I recently purchased a Kawasaki Voyager 1700 that had been triked out with the Motor Trike Challenger kit by the dealer. Since day 1 the rear brakes have needed to be pumped to get anything resembling "brakes" in the rear. I notified MT and they said to give it 1000 mile to let things break in and take it back to dealer for the 1000 mile check and have them bleed them. I took it in at 1600 miles and everything was checked out and the brakes were bled but they are no better. The dealer is waiting on a call back from MT on how to solve this problem. He says it may need a larger master cylinder. It seems I have read about that on others posts. Can somebody here tell me how big the Kawasaki Master Cylinder bore is and maybe what size I may need to go to? And then even where this might be purchased?