I recently picked up a 96 Techno 250. Being a 4-stroke guy, I thought nothing much of the fact that the bike popped a bit at idle and/or slightly cracked throttle. Now that my neighbors are complaining, I decided to investigate and have found that this, in fact, is not normal...
I have completely cleaned the carb, installed a new plug (BP5ES), gas is 92 (R+M)/2 (95 RON) with 75:1 mix. Starts easy, runs good, plug doesn't foul, no excessive smoke. It pops whether the engine is cold or hot (which tells me the pipe isn't igniting unburned fuel). What could be causing the backfiring??? Any help appreciated.
thanks.
-RussD