by Leardriver » Mon Apr 13, 2020 8:49 am
Since you were riding it when it quit, all of the usual gummed-up carb issues are not my first thought. This is going to require a little more methodical approach.
Are you getting spark? Next, is your valve timing correct, using the left side inspection mark and correct cam marks? Something could have slipped.
If the first two items are OK, then remove the air filter and use a blast of starting fluid into the carb bell, and kick it to see if you can get it to fire for a second. Starting fluid is not my favorite stuff, but for a diagnostic aid to see if carburetion is the problem, brief usage is ok.