I've just balanced my carbs in order to cure vibrations in the footrests and seat. The carbs needed minor adjustment but this hasn't improved the vibration problem.
The vibrations are only felt over about 3500 rpm, under this it is more or less vibe free. Also during acceleration there are no vibrations throughout the rev range. The large washer has already been fitted behind the exhaust mounting bolt and I've put a soft rubber washer underneath the front tank bolt which has stopped tank vibes.
I used the two jam jars with fluid method to balance the carbs and this was done with the engine at tickover speed. However, whenever the throttle was blipped, to ensure an accurate balance, the fluid levels in the jars changed quickly. Does this mean that at higher revs the carbs are out of balance ? Or is something else wrong, causing the vibes at higher revs ?
Your thoughts would be appreciated