I was passing a couple of cars today just left from my house and went into 5th and as I was just letting it pull hard I felt a bump feeling . Im sure it wasnt the engine . I have stage 7 morley kit and did the double D clutch mod over a year ago. In the back of my mind Ive always been worried if when doing the double that I tightened the bolts up enough when installing that. I feel like I did. Could this be a shaft issue possibly ? I kept riding and I would accelerate pretty decent around town in lower gears but didnt experience it again . I accelerated pretty hard in 5th on the way home and felt nothing but I didnt stay in it like before when I noticed it . Any ideas ??