« previous next »
Pages: [1]   Go Down

Author Topic: Replacing brass parts in petcock. (CB500, some 550's and 750's.)  (Read 5875 times)

0 Members and 1 Guest are viewing this topic.

Offline papp101

  • Enthusiast
  • **
  • Posts: 174
Replacing brass parts in petcock. (CB500, some 550's and 750's.)
« on: March 24, 2009, 12:08:14 AM »
The brass bits on my petcock were done for! It had a brass drain tube that was completely cracked, and a missing brass fuel line nipple/barb. So I made a set.

Hopefully if anyone ever has a similar situation, they can just jump in a try things like this as brass is easy to work with and fairly cheap.
























7/16" brass tube and 1/4" brass barbed compressor fitting. Both tapered and tapped in with a small hammer.
Logged

Offline TwoTired

  • Really Old Timer ...
  • *******
  • Posts: 21,805
Re: Replacing brass parts in petcock. (CB500, some 550's and 750's.)
« Reply #1 on: March 24, 2009, 12:25:46 AM »
Nicely done!
Logged
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline papp101

  • Enthusiast
  • **
  • Posts: 174
Re: Replacing brass parts in petcock. (CB500, some 550's and 750's.)
« Reply #2 on: March 24, 2009, 12:41:31 AM »
Thank you sir! Always willing to contribute the cheap way of doing it!
Logged

Offline hopterfixer

  • Hot Shot
  • ***
  • Posts: 520
    • My flickr Gallery->
Re: Replacing brass parts in petcock. (CB500, some 550's and 750's.)
« Reply #3 on: March 24, 2009, 03:25:48 AM »
I did the same thing to the "main" tube in the tank, mine was split all the way down the side.  Nice work.
Logged

CU2151

  • Guest
Re: Replacing brass parts in petcock. (CB500, some 550's and 750's.)
« Reply #4 on: March 27, 2009, 04:46:36 PM »
This is exactly what I am needing to do!  I bought the bike without the reserve tube and without a functional speedo, so running out of gas was a very real possibility.  Thanks for the pics, it will really help out! ;D
Logged

CU2151

  • Guest
Re: Replacing brass parts in petcock. (CB500, some 550's and 750's.)
« Reply #5 on: March 27, 2009, 04:56:07 PM »
I've heard of soldering the reserve tube in place...have you heard of this?  Is it easier to just taper it and tap it in with a hammer?  Should I use JB Weld or anything else to ensure seal?

Logged

Offline mystic_1

  • Really Old Timer ...
  • *******
  • Posts: 6,071
  • 1970 CB750K
Re: Replacing brass parts in petcock. (CB500, some 550's and 750's.)
« Reply #6 on: March 27, 2009, 05:30:43 PM »
Well done!  I like your lathe ;)

Maybe some Red Loctite would be good here?

mystic_1
Logged
"A ship in harbor is safe, but that is not what ships are built for."
- John Augustus Shedd

My build thread:  http://forums.sohc4.net/index.php?topic=68952.0

masonryman

  • Guest
Re: Replacing brass parts in petcock. (CB500, some 550's and 750's.)
« Reply #7 on: March 27, 2009, 06:38:00 PM »
 My vote for creative use of tools. My calipers only have a round dial with little numbers, not the BIG digy numbers, I guess I'll have to find another way...


Nice work with what you have


Mark
 
Logged

Offline riotmachine

  • Full Member
  • *
  • Posts: 13
  • Live Forever or Die Trying
Re: Replacing brass parts in petcock. (CB500, some 550's and 750's.)
« Reply #8 on: July 23, 2009, 12:48:59 AM »
what size are the bolts that attach the petcock to the tank? i'm missing those from my rebuild kit.
Logged

Offline robdrobd

  • Who? Me?
  • Master
  • *****
  • Posts: 1,519
  • Isn't she a beauty?
Re: Replacing brass parts in petcock. (CB500, some 550's and 750's.)
« Reply #9 on: December 31, 2013, 08:30:41 AM »
How did you taper the tube? Also, where can I get the tubing ? Home Depot ?


Sent from my iPhone using Tapatalk
Logged

Offline robdrobd

  • Who? Me?
  • Master
  • *****
  • Posts: 1,519
  • Isn't she a beauty?
Re: Replacing brass parts in petcock. (CB500, some 550's and 750's.)
« Reply #10 on: December 31, 2013, 08:31:21 AM »
Sorry, I responded to a four year old post . :)


Sent from my iPhone using Tapatalk
Logged

Offline Stev-o

  • Ain't no
  • Really Old Timer ...
  • *******
  • Posts: 34,435
  • Central Texas
Re: Replacing brass parts in petcock. (CB500, some 550's and 750's.)
« Reply #11 on: December 31, 2013, 08:47:08 AM »
Quote from: robdrobd on December 31, 2013, 08:30:41 AM
How did you taper the tube? Also, where can I get the tubing ? Home Depot ?


Sent from my iPhone using Tapatalk

I would try a plumbing supply store
Logged
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline 70CB750

  • Labor omnia vincit improbus.
  • Really Old Timer ...
  • *******
  • Posts: 14,830
  • Northern Virginia
Re: Replacing brass parts in petcock. (CB500, some 550's and 750's.)
« Reply #12 on: December 31, 2013, 08:56:41 AM »
Quote from: riotmachine on July 23, 2009, 12:48:59 AM
what size are the bolts that attach the petcock to the tank? i'm missing those from my rebuild kit.

I know it is M6 on my CB750.
Logged
Prokop
_______________
Pure Gas - find ethanol free gas station near you

I love it when parts come together.

Dorothy - my CB750
CB750K3F - The Red
Sidecar


CB900C

2006 KLR650
Pages: [1]   Go Up
« previous next »