5. Something Blocking Intake or Muffler Exit

Sealed Exhaust Pipe

In the tall tales of stored motorcycles, there exists a whole category of stories about owners who try to start their motorcycles only to discover that someone – usually of the rodent variety – has taken up residence in their airbox or muffler. These squatters usually decide to do a little remodeling or move in a bunch of furniture to their home, thereby restricting the airflow.

Then again, you may just have pranksters for neighbors. Check your muffler exit for a potato.