Righto then, bike will be going back on Sorn end of this month.
Quick update
Popping and farting through the carbs, cant sustain idle, initially revs all over the place but always eventually idle drops and bike stalls out, no vacuum leak i can find but anyway would expect revs to rise not fall !
Re-cleaned Mk2a carbs
New spark plugs
New coil.......old coil tested high but the only real way to know is replacement.
Result, more popping and farting one very aggressive bang dislodged carb slightly.
Valve cover off, timing okay but redid a couple of shims which i were'nt to happy with, timing reset.
Same result.
Replaced carbs with Mk1 re-cleaned carbse
Result, popping and farting through the carbs and can hear a few in the exhaust.
Checked all ignition related wiring, all seems good.
Possibly CDI !!! but from what i can gather they either work or they dont.
So it seems i have a phantom problem that's evolved in the last 50 miles of testing carbs ??
Ordered a compression tester today cos i have a horrible feeling valve train is fookin around..
Quite a change from a perfectly running bike..
Been off this week and had to play musical chairs with the weather, seriously considering hanging me boots up but i'll get bored anyway so may as well fix the bassad...
So it's looking very doubtful to be carb related but cant get me head around how the problem has began to manifest when i changed the carbs ??
Pissed orf....