I don't think this has been talked about in this forum-----but my bike since new starts just fine hot or cold--if you don't touch the throttle. If you do it makes an extremely loud banging noise as if you were hitting the side cases with a ball peen hammer---really unnerving. So you might say--well, just don't touch the throttle !! Well that's fine unless I tip over and flood it--then you have to hold some throttle to let it clean out the flooded carbs---man it sounds like the rods are coming thru the cases---you can hear it a block away. I know there is a throttle postion sensor that advances the timing when you pull the throttle--maybe it is way out of adjustment--I don't know ??? I've tried to make my buddies do it--and his was just fine--you couldn't make his do it. I did talk to my mechanic at the KTM shop on the phone and he has heard some of them do that--not sure if he's up on it or not--but he did mention the throttle position sensor and wants me to bring it in. I was hoping someone here would have some advice and I could take care of it when I adjust the valves very soon. I would appreciate any advice.