Wondering if this tiny crack poon the carb. cover could cause a vacuum problem severe enough to cause the cylinder not to fire?
New plugs
New oil and filter
Valves in spec
Battery fully charged
Runs with air box off and screws set at 3ish. Once air box is on left side cylinder won't ignite.
At my wits end.
(http://images.tapatalk-cdn.com/15/05/28/9ad215536c3c5aab2f915b29f519daf0.jpg)