Cb500 four carb re-build

[Noelia]

Last night I've started dismantling the carbs, everything is out now, but I can't get them clean at all, I've soaked everything in cabs cleaner and then used a brush to help. But there is still rust or corrosion I don't know what's that stuck on the walls.

Any tips? 


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[matthewmosse]

I had a few stationary engine carbs like that and found a bit of washing up liquid and a sonic cleaning bath, mine was £30 or so at Lidl, so not anything fancy or expensive was enough with a toothbrush to scrub afterwards had the carb sufficiently cleaned to do its job. I had the sonic cleaning bat running for a whole afternoon mind, just for 1 carb, you have 4. Probably worth getting someone with better sonic cleaning baths than the cheap ones.

[Noelia]

What if i take them for professional cleaning? How much could it cost?


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[matthewmosse]

I think when my mate was offering this service he was asking £10 per carb, but that was a while back.

[Noelia]

I'm going to try soda blasting this afternoon. http://youtu.be/KULVhW2tw4I


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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.