My 08 has slowly picked up a bad engine vibration. It's to the point where my hands are going numb. It can feel it at idle or on the gas. If you pull in the clutch on the freeway it goes away. Pretty sure it's not the tires and it much worse on the gas hard. What should I start looking for? Update: here is a list of the things I have checked. New Plugs TB's balanced Valves in spec Engine mounts checked. Compression is good. Things to check: Fuel filters ( they are pretty new but who knows) TB's ( found a used set for 129 off ebay) Using a socket extension I felt around the motor. There is no real vibration in the engine. Its all coming through the exhaust system from harmonics or rough running. When the engine and outside air is hot the bike is close to unrideable. Its not too bad when its really cold outside.