Originally Posted by
big john
My 6600 bike has done that on both shifters. I don't ride it very often and I have tried WD-40 but it gets gummy in there after the bike sits in cooler weather. The last time I used silicone spray lube and the shifters worked great after that. Turn the bike upside down and spray into the shifter at the base of the lever.
But then you have to bleed the brakes