I recently took the engine out of my bike disassembled it swapped the transmission for a pre 2008 transmission. I then added a kick start assembly to my 2016 klr. I then went through reassembled everything double and triple checked the timing of the cams put it all back together and back in the bike but it won't start. My carb is getting fuel the vacuum tubes are working I'm getting spark I can smell a bit of fuel from the exhaust. It just won't start any advice is appropriated.