SOHC.co.uk Forums > CB500/550
Float height 500 k1
Honda enthusiast:
Thanks both of you, Robert and Julie....I have an issue with the float valve springs which have softened with age. When the carbs were inverted the previous owner had set them bang on 22mm but when I set the bank on its side as you had previously written up, Julie the actual heights were more like 26mm. So I set them with your method and cleaned all the passageways with compressed air and carb cleaner can.
It's still running rich and won't start on full choke, when choke is half off it fires up , no fuel leaks but mixture screws have to be out three turns and it will also run with them screwed right out...there's black sooty deposits from out of the drain holes.
I've sent the Hendler kits back, they were rubbish as the main jets did not fit in the retaining clip. To get the float valve assemblies I've gone for Tourmax kits otherwise I'd have asked you for your slow jets, Julie...the air cleaner is new. While I'm waiting for the carb kits to come I'm going to set the points.
Any other ideas anyone 🤔
Thanks 😊
Nurse Julie:
Not all my bikes need full choke for cold start. Have you got the jet needles set in the correct notch? Do you know if the jet needles are the compatible ones for the jets?. The needles are profiled and if it's not seating correctly due to being worn, or the incorrect part, ie, aftermarket, it will always let fuel through at the incorrect rate. It's obviously over fueling because at full turns out on the mixture screws, she should be running very lean indeed.
davidcumbria:
I’ve seen reports of worn carb body where needle jet seats allowing leakage around the jet. Worth checking.
Honda enthusiast:
It's all original as far as I can see inside but the carbs aren't the originals of my 10000 mile bike, there's wear on the cable nipple holders indicating some more use than 10k...otherwise it all looks original with the oe stamps on the needle and jets.
Julie the needle is on groove four from the top, I understand that's where the US bikes were, is that right? The carbs aren't flooding so it's got to be the jets or needle position for it to run so rich?
I've Tourmax kits on the way, would you suggest an alternative fix?
Many thanks David and Julie 😁👍
mickwinf:
Having similar issues with Lazarus at the moment so have moved the needle to middle groove, haven't tried it out yet as our dog has had an operation so looking after her is taking priority over bikes!
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