Total Motorcycle Community Forums

This sucks. I got my bike on the road last week and its been running strong until today. Started bike up, and left it in the driveway to warm up while I went inside and suited up. When I came back outside, the bike was off. I go to start it again and it turns over, idles very roughly for a few seconds then dies. This process continues for several minutes until I realize the bike is only running on one of the two cylinders.

The bike ran fine all weekend and I rode about 100 miles without any problems. It just all of a sudden took a dump. I cant really tell if its a fuel issue or a spark issue.

Is there a way I could check for spark???

Could this be a possible issue inside the carb of the dead cylinder???

ok I was able to check for spark and there is definatly spark on the weak/dead cylinder.

So I guess its some sort of fuel or compression issue?

check your compression on that cylinder and fuel delivery, also check the plug and try switching the plugs from one cylinder to another

Well I figured it out. The carbs were rejetted at some point by a previous owner and the bike was running richer than normal. I recently did a tune up on the bike and put in new OEM spark plugs. The oem plugs were getting fouled. I put the old plugs back in which are a step hotter than oem and the bike ran again.

Im just relieved it wasnt anything major. Thanks for the advice.