Just seeing if anyone has any ideas on this. My friend has a cb900f. It had been sitting for about 10 years when he got it. I did all the usual things, cleaned the carbs, new plugs, rebuilt the master and calipers etc. It runs great, but after a while it fouled plugs 1 and 2.
What are things to look for that cause this? It doesn't smoke so i don't think it's oil fouling them. It runs great with new plugs, Timing is spot on. We havent replaced the plug caps yet but that is next on the agenda.
