First timer here. I am looking for some insight about my bike. I was at the track today and had some issues. My bike wants to not stay running when in gear unless i am actually riding it. it also kicked me back a few time when trying to kick it over. I did notice after riding a creamy type of fluid that seamed to be oil based coming from the engine breather tube and my radiator fluid has gotten low. I do not see any leaks from the radiators. it also back fired on me when i would try to start iot in gear. Does anyone have any clue as to these issues? Thanks for the help!