Hi
I am new here and hope i can get som tips.

I have a problem with my RG 250, When it run it back fires an "explodes" and shoot a flame out of the exhaust pipe. And the left cylinder dont get hot when it runs. I have checked the spark plugs and they do spark.

Before al this happend when i drove in rain i saw a spark between the cable from the coil and the sparkplug cap.

I have cleaned the gas tank beacause it was rusty but i don`t think that hlped on my problem.

Thanks for answers.