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Author Topic: Cracked top triple tree on CB360  (Read 4757 times)

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SSCR

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Cracked top triple tree on CB360
« on: October 10, 2008, 09:28:11 AM »
Well during the unconstruction of my CB360 I discovered that my triple was cracked on the left side. Lookin on ebay I didn't see one and I have seen these craked often before. Could this be welded or am I looking at something that will continue crack?
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Offline tbpmusic

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Re: Cracked top triple tree on CB360
« Reply #1 on: October 10, 2008, 09:46:36 AM »
It's a weak point with the CB360, always has been. Not sure why, but it's a pretty common dilema.
Keep watching EBay, one will show up.
Sadly, I don't have a spare myself - I know I need to look for one, but keep spacing it out.

bill
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"If you can't fix it with a hammer, then it's an electrical problem"

Bill Lane
 '71 CB450 Mutant/ '75 CB200/ '81 CM200/ '71 C70M

Offline kghost

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Re: Cracked top triple tree on CB360
« Reply #2 on: October 10, 2008, 11:21:54 AM »
I've welded (TIG) the top triple trees on a couple SOHC's.

After clean up and a bit of polish its indistinguishable from a new one.'

I have one thats been welded on a 750....fo far its been fine for 5 years now.

THe quality of the repair will depend alot on the welder skill
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SSCR

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Re: Cracked top triple tree on CB360
« Reply #3 on: October 10, 2008, 11:34:14 AM »
Any idea if any Honda 33mm triple top will work for the 360?
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Offline gerhed

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Re: Cracked top triple tree on CB360
« Reply #4 on: October 11, 2008, 09:22:19 AM »
Quote from: SSCR on October 10, 2008, 09:28:11 AM
Well during the unconstruction of my CB360 I discovered that my triple was cracked on the left side. Lookin on ebay I didn't see one and I have seen these craked often before. Could this be welded or am I looking at something that will continue crack?
I attach pic of my "repair " of cb360 top triple tree--not recommended, of course.
I obviously need a new one too, if you find two !

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Rides: 75 CB750F, 48 Indian Chief, 67 Triumph TR6, 63Honda CA95
          83 XL600R in CB360 Frame
          3-wheel electric tilting cycle

bartak

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Re: Cracked top triple tree on CB360
« Reply #5 on: October 11, 2008, 12:01:25 PM »
Quote from: SSCR on October 10, 2008, 11:34:14 AM
Any idea if any Honda 33mm triple top will work for the 360?

i used a set of trees from A 73 cb350 on a 74 360 looks a little different but works fine
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Offline crazypj

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Re: Cracked top triple tree on CB360
« Reply #6 on: October 13, 2008, 10:58:34 AM »
I guess Honda used a different material to cast the early CB360 top yoke as I have seen a bunch of them break through over tightening.
The bikes I bought had broken tops (but that was because the guy I bought them off 'helped' me strip them for transportation and re-tightened with air tools)
 I'm using CB350 twin top yoke but I'm pretty sure the CB350f, CB400f and CJ250/360 are all the same.(diameter and width)
 Just get something from earlier or later than 1974~75 as they seems to be the problem years
PJ
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SSCR

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Re: Cracked top triple tree on CB360
« Reply #7 on: October 13, 2008, 01:58:34 PM »
Good to know, I bidding on one on ebay now but just got out bid. PJ you would be proud, got the motor out today and will post pics. Man I love these old bikes, gotta start looking for a 350 now.
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SSCR

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Re: Cracked top triple tree on CB360
« Reply #8 on: October 15, 2008, 07:10:37 PM »
Got a another one on ebay last night. There is another on there going for 10 bucks right now if someone needs one!
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