I've got an exhaust leak right out of the rear cylinder on the right side. Took off the clamp and saw the metal ring somewhat rusted, so it doesn't fit tightly any more. I would like to fix this without taking the whole bike apart. Someone suggested JB Weld. I've used it before in different applications, but not in such a hi-temp spot. Will it work where the exhaust is coming through at its hottest? Is there some kind of RTV caulk that will stand these temps?