My 2015 cbr300r has 4,000 miles and has done this three times so far I have shifted gears and let off the clutch to go and it just revs for a couple seconds then takes off I'm not sure what the problem is I have a feeling the clutch isnt disengaging and enganging properly because it likes to stick in nuetral and I have to let go of the clutch then pull it back in to get out of nuetral