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Author Topic: Replacing brass parts in petcock. (CB500, some 550's and 750's.)  (Read 4075 times)

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Offline papp101

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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.

Offline TwoTired

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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!
Lloyd... (SOHC4 #11 Original Mail List)
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Offline papp101

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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!

Offline hopterfixer

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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.

CU2151

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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

CU2151

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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?


Offline mystic_1

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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
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masonryman

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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
 

Offline riotmachine

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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.

Offline robdrobd

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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 ?


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Offline robdrobd

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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 . :)


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Offline Stev-o

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Re: Replacing brass parts in petcock. (CB500, some 550's and 750's.)
« Reply #11 on: December 31, 2013, 08:47:08 am »
How did you taper the tube? Also, where can I get the tubing ? Home Depot ?


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I would try a plumbing supply store
'74 "Big Bang" Honda 750K [836].....'71 Honda 750K project.....'76 Honda 550F.....K3 Park Racer.....K5 Fiddy Dolla Special!......CB500 Fiddy Dolla Special too!!............plus plus plus.........

Offline 70CB750

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Re: Replacing brass parts in petcock. (CB500, some 550's and 750's.)
« Reply #12 on: December 31, 2013, 08:56:41 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.

 

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