SOHC.co.uk Forums > CB500/550
CB 500 K1 running issue
Sesman:
Must admit. Turning the air screws on mine makes little if any difference to the engine rpm.
Beefington1975:
Just a thought...saw someone on another thread suggest that engine oil level could be a factor? I've checked mine and it's on the top line. The deposits on the plugs look dry, but could the fouling be due to excess oil???
deltarider:
What exactly is sooted? The thread's end? That's normal. Focus on the plugs nose, the ceramic insulator that is. Realise the CB500s plugs soot very easy at idle. Back then we used to ride these bikes. Nowadays and in this forum in particular, more and more owners seem interested in having a perfect idle they can listen to sitting in a deckchair. ;)
McCabe-Thiele (Ted):
--- Quote from: Beefington1975 on September 20, 2022, 08:19:51 PM ---Just a thought...saw someone on another thread suggest that engine oil level could be a factor? I've checked mine and it's on the top line. The deposits on the plugs look dry, but could the fouling be due to excess oil???
--- End quote ---
I would only expect a high oil level to become an issue at high engine rpm due to excessive oil misting
Beefington1975:
--- Quote from: deltarider on September 20, 2022, 08:48:13 PM ---What exactly is sooted? The thread's end? That's normal. Focus on the plugs nose, the ceramic insulator that is. Realise the CB500s plugs soot very easy at idle. Back then we used to ride these bikes. Nowadays and in this forum in particular, more and more owners seem interested in having a perfect idle they can listen to sitting in a deckchair. ;)
--- End quote ---
Both the centre and end electrodes are sooted. Listening to it from a deck chair is not my aim...but it is all that's possible at the moment. It won't even make the move from 0 to 2 mph without cutting out.
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