Sitting on the bike the very left cylinder is missing on throttle. From 5-9/10 them picks up in the powerband but not fully.

I put k9 coils in no joy

Changed the plug, no joy

Cleaned fuel filter in pump, no joy.

Air filter is good.

K3 600 with 21k miles. Problem seems to have appeared quite suddenly.

It’s going down to Grady Saturday to get valve clearances done. And he says he should get a good idea on the dyno.

Anything else to rule out before I go down to him.