basically a mates runner, 180 engien with 125 barrel and piston, est is 180 transmission etc, standard exhasut and 25ml carb, running fine, had a gianelli freeway fine, scorpian fine, puts a standard runner exhast on to find it sparks out the rear when it rides ??? ideas
prob old carbon in the exhaust, just getting hot and burning off. often happens if you use shitty oil and dont rag/open up a engine properly, for a few weeks/months/years. should stop doing it after a good few rags. (alternatively you could take the exhaust off and caustic soda it, but thats boring! just rag it! lol) if it dont work.. its summat more serious lol.