimmed up, just waiting on a cam cover gasket.
Couldn't resist doing a compression test on No.2 140psi. much better than 50.

Mark, check your Clean Air System. On mine the vacuum solenoid is knackered and is always open regardless of how much or little vacuum is applied so the airbox is always feeding air into the exhaust. The reed valves work but the inner gasket on cyl 1/2 was broken and it was a bit of a mess in there....

Thanks for clearing that up Al.
Probably to stop the spring trying to tie itself in a knot when you put the end bolt on.

I have taken the tensioner out with the carbs still on but it was bloody difficult to get that long spring back in,it took so long I wish I had taken the carbs off!!! I have no idea how you mananged that, patience of Jobe of a very full swear box? One puzzler with the tensioner, the FSM mentions a ...

With the low seat height there is no room. Managaed to split the cam cover with the coils in place but will probably take them out anyway

Not the inlet, must have been my imagination or the reed valves are weeping along with the vacuum solenoid clean air thingy and getting back to the pipe in my gob. Anyway 1754751946315.jpg So 2 inlets are justin and 2 ,justout, his half brother. No exhausts are in tolerence with no.2 being the illeg...

Rigged something up, not very scientific and couldn't be used to do a leakdown test but a way of getting air into the cylinder. 1754497389085.jpg It was leaking but was hard to hear from where then I realised that the vac pipe for the tank tap is cyl 2. Couldn't hear anything but sticking it in my m...

Thanks Alan

125/1
50/2
145/3
150/4

This is on a cold engine.
Need to try and rig my compressor to the spark plug hole using my cheap compression tester with wierd quick fit fittings and do a leak down test.

Thanks John. Haven't got to mist a gloss over my satin yokes then.

So if the forks and frame are gloss that would suggest the yokes and centre stand would also be gloss?

Also if all the engine covers are gloss, using the same thinking, the cam cover would be gloss?

Or am I talking cobblers?

Thanks for the reply Mark. The Zeph starts cold with choke or hot without instanly and ticks over fine. I'll try a compression test first, then a leakdown test and see what the results are.
Cheers

Been playing with the Zeph11 again. I got it running decent with a lot of help from Al and others on here but always a bit fluffy on low revs pick up under load. Carbs off again (Keihin CVK34), another clean of the pilot circuits. Result was a bit better. Balanced them to within 1 cm of Hg, Played w...

Is the reason for this initial post due to low compression or seized piston? Has it been stood inactive for a while? Does it start? If it starts and runs ,ride it and once warm wind the revs up from time to time. When I bought my ST that hadn't run for over 10 years it smoked like buggery and you co...

Thanks very much to both of you