SOHC.co.uk Forums > CB500/550
CB550k1 US Import - UK registration
juitz:
Hey all, what is the petcock nut size for a cb550k1?
I think it's 18mm but the two I've purchased don't fit.
I could just buy an OE one but would prefer to save £20 😉
Or would one of these be ok to use? The body on mine is ok, it's got the dual output but the tube, orings and gauze are stuffed.
https://www.ebay.co.uk/itm/224064453335?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=_p-q3hvvQhS&sssrc=2349624&ssuid=eMi7QkCfTHq&var=&widget_ver=artemis&media=COPY
davidcumbria:
This is what I’m thinking of for mine. Reckon it’s a 20 mm connection
https://www.amazon.com/CB400F-CB550F-CB550K-CB750F-CB750K/dp/B0B6F2CG8Y/ref=sr_1_1?crid=2G5O57QHYL1TP&keywords=CB550+tap+20mm&qid=1685863363&sprefix=cb550+tap+20mm%2Caps%2C196&sr=8-1
juitz:
--- Quote from: davidcumbria on June 04, 2023, 10:32:33 PM ---This is what I’m thinking of for mine. Reckon it’s a 20 mm connection
https://www.amazon.com/CB400F-CB550F-CB550K-CB750F-CB750K/dp/B0B6F2CG8Y/ref=sr_1_1?crid=2G5O57QHYL1TP&keywords=CB550+tap+20mm&qid=1685863363&sprefix=cb550+tap+20mm%2Caps%2C196&sr=8-1
--- End quote ---
Cheers. Ended up getting one from 4into1 along with some new main jets. Cheaper option than new or the repair kit.
juitz:
Hey all!
Took my cb550 project bike out for its maiden ride today. Aside from the panicked moment I had when the bike sputtered and stopped, then realised I had previously turned off the petcock it went well.
Carbs need further tuning but I am hearing quite a distinct rattle sound at higher than 2000rpm. Varies if accelerating or not but it's there. It kinda sounds like a chain is rubbing? I have a new timing and cam chain and have adjusted the cam tensioner twice.
As I don't have a previous baseline, im not sure if this is normal? Anything else that I could be?
davidcumbria:
Do you have the updated valve cover with pegged rocker shafts ?
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