Hello, David House here. I've been the proud but frustrated owner of an 83 BMW R65 since December 2012. Rebuilt the carbs, replaced the coil and the engine runs great. But.... when I took it out for a test ride yesterday, was winding through the gears and from 4 to 5, the tranny made this sound of dogs and gear slots not meshing. Sound stopped upon deacceleration. The bike still shifts through the gears, but only at the lowest of throttle. If any torque is applied in any gear, the grinding sound occurs. Do I have a tranny rebuild on my hands? Any suggestions for a quick fix?