My right side pipe is yellowing fairly quickly. I've had the bike a couple of years now though I've ridden a lot more this season that previous, and it's only now starting to yellow but only along the right side pipe. I saw in some other threads that might mean a lean mixture. What do you guys think? If I need to adjust the mixture, how many turns do you think will do it?
I think a lean mix usually causes blueing on the pipes, but maybe it could be yellow too.??
Are you experiencing excessive popping or backfiring when decelerating?
That can indicate a lean condition. Check the "Verses" for marbling or coastering in the exhaust section.
Here is a spark plug color picture to help "read" your plugs.
You want a light tan or gray color on the ceramic insulation.
Too light or white indicates a lean condition.
Black or soot indicates rich/flooding or burning oil.
The air/fuel mixture is factory speced at 1 5/8 turns out for US bikes.
Try 2 1/2 turns and test ride. Increase 1/4 turn at a time if needed. 3 1/2 turns max. Screw falls out at 5 turns. Seal with dab of silicone when adjustment is done.