Hey all- I´m looking for a discussion forum for the 1985 Honda CB650SC. We nearly got one running this past weekend except one of the cylinders isn´t playing well with the others. It has a new spark plug and gets spark, we cleaned the carbs, the other cylinders fire up fine. We are wondering if it could be a compression issue or if some aspect of the valves is way out of whack. Any ideas or suggestions would be greatly appreciated.