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Very many thanks. Good to understand. I get some plug sooting but probably a combination of general wear, valve guide seals, and jets worn slightly oversize. It seems to be getting better with more decent longer runs, but fresh jets would be a nice treat in future.
Quote from: JezzaPeach on August 22, 2022, 04:56:57 PMVery many thanks. Good to understand. I get some plug sooting but probably a combination of general wear, valve guide seals, and jets worn slightly oversize. It seems to be getting better with more decent longer runs, but fresh jets would be a nice treat in future.The carb needle jets wear out far quicker than other jets due to needle vibration from the engine when the throttle slides open and close.Most people ignore them and waste cash on the easy to change jets instead, just like I did with my CB750.New needle jets instantly cured my lumpy slow running and sooty exhaust problems.You probably require 1601-232-3004 needle jet kits X 4.Not cheap for a CB500K1 tho...
Bet you can’t. Try passing a 0.2mm then .3mm wire through a clean jet. If it goes through, there is no spiders web.