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#832133 12/04/20 12:18 am
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I am currently doing just this, building a complete bike from parts after being given a 1969 T150T frame. Its quite feasible given that the lower mounting can be used (the rod and spacers are just longer), the rear engine plates need to be slightly adjusted by reworking the holes for the engine as well as grinding a bit off the footrests so they clear the bolts. The front mounting I modified to be similar to the 1970 650 by making two triangular plates after drilling and welding two tubes into the front frame tube. I haven't done the top mount as yet, but that should be a couple of simple brackets or tubes. Importantly, the chain line does not need to be moved as using the standard mount location it all lines up, not surprising as the frames are generally similar.
I'm sure this has all been done before, I just couldn't find much about it. A future job will be to fit an export 650 tank. the Trident has detachable mounts (F9380) at the front, however I don't have those to see if the tank will fit. I think the mounts are 5 1/2" across the front and 18 1/2" front to rear, can anyone confirm? It anyone needs pics, please PM as posting pics on here isn't a thing for me.


1968 T150/TR6R
1970 TR6C
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I believe the triple's engine sprocket is 0.1" inboard of the twin measured from the centre line.

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Hi,

Originally Posted by tiger_cub
A future job will be to fit an export 650 tank.
The T150 US-market tank (including '69 'beauty kit' and '70 North American Variant) is the dry-frame TR6R tank, just without the latter's coil cutouts and with a longer rear mounting bracket to reach the T150 frame lug.

Originally Posted by tiger_cub
Trident has detachable mounts (F9380) at the front,
These only work to mount the front of the breadbin tank, the corresponding frames had a separate welded-on bracket to mount the oil cooler.

All US-market tanks from the original 'beauty kit' onwards came with a combination bracket (F12024) that bolts to the frame in place of the F9380's, that bracket mounts both the oil cooler and the front of the tank. '71-on, Triumph created a similar bracket (F14438) for the breadbin tank because the two tanks' front stud spacing and relationship to the rear mounting are completely different. With the two oil cooler/tank mounting brackets, frames didn't have to be differentiated 'UK & General Export' or 'US' by the presence or absence of a welded-on oil cooler bracket

Hth.

Regards,

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Thanks to all for the info above. I should be able to locate the tank bracket F12024 locally, cut the oil cooler part off, with the export tank, even if I have to add on a longer rear mounting. Regarding the chain alignment, that offset mentioned looks correct, but by swapping the sides of the rear axle inner nuts so the thin one is on the left, it all works. Chainguard matches up too.


1968 T150/TR6R
1970 TR6C
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I could only find a UK spec tank bracket (locally - free). Having looked at pics of both online, it appears that the US tank version is narrower and lower, although its hard to see if the front-rear distance is the same. I may be able to modify it, although I don't have a tank as yet to trial fit. Can anyone confirm the relevant dimensions?


1968 T150/TR6R
1970 TR6C
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You mean this one? Distance between tank mounting holes looks to be 5". Not sure what else would be relevant since you don't need cooler mount. Its actually 3 brackets welded together. [Linked Image]

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Thanks Dick, exactly what I needed. It looks like the tank mount hole is about 1" rear of the frame bolts? The UK version is straight across with 5 1/2" centres so it will need to be modified. I may just have to make the brackets. I am also going to make templates of the engine plates if anyone is interested I will scan them.


1968 T150/TR6R
1970 TR6C
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Hi,
Originally Posted by tiger_cub
looks like the tank mount hole is about 1" rear of the frame bolts?
Correct, exactly 1". The centre is also 1-7/8" from the face of the frame lug on the corresponding side.

Hth.

Regards,

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The bike is almost finished! Fired first kick today, started third. Just a test run, still a few tweaks to do, slight hesitation on opening throttle, but hopefully roadworthy test in next few weeks. Looks great, Trophy style with high level 2:1 pipes, small tank & light etc.


1968 T150/TR6R
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Originally Posted by tiger_cub
The bike is almost finished! Fired first kick today, started third. Just a test run, still a few tweaks to do, slight hesitation on opening throttle, but hopefully roadworthy test in next few weeks. Looks great, Trophy style with high level 2:1 pipes, small tank & light etc.
Pictures expected!

SR

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Originally Posted by Stein Roger
Pictures expected!
SR

My sentiments exactly thumbsup


Jon W.


1957 6T Thunderbird 650
1968 T100R Daytona 500
1971 TR6R Tiger 650
1970 BSA A65F 650
1955 Tiger 100 - Project
1971 BSA A65 650 - Project
1972 Norton Commando 750 "Combat"


"Every time I listen to AC/DC, so do my neighbors"

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Pictures on here have never been my strong point!!


1968 T150/TR6R
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Oh oh!! small issue. I had it running and rode it a few times in the back lane. I moved it to neutral but now the gear lever won't shift it at all. It moves but its solid trying to pull it up. It worked through first second and third, although it was not the best of changes, felt very stiff and got neutral each time. My first thought is indexing, but it was spot on when I first did it and I put it back to how it was when I fixed the leak. If thats the issue and I maybe didn't do it correctly no biggie, but what else could it be?


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4 or 5 speed? What shape is the camplate plunger (if you can remember), has the plunger holder got the long straight hex?

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Its a 4 speed. The plunger housing is not the long hex one. The plunger is an older one I think, just a conical top. I will drain the oil and remove it, I have a spare one somewhere so will see if that helps.


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Take a look at the spring as well, there were several different ones, particularly a "strong" one 57-1604, a whopping 3 1/2" long compared with 57-0373 (standard for '68) @ 2 1/2" and 57-3661 used in '69 and '70 @ 2 1/4" long.

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Plunger looks OK. I removed the outer gearbox cover and the camplate (inside the gearbox) is down as far as it can go. Looks to me like indexing. I will fix that tomorrow.


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You can check indexing easily enough if you can find the neutral between 2nd and 3rd, the middle tooth of the camplate operating quadrant should line up with the centre line of the gearchange spindle. It's how I set up 4 and 5 speed boxes anyway, at least, the non-leafspring ones. And for everyone else out there, yes, I do know about the other methods, it just suits me!

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Thats exactly how I set it up, I must have messed it up later


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1970 TR6C
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Gearbox back together and feels different already getting it back to neutral. Not started as still a few bits to bolt back on. Plunger spring is a 2 1/2".


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1970 TR6C
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Got it running again and gearbox changes are nice. I have an issue with a misfire on acceleration. I did notice one of the points arcing so I an going to swap that condenser with a spare one I have. (They were both new but you never know...)


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My condenser diagnosis was spot on! Replaced one of the new ones with a 40 year old one and it now runs really well. Roadworthy inspection hopefully next week, better put the brake pedal on now....


1968 T150/TR6R
1970 TR6C

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