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Author Topic: 550K1 - carb rebuild set  (Read 2320 times)

Offline Erny

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550K1 - carb rebuild set
« on: June 20, 2019, 01:36:36 PM »
As I still have issues with my stock carb 022A (550K1 1975, USA model), I'm preparing for eventual rebuild

Can you please recommend proven source of carb parts (kit)?
I found one on 4into1 https://4into1.com/carburetor-repair-kits-complete-set-honda-cb550k-1974-1976/ - but not sure about quality
They claim kit comes from Taiwan

Ideally if I can buy it in EU due to taxes/shipping...

I want to buy at least needle valves, needles with clips and emulsifier tubes, viton rings
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CB750K7 US model (1977)
CB550K1 US model (1975)

Offline Raymond_Y

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Re: 550K1 - carb rebuild set
« Reply #1 on: June 20, 2019, 09:13:39 PM »
If you just want the o rings to rebuild the carbs you can buy them individually on eBay from specialist suppliers such as sealsuppliesuk at a fraction of the cost of the specialist kits.  I got enough for 6 sets of carbs for £20.  You also have the option to upgrade to Vito seal if you prefer.

Raymond
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Raymond

1971 CB500K0 (being rebuilt)
1977 CB550K3 (bases for future 650 cafe racer)
Q plate CB550 in bits

Offline Trigger

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Re: 550K1 - carb rebuild set
« Reply #2 on: June 20, 2019, 09:56:38 PM »
Order a carb kit from Cruzin and replace the o rings with Viton from Gerben in Holland. If you use nitrile o rings, they swell up on contact with modern fuel   ;) ;)
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Offline paulbaker1954

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Re: 550K1 - carb rebuild set
« Reply #3 on: June 20, 2019, 11:03:24 PM »
Quote from: Trigger on June 20, 2019, 09:56:38 PM
Order a carb kit from Cruzin and replace the o rings with Viton from Gerben in Holland. If you use nitrile o rings, they swell up on contact with modern fuel   ;) ;)

Absolutely 2nd Graham’s sound advice!!!
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Offline Erny

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Re: 550K1 - carb rebuild set
« Reply #4 on: June 21, 2019, 11:26:22 AM »
Thanks guys!

So, with regards to viton O-rings, I need to know sizes and qty used...

I've seen it some time ago on the forum (here or us) but cannot find it now..

I need this for CB550K1 (carbs 022A) and also for my CB750K7 (PD41A carbs)

Thanks!

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CB750K7 US model (1977)
CB550K1 US model (1975)

Offline Moorey

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Re: 550K1 - carb rebuild set
« Reply #5 on: June 21, 2019, 11:33:45 AM »
I was looking for the list of o rings sizes the other day and couldn’t find it either. Anyone know where it’s gone. I can’t remember if it was on here or the USA site.
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Offline Seabeowner

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Re: 550K1 - carb rebuild set
« Reply #6 on: June 21, 2019, 01:15:37 PM »
For 022A & 627B carbs I used.
Float valve      5mm x 1.5   
Main jet      3.5mm x 1.2   
Float bowl      68mm x 2.0  But found it a bit big on dia.   
Fuel tee      7mm x 2.0   
Drain screw  5.5mm x 1.5   
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1971  CB500K0  Candy Jade Green or Candy Gold
1973  CB500K1  Candy Ruby Red
1975  CB550F1   Shiny Orange

Offline Raymond_Y

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Re: 550K1 - carb rebuild set
« Reply #7 on: June 21, 2019, 01:26:19 PM »
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Raymond

1971 CB500K0 (being rebuilt)
1977 CB550K3 (bases for future 650 cafe racer)
Q plate CB550 in bits

Offline Raymond_Y

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Re: 550K1 - carb rebuild set
« Reply #8 on: June 21, 2019, 01:32:54 PM »
The sizes are also in the parts list, which lists the float bowl size as 67 x 1.9 and the fuel T as 7.8 x 1.9.

Raymond
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Raymond

1971 CB500K0 (being rebuilt)
1977 CB550K3 (bases for future 650 cafe racer)
Q plate CB550 in bits
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