Hello All, Recently pulled my bike out of storage and have gone over many things to get her going strong again. Was just out riding and after 15 or so miles of hilly ( paved ) back road rompin, there was a loud clunking that came from the engine as I accelerated up a hill at about 35 mph. Then it stalled. Got it to start again after cooling down ( was near overheating). Got it home about 10 miles away and it still would go ok 45+ mph... it knocked loud the whole way home... Pretty sure something broke. What should I tear apart now?