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Author Topic: Moto Martin GSX 1260 -82  (Read 2245 times)

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Offline DME

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Re: Moto Martin GSX 1260 -82
« Reply #25 on: November 11, 2024, 12:31:11 AM »
Question:
"How wide is the frame of a Moto Martin GSX?"

Answer:
"Yes"  ;D



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Online BenelliSEI

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Re: Moto Martin GSX 1260 -82
« Reply #26 on: November 11, 2024, 06:37:29 AM »
Quote from: DME on November 09, 2024, 11:07:31 AM
As far as I know the frame is made of brazed (not welded) thinwalled chromemoly tubing and finished in nickel plating  :)

Just like the Rickman CR.
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Offline grcamna2

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Re: Moto Martin GSX 1260 -82
« Reply #27 on: November 11, 2024, 10:24:24 AM »
Quote from: BenelliSEI on November 11, 2024, 06:37:29 AM
Quote from: DME on November 09, 2024, 11:07:31 AM
As far as I know the frame is made of brazed (not welded) thinwalled chromemoly tubing and finished in nickel plating  :)

Just like the Rickman CR.

 ;) Two thumbs Up on your Rickman project John.
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Offline Don R

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Re: Moto Martin GSX 1260 -82
« Reply #28 on: November 11, 2024, 12:50:30 PM »
  Those bikes are just too cool.
  I've got an Egli framed 750, unfortunately it isn't that Egli. This one is named Steve, lives an hour away from me.  L0L.  It is stretched, lowered and raked, you can take the motor apart in the frame like a 750A and a stock K tank fits it. He had a really good fabricator.
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Online scottly

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Re: Moto Martin GSX 1260 -82
« Reply #29 on: November 11, 2024, 03:33:08 PM »
Quote from: BenelliSEI on November 11, 2024, 06:37:29 AM
Quote from: DME on November 09, 2024, 11:07:31 AM
As far as I know the frame is made of brazed (not welded) thinwalled chromemoly tubing and finished in nickel plating  :)

Just like the Rickman CR.
The Rickman and Seeley frames were made from Reynolds 531 tubing, which is not the same alloy as chrome-moly. 531 has 5 parts manganese, 3 parts carbon, and 1 part molybdenum. It is always brazed, as the temperatures required for welding weaken the material. Chrome-moly can be welded.
The Seeley frame is also wide, but not as wide as your Martin!
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Offline DME

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Re: Moto Martin GSX 1260 -82
« Reply #30 on: November 11, 2024, 11:26:48 PM »
A couple of pics of a Martin GSX frame that has had the plating removed.
The slightly yellow brazing can be seen all over, and it contrasts a lot to the tig welded repair of the pipe for the fairingstay in the second pic.

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Offline grcamna2

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Re: Moto Martin GSX 1260 -82
« Reply #31 on: November 11, 2024, 11:50:49 PM »
I like the look of that braze and it looks something better than torch-applied.
How do they apply the brazing to the Moto Martin frame tubing ?
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75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline DME

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Re: Moto Martin GSX 1260 -82
« Reply #32 on: November 12, 2024, 03:10:24 AM »
I'm not aware of any other method than oxy-acetylene brazing, but I'm no expert...
I would say that back in 1982 it was all hand-produced with oxy-acetylene but again, I'm no expert...

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Offline simon#42

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Re: Moto Martin GSX 1260 -82
« Reply #33 on: November 12, 2024, 05:31:01 AM »
You can braze with an electric arc , but you are right back then frames were made using oxy acetylene
And so they should !
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Offline MauiK3

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Re: Moto Martin GSX 1260 -82
« Reply #34 on: November 13, 2024, 06:32:09 AM »
I have read but don't know from experience that the MAP gas kits can braze. I'm going to try it out and see.
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Offline DME

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Re: Moto Martin GSX 1260 -82
« Reply #35 on: November 24, 2024, 05:33:17 AM »
This thing has now had a thorough clean-up, very satisfying feeling to remove dirt and grime that has been sitting for almost 25 years  :)
No obvious unexpected problems found underneath the dirt, and a quick hookup to a battery confirmed a working starter, lights and a healthy spark on all four plugs  :D
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Online BenelliSEI

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Re: Moto Martin GSX 1260 -82
« Reply #36 on: November 24, 2024, 06:01:22 AM »
What a beast!
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Offline MauiK3

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Re: Moto Martin GSX 1260 -82
« Reply #37 on: November 24, 2024, 06:49:15 AM »
I wonder what it weighs, looks massive.
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Offline grcamna2

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Re: Moto Martin GSX 1260 -82
« Reply #38 on: November 24, 2024, 11:05:19 AM »
Quote from: DME on November 24, 2024, 05:33:17 AM
This thing has now had a thorough clean-up, very satisfying feeling to remove dirt and grime that has been sitting for almost 25 years  :)
No obvious unexpected problems found underneath the dirt, and a quick hookup to a battery confirmed a working starter, lights and a healthy spark on all four plugs  :D

How is the rear shock absorber ?
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75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline DME

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Re: Moto Martin GSX 1260 -82
« Reply #39 on: November 24, 2024, 11:32:52 PM »
Quote from: BenelliSEI on November 24, 2024, 06:01:22 AM
What a beast!

Yes, it´s quite the machine  :D
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Offline DME

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Re: Moto Martin GSX 1260 -82
« Reply #40 on: November 24, 2024, 11:41:50 PM »
Quote from: MauiK3 on November 24, 2024, 06:49:15 AM
I wonder what it weighs, looks massive.

Well, ask and you shall recieve...

With no fuel and no battery, but WITH engine oil and brake fluid (and lots of dirt and burnout rubber... 8) ) the scale stops at 206.2 kilos (or 454.6 lbs).

« Last Edit: November 25, 2024, 01:22:43 AM by DME »
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Offline DME

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Re: Moto Martin GSX 1260 -82
« Reply #41 on: November 24, 2024, 11:46:17 PM »
Quote from: grcamna2 on November 24, 2024, 11:05:19 AM
How is the rear shock absorber ?

The Öhlins rear shock is fine, will of course be serviced before use and as the unit is fully rebuildable it should not cause any problems  :)
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