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British Bikes / Re: T140 rear wheel, binding when tighten spindle
« Last post by Rex on November 14, 2024, 05:57:31 PM »
The hub and speedo drive both have marks which suggest that the speedo drive has spun at some point.
Do you have the missing parts to the speedo drive?
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British Bikes / Re: T140 rear wheel, binding when tighten spindle
« Last post by L.A.B. on November 14, 2024, 10:36:09 AM »
One note about the 37-7021 washer is that it was not fitted to the very early rear disc model as I believe the raised section was originally part of the caliper bracket (which is missing from your picture) so what year T140 is it?

The chain adjuster also looks like the wrong type and the end plate is missing. If the LH chain adjuster has a spacer attached to it then it's the wrong type.
https://www.thebonnevilleshop.com/product/triumph-650-t120-750-t140-bonneville-tr7-tiger-wheel-adjuster-set-pn-37-3742-1/

https://www.feked.com/triumph-t140-chain-adjuster-plate-83-3082.html
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British Bikes / Re: T140 rear wheel, binding when tighten spindle
« Last post by L.A.B. on November 14, 2024, 09:19:11 AM »
Like this.
https://www.thunderbirdspares.com/speedo-drive-norton--bsa-bg5330171-1512-ratio-uk-made-1116-hole-1057-p.asp
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British Bikes / Re: T140 rear wheel, binding when tighten spindle
« Last post by L.A.B. on November 14, 2024, 08:52:15 AM »
The fact that the speedo drive face should be flat.
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British Bikes / Re: T140 rear wheel, binding when tighten spindle
« Last post by Eedward on November 14, 2024, 08:50:44 AM »
Thanks for that, very helpful.
What keeps the face away from the hub to stop it wearing, as it has done on mine ?
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British Bikes / Re: T140 rear wheel, binding when tighten spindle
« Last post by L.A.B. on November 14, 2024, 08:44:46 AM »
Not only is the face of the speedo drive seriously distorted (it should be flat) but the 37-7021 washer (below) is also missing.





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British Bikes / Re: T140 rear wheel, binding when tighten spindle
« Last post by Eedward on November 14, 2024, 08:24:55 AM »
Hi again.

I had yet another head scratch while looking at it, as spacer (as mentioned by L.A.B.) is there, though there is nothing to stop the spedo drive from being pinched/bind against the wheel as there seems to be a spacer or something missing. In one of the photos, if you can see, there is a space between the wheel spacer and spedo drive and I wondered if there needed to be something there so they didn't touch when the spindle nut is tightened, and therefore binding on the wheel hub ? If so, I can't see anything in the manual to show this.

I have attached some photos to try and show what I mean.
Further thoughts would be much appreciated.

Thanks,
Edward
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British Bikes / Re: T140 rear wheel, binding when tighten spindle
« Last post by Rex on November 13, 2024, 04:34:45 PM »
I would suggest if that spacer was missing it would be noticeable when you tightened the spindle, as the speedo drive would start to deform before the nut became tight.
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British Bikes / Re: T140 rear wheel, binding when tighten spindle
« Last post by Eedward on November 13, 2024, 10:39:46 AM »
Thanks for the replies chaps, much appreciated.

L.A.B. I will have a look at the spacer you mentioned, that sounds like what is missing ! Thank you.
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British Bikes / Re: T140 rear wheel, binding when tighten spindle
« Last post by L.A.B. on November 08, 2024, 11:51:30 AM »
The early type with the Smiths speedo drive can bind on the wheel.
I'm assuming it's a spoked wheel.

Make sure you have the correct RH spacer.
 https://www.feked.com/triumph-rear-hub-right-hand-wheel-bearing-spacer-t140-tr7-models-circa-1976-79.html
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