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Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.

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Old 01-08-2013, 09:17 PM   #1 (permalink)
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Main Motorcycle: 1970 Triumph T120R
 
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T120 rear brake setup

I have acquired a basket case T120R chopper project and am in the process of putting it together. This is my first bike.

I would like to know what the rear brake foot lever is supposed to look like. From what I gather the bike now has a brake lever from an oil in frame bike. My frame is not OIF. I have some new rear motor plates that fit the unit 650 from 63 to 70, but have a different type of brake lever mount. The rear motor plates on the bike were homemade.

I have found a brake lever and additional bracket that is supposed to work but am unsure how it all mounts.

Does someone have a picture of a stock rear brake set up?

Here is a pic of the new motor plate. My existing plate does not have the welded boss for the brake pivot. Also the mounting hole for the frame does not line up. Anybody know why?

Thanks
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T120 rear brake setup-lh-engine-plate.jpg  
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Old 01-08-2013, 09:48 PM   #2 (permalink)
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Quote:
Anybody know why?
Looks like a home-made attempt and not a very good one.

Only the early OIF bikes had a left side brake pedal with a right side shift.

Anything is possible depending on what the builder had in mind.

Personally- would ask this question over on the Jockey Journal:
http://www.jockeyjournal.com/forum/forumdisplay.php?f=2
No offense to our members here but those guys are more into chopper / bobbers/ custom.
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Old 01-08-2013, 10:21 PM   #3 (permalink)
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Can we assume that you have a drum brake? If so, is it a conical hub (71 and up) or the earlier flat drum? Both should have the backing plate on the left side.

My '71 (first OIF) has the brake rod actuating lever on the outside of the frame (the one that the brake rod attaches to) and is made as part of the brake pedal lever. My '69 has the lever on the inside, in other words you push the brake pedal lever through the hole in the mount and then attach the actuating lever with a nut and this is what the brake rod attaches to.

Which one you could best use will probably depend on which lever you have on the backing plate .

I can give you a picture of the set up on my '71 and my '69 if that would be helpful.

Art.
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Old 01-09-2013, 02:24 AM   #4 (permalink)
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Thanks guys.

The plate in the original picture is the new part, not sure if it's the part or the bike that's not fitting right.

The brake lever I have now is on the outside of the mount. Not sure which rear brake I have but is probably the later since the brake lever on the brake itself lines up fairly well with the brake lever on the bike which is on the outside.

A picture of both styles of brake lever would be great. I'm trying to determine exactly what I have as well. It appears that the frame is from the mid sixties, that is from comparing the tabs on it to other frames. The engine numbers show a 71.

Here are some pics of what's on the bike now.
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T120 rear brake setup-imag0561.jpg   T120 rear brake setup-imag0563.jpg  
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Old 01-09-2013, 05:04 AM   #5 (permalink)
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Hi,this is a photo of a standard 1964/66 rear brake.Hope it'll help?Cheers!
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Old 01-09-2013, 06:47 AM   #6 (permalink)
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Hi Car,

I am not familiar with the lever you have on your backing plate. My guess is that it is something fitted by who ever modified the bike and bent to fit. But, I don't know for sure that it is not a stock piece from some year Triumph.

The lever on the backing plate of my '69 looks like Moto6T's '64-66' example, a flat lever.

If you want to use the new plate that you show in your first post and the new levers that you mention that you obtained, you will need to find a flat backing plate lever to align with the "inside" lever.

If you have the engine plate that works with your "outside" brake pedal shown in your second post why not continue using it?

Something that I did notice about the "new" plate shown in your first post with the welded boss, it does not seem to have the third bolt hole for the stock frame tube that heads up to the shock mount. It appears to be cut off and the plate rounded on the rear side. Or is this a home made plate?

At any rate, the hole in that plate (in your first post) that is above and forward of the boss for the brake pedal would normally be the hole for the swing arm attachment, something you would not use if this is a hard tail. With out the need for a swing arm mount and no mount to a frame rail for the third bolt I guess the only job for this plate is to support the brake pedal. It would remain to be seen if there will be sufficient support for the engine with out the rear mounting plates.

Good luck with your build, Art.
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Old 01-09-2013, 12:55 PM   #7 (permalink)
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It is a triumph rear brake arm from the earlier models.You could rig up something like in these photo's of the 'Thruxton' T120?.....
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Old 01-09-2013, 01:36 PM   #8 (permalink)
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Thanks for the pics and information. I will run the engine played since the foot pegs also mount to them The existing plates are homemade and are bent. The foot pegs have been welded on as well. I will see if there is clearance to run the inside style brake lever and arm.

Did the motors change in 71 along with the frame? I'll just modify the new plates to fit the motor.

I'll keep it updated as to how it all fits together.
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Old 01-09-2013, 02:55 PM   #9 (permalink)
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Only the frame changed, not the engine. But, that means the brake hardware also changed somewhat.
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Old 01-15-2013, 04:07 PM   #10 (permalink)
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Does anyone have the part number for the lever and spring that mounts on the rear brake on a 1970 T120R? Should it look like the one pictured above for the 64 -66.

The rear motor plates were not fitting due to an incorrect front mount as well. A new one is on order. The motor is missing the spacers on the lower mount. Once the correct parts are installed everything should fit well.
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