Topic: O Ring source for fuel use-petcock-CB550K

[newday777]

Mine are coming in tomorrow

[Duanob]

When I needed a rebuild kit I couldn't find one to save my life. I bought the 4in1 version and it works great. I have my original and it would be great to rebuild it but not only does it have the Orings, the nylon washer and cone should be replaced as well. I can't find thise anywhere.

[newday777]

Ah, I see: does the 2x18mm size fit that face seal? If it does, I'll order up a batch of them at Rocket so we can get them without spending $20 each for them.

Nope not 18mm.
The one surviving from the K5(pre 2010)I have is
     2mm x 18.72mm ID x 21.67mm OD

I opened the petcock today that I put on the K5 in 2019, bought from South Sound.
     1.94mm x 18.49mm x 21.85mm

I picked up the ebay orings today.
They measure 1.78mm x  18.86mm ID x 22.18mm

I have the rebuilt petcock on the K5 now, testing with fresh non ethanol Sunoco 94.
10 minutes no leak so far.

[denward17]

^Stu, is your test with the new o ring just delivered from EBAY?

[newday777]

^Stu, is your test with the new o ring just delivered from EBAY?

Yes it is. And put in the new Honda 16952-341-671 filter sock kit.

[denward17]

Installed new o ring today in OEM petcock and installed on tank.  The o ring came from the ebay link listed previously in this thread.

So far after about 4 hours no leak.

[HondaMan]

Ah, I see: does the 2x18mm size fit that face seal? If it does, I'll order up a batch of them at Rocket so we can get them without spending $20 each for them.

Nope not 18mm.
The one surviving from the K5(pre 2010)I have is
     2mm x 18.72mm ID x 21.67mm OD

I opened the petcock today that I put on the K5 in 2019, bought from South Sound.
     1.94mm x 18.49mm x 21.85mm

I picked up the ebay orings today.
They measure 1.78mm x  18.86mm ID x 22.18mm

I have the rebuilt petcock on the K5 now, testing with fresh non ethanol Sunoco 94.
10 minutes no leak so far.

Hmm..those numbers suggest a 2x20mm size(?). I haven't installed the petcock yet on the [book's] 550 in the garage (because the tank isn't painted yet), might see if that size will work on it (?).

I hate to see us all having to pay whole $ for O-rings when they are less than 50 cents in any quantity.
I'm a cheapskate.

[denward17]

Mark,
The one I received from Ebay was 1.7mm x 19mm, to fit the 550 petcock.

[HondaMan]

Mark,
The one I received from Ebay was 1.7mm x 19mm, to fit the 550 petcock.

I'll see if I can get that size, too. The local seal shop can get almost any size made if I buy 100+ of them, and then they are 50 cents or something like it. That's how I make those O-ring kits for these bike engines (which no gasket set has).