Misfire following manual cct adjustment

[bucklandswifty]

Hi everyone

Having fitted manual cct's I foolishly adjusted them up a bit tighter to hear what effect it had, all sounded okay until I had done an 18 mile ride, switched off for about 10 minutes, returned to a hot engine and it was a bugger to start\turn over. Checked here and sure enough over tight cct's. I followed the instructions here implicitly to adjust them, rear cam cover off, timing marks etc. I don't think for one moment the chain could have jumped, I only wound them out and in not removed them, and I am certain the TDC firing strokes were correct. Now I have a continual misfire on cruise and deceleration. It's quite hard to describe, not a spluttering misfire, more of a burbling sound; it feels okay on acceleration though. I shall remove the tank this weekend and have a look for obvious things in the air leak department. I do have vacuum pipes fitted and blanked off, rear one is teed to fuel tap and correctly attached to horizontal port. I am wondering if the front cct is too tight, I did do the feel test on the rear pot whilst observing the deflection on cam chain, then repeated on front by feel. I found the “tightness” and then back off three flats of the nut was good. I am sure it is far slacker that it was before I started. My brain hurts!

Any ideas as to what I have cocked up gratefully received!

Cheers - Chris