Took my jonway 125 for it's mot today and it was fine on the way there. It passed fine but on the way him it started loosing power and backfiring then stalling on me. Got it home eventually and then couldn't get it started. Checked the spark plug and there's plenty of spark, checked for compression by ticking it over and putting my thumb over were the spark plug goes in. And also made sure fuel was getting to the carb which it seemed to be! Then as trying to start it the was a massive bang from the exhaust! Shit meself and put it away for the night, and ideas or help would be much appreciated ;-)
