Number one for grinding in 1 gear is an incorrect linkage adjustment. Just getting the pin through all the holes doesn’t mean it’s correct. Sometimes you have to make the rod a bit longer to get the adjustment needed.
One more question, Yellow Rose. I'm getting closer to dialing in the shift linkage. 4th to 3rd still grinds 'just a little' after two turns out on the shift linkage. What happens when the shift linkage is adjusted too long?
