68’ T120 with a CB350 front end. - The Jockey Journal Board

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Old 09-20-2020, 05:54 AM   #1
rfranks82
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Default 68’ T120 with a CB350 front end.

Hi all, looking to run a 1969 cb350 front end on a 1968 T120. In trying to find out if triumph and Honda bearing are the same size? Also the flange on the top of the neck on the triumph frame gets in the way with the upper triple tree from Honda. Please help. Thanks.
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Old 09-20-2020, 10:06 AM   #2
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Default Re: 68’ T120 with a CB350 front end.

Yes...the flange will likely get in the way....cut it off if you must. No the bearings aren't the same...you're probably better off machining a new steering stem to fit the Truimph bearings than hoping that you can match metric bearings to a British frame. There is also the question of steering stem length. You will also need to sort out some steering stops that'll work. It can be done, but not without a bit of engineering and machining skills.
On the other hand...if you don't know what you're doing, it would be well worth the effort to locate a proper Triumph front end....it might make the difference from you enjoying life with the machine, or spending a lot of time in a hospital bed.
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Old 09-20-2020, 11:51 AM   #3
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Default Re: 68’ T120 with a CB350 front end.

> it might make the difference from you enjoying life with the machine, or spending a lot of time in a hospital bed.

I know which I'd choose. Hospital food is the best!
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Old 09-20-2020, 12:15 PM   #4
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Default

It should be fairly simple making new cups for bearings and cutting or adjustments
You need to do comparisons between both
Sorry I can’t help further
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Old 09-21-2020, 02:42 AM   #5
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Default Re: 68’ T120 with a CB350 front end.

"looking to run a 1969 cb350 front end on a 1968 T120".

why?
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Old 09-22-2020, 03:21 PM   #6
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Default Re: 68’ T120 with a CB350 front end.

I think a better choice would be a 35mm Honda 450 (DOHC), 500/550 or 750 fork. Buy the 1" conversion cups and bearings from LowBrow. Send the clamps to Red at CycleOne and have a 1" stem installed. You can do this with the 350 fork too, but parts for a 69 350 fork at getting pricey. Even easier would be to find a 39mm Harley fork or a 35mm with a 1" stem.
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Old 09-22-2020, 04:40 PM   #7
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Default Re: 68’ T120 with a CB350 front end.

Why do any of those things? Look for Triumph forks, they're not exactly hen's teeth.

'68, '69, '70 have the best drum brake I've used. If you go with later Tri forks, embrace the certainty of having to mess around with them to get them to fit.
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Old 09-22-2020, 04:55 PM   #8
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Default Re: 68’ T120 with a CB350 front end.

Sure, there are better options.

But, maybe he has the parts and wants to make it work.
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Old 09-22-2020, 06:37 PM   #9
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Default Re: 68’ T120 with a CB350 front end.

Quite right, of course. But then the OP is faced with the work that Goldy mentioned. (Of course maybe his skills and access to machinery make that the easy alternative. Guess I'll shut up now.)
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Old 09-23-2020, 10:14 PM   #10
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Default Re: 68’ T120 with a CB350 front end.

I put a sporster front end on my sons 69 TR6. Turned sliders smooth and welded a tab on the right one for the Triumph hub and brake. Makes for a clean front end and no worry about finding parts. Why a sporty front end? thats what he wanted on it. Any good machine shop can take care of you.
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Old 09-25-2020, 02:40 AM   #11
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Default Re: 68’ T120 with a CB350 front end.

I matched up a Z250 fork legs to my Daytona using tapered bearings and the original twin leading break works a treat better suspension then the originals
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Old 09-25-2020, 12:06 PM   #12
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Default Re: 68’ T120 with a CB350 front end.

>better suspension then the originals

There is that, for certain. I stuck a disc-braked Yam 650 front end on my favorite Triumph + loved it.

To begin with, though, I ran it with stock trees (Tri or BSA, year/model a mystery) opened up to 35mm. I do not recommend that anybody do likewise. The forks tweaked visibly when you got on the brake hard. I soon found an old set of Ceriani trees with Triumph stem and went to Timken bearings while I was at it. Happy ever after.
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Old 09-25-2020, 03:00 PM   #13
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Default Re: 68’ T120 with a CB350 front end.

So what is it called when someone (rfranks82) posts something and never comes back or updates?
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Old 09-25-2020, 03:05 PM   #14
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Default Re: 68’ T120 with a CB350 front end.

Perhaps it's called We Scolded Him to Death. Or substitute "Bored."
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Old 09-25-2020, 03:37 PM   #15
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Default Re: 68’ T120 with a CB350 front end.

Quote:
Originally Posted by Ratso View Post
Perhaps it's called We Scolded Him to Death. Or substitute "Bored."
Or maybe he's making it fit, hopefully he comes back.
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