Appreciate all your patience with my ramblings!!!
Triton Thrasher & Bernhard
; OK, so the opposite of what I was doing is true!!
So, I had, originally, a rich result on the plugs with the air screw 1 1/2 turns out, I could only get the bike to tickover well with the air screw 3 turns out which should have been leaning the heck out of the carburetion!!
I changed to a bigger PJ (from a 17 to a 15, correct me if I'm wrong but these new PJ's are measured in thousands of an inch so 15 is bigger than 17) which should richen the mixture but I had to re-adjust the air screw to 1 /1/2 turns to get a steady tickover, which should be creating a more rich running condition, my head hurts!!!
I wonder if originally the carb had an obstruction in one of the passageways, which would, I think, give a lean mixture and I compensated by turning the air screw out 3 turns?
When I changed the PJ from a 17 to a 15 I gave the carb another clean & maybe cleared the obstruction, hence the reason why the 15 seemed better! not because of the PJ change but because I cleared the obstruction.
Do I have the logic right hear regarding lean/rich, big/small, air screw in/out.
I always get this muddled in my mind, less air = rich, more air = lean, for some reason my brain always defaults to the other way around!!!
Once again I appreciate your patience and knowledge, I do/did know this stuff but I so rarely use the brain cells relating to carburetion they tend to, over time, go back to my incorrect default state!!!
OK, the plan is:
1. Remove PJ & airscrew to ensure passageway across carb is clear. Spray cleaner into the two small holes near the air intake, I'll use some guitar string to carefully poke around in the holes.
2. For my curiosity I'll put the 17 PJ back in & see how far I need to turn the airscrew out to get a steady tickover.
3. Consider using a hotter plug for the short, slow speed pottering around I'm doing & don't forget to change back if I plan on doing any high speed runs! (unlikely)