SOHC.co.uk Forums > CB500/550

Cb500 four carb re-build

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Toe_Jam:
Hey Noelia,

I guess you have sorted this now but will reply for anyone searching in the future. I think this is Aluminium Oxide, usually caused by water ingress. My number 4 float bowl was caked and I had the same difficulty getting rid. However, a QUICK brush with 15% hydrochloric and a thorough rinse completely removed it. I had before and after pictures but they were on the phone I lost (along with all my build pictures to date).

Hope this helps anyone in the same predicament.

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