1982 Honda CB450SC Nighthawk Dies at Idle?
I recently bought a 1982 Honda CB450SC Nighthawk, and upon purchase, it started up, idled, and ran just fine. The only major issue was a sticky throttle. Since then, I have adjusted the throttle, which now works fine, however the bike will now die at idle. I was told the carbs were cleaned immediately before being sold, and again, it initially started fine.
I have attempted to adjust the idle stop screw, however my battery died on me before I could see any real results. In my research, I have learn there's also an idle mix screw, but I'm unaware where it is located on my bike.
If nothing else, I can take it in to my local mechanic, however, if it is something I can take care of myself, I would prefer to. Any other ideas would be appreciated.
If your battery died while the bike was running then your charging system isn't working.
They didn't clean it at all or properly. Check the plugs. Check the fuel line. Check to see if the gas cap is tight.
Hondas won't run with a weak or dead battery. Replace the battery if it won't hold a charge and check the charging system to make sure it charges the battery as you drive. Good luck with the idle and fuel mix adjustment. Unless you are skilled at balancing carbs, don't mess with that.
If it started and ran fine initially, the problem is most likely in the work you did.
Recheck the throttle cables.
All my Hondas had adjusters on both cables (throttle end).
Put a full charge on the battery first.
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