Post by locomoto on Sept 27, 2023 14:13:22 GMT -5
I have a 1983 Yamaha XS650 Heritage Special. The motorcycle ran perfectly for years, and after being stopped for a month it began to fail, producing misfiring in low RPM, in the left exhaust pipe only. This is when the motorcycle is stopping at a traffic light for example. Once at speed the problem disappears. I have replaced the spark plugs and their cables, the coil, the fuel petcock, and I have cleaned the carburator with Seafoam motor treatment, several times, without disassembling it. The problem continues. Any advice to solve this problem? Thanks.