22-03-21, 08:41 AM
Blocked pilot jets. I'll put money on it. 
The fuel is old, too, so that won't be helping. Strip and clean the carbs, no need to change jets or settings.
Also, while you have the carbs out, change the O-rings on the float needle valve seats.
The fuel is old, too, so that won't be helping. Strip and clean the carbs, no need to change jets or settings.
Also, while you have the carbs out, change the O-rings on the float needle valve seats.