Motorcycle Repair: 1993 yamaha virago, air leaks, air leak

Question
just bought great shape very well cared for 12k miles  problem is it is hard to keep at a constant rpm (at idle sometimes it goes high and while riding it will stick on its own) i adjust as needed but after awhile it slowly comes back down and becomes too low. My thinking is the carbs are dirty huh...easily starts no problems otherwise. what trick could i try if any  thank you


Answer
Hi Mike,

The carburetors may be varnished a bit, or an intake air leak may be present, or the synchronization may be off, or other.

Inspect the carburetors for evidence of varnishing. Check for air leaks and check synchronization.

Respectfully,
Mark Shively