god dam tree rats... i had a2007 bmw f650gs come into our shop by moto limo. the rider just left toronto bmw for a oil and filter change. he got on the 401 and his bike died. i pulled off the upper plastic to check for spark at the plug, when i cranked the engine over, lint and fibers came out the spark plug hole ( i got a spark ) now i had to pull off the snorkel to the air box only to find the air filter sucked inside. air filter was clogged solid, next, pulled air box off to clean and found a face cloth in the throtle body right up to the intake vales. i used compressed air to back flush the cylinder,threw it together and the rider was off a happy camper. god dam tree rats.