Out of the clear blue sky, my bike engine backfired and died the other day just riding some gravel roads. One minute runs great then bam. Turns over fine. Feels like it has good compression. I am not suspecting major mechanical damage, like dropped valve, blown head gasket etc. I can hear the fuel pump start up as well, and the gas tank is near full. Will not catch at all. Bike has less than 60 hours on it. Tested for spark by pulling plug, reconnecting and grounding to engine case, and it has spark. No overheating issues as I wasn't riding hard and it was cool out. I know from this board to look for damage to wiring (short circuits), but beyond that don't know where to start. Are there some likely culprits I should look for first? I searched the 4 stroke boards and didn't find anything directly like my case. Thank you,