1983 Triumph T140W 750 TSS; 8 valves & electric start!

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Re: 1983 Triumph T140W 750 TSS; 8 valves & electric start! - GrandPaul

Hello Paul,

This thread has been particularly useful for the rebuild of my TSS. Now that your TSS is 99% original, could you post a photo. How is it running?

SD
 
Re: 1983 Triumph T140W 750 TSS; 8 valves & electric start! - GrandPaul

Mike,

Missed out on the header pipes and mufflers in USA on eBay, however found a pair of mufflers in very good near new condition at classic all parts in Sydney. The new owner was having a clean out and found them. New mufflers now fitted and looking good.

Went for another ride yesterday and the bike is purring. Knocked the socks off the guys at the local British Classic Motorcycle Owners Club meeting yesterday. :y2:
 
Re: 1983 Triumph T140W 750 TSS; 8 valves & electric start! - GrandPaul

Mike,

Missed out on the header pipes and mufflers in USA on eBay, however found a pair of mufflers in very good near new condition at classic all parts in Sydney. The new owner was having a clean out and found them. New mufflers now fitted and looking good.

I am glad you found them. Very good. TUP

Went for another ride yesterday and the bike is purring. Knocked the socks off the guys at the local British Classic Motorcycle Owners Club meeting yesterday. :y2:

I bet it did!!!!
 
Re: 1983 Triumph T140W 750 TSS; 8 valves & electric start! - GrandPaul

Paul, ... now that your TSS is 99% original, could you post a photo. How is it running?


I haven't gotten the pipes yet, and it'll take me a week or so to swap them out once I get them. The mufflers that were on it are very close to original looking, so it won't look much different from the first photos i posted.

The bike runs great, and everything works as it should; yes, even the OEM Bing CV carbs! My biggest problem is any one of my bikes getting to be ridden enough from month to month so that the carbs don't start to get varnish/sediment, tires don't get low, batteries don't go flat, etc.

These days, i've been keeping only 3 or 4 of my bikes registered, insured and ready to ride. it's just too much to go back to the days when i would ride 20+ bikes for a few miles each, at least once a month.
 
Re: 1983 Triumph T140W 750 TSS; 8 valves & electric start! - GrandPaul

Mike,

Missed out on the header pipes and mufflers in USA on eBay, however found a pair of mufflers in very good near new condition at classic all parts in Sydney. The new owner was having a clean out and found them. New mufflers now fitted and looking good.

Went for another ride yesterday and the bike is purring. Knocked the socks off the guys at the local British Classic Motorcycle Owners Club meeting yesterday. :y2:


BARGAIN?

The ones on your bike look mint, are you collecting stuff for a second TSS by any chance?


Got an update on my bike from the shipping company today, now expected in Brisbane on 29th May and should be ready to pick up about a week later.......

Trying not to think about it too much:y9:
 
Re: 1983 Triumph T140W 750 TSS; 8 valves & electric start! - GrandPaul

BARGAIN?

The ones on your bike look mint, are you collecting stuff for a second TSS by any chance?


Got an update on my bike from the shipping company today, now expected in Brisbane on 29th May and should be ready to pick up about a week later.......

Trying not to think about it too much:y9:

Tempting to purchase another, however with teenage kids requiring education and transport I have to settle for collecting parts to keep this one going forever. The chrome on the mufflers on my bike was quite pitted. No such problems with the new ones. Really is an enjoyable machine to ride. Puts a huge smile on my dial without breaking the speed limit. I use any excuse to go for a spin. Looking into making the throttle action a little lighter which will make longer rides more enjoyable.

Only 25 more sleeps and you will have yours ! :y10:
 
Re: 1983 Triumph T140W 750 TSS; 8 valves & electric start! - GrandPaul

ThrottleSpring.jpg


Heavy throttle sorted.

Can not take the credit for this piece of genius. That must go to Ben Crossley, the man who designed much of the 8 valve engine at the Meriden factory. I was reading an article of his, where he was so impressed with the TSS that he purchased one. The heavy throttle detracted from the pleasure of the machine so he used a pipe bending spring which was anchored at the left hand end of the handle bars and acted on the throttle. I had a 12mm diameter light weight coil extension spring about 100mm long in the shed, so anchored it to a hole I drilled in the RH handle bar. It works a treat ! The throttle action is as light as the Street Triple. :y2:
 
Re: 1983 Triumph T140W 750 TSS; 8 valves & electric start! - GrandPaul

So simple and very clever!

Any particular reason why the throttle action is so heavy?
 
Re: 1983 Triumph T140W 750 TSS; 8 valves & electric start! - GrandPaul

So simple and very clever!

Any particular reason why the throttle action is so heavy?

Hi Mike,

Your bike looks great. All present and correct. Probably never had a spanner laid on it except for the first service. Nice find !

With the heavy throttle, I'm guessing Bing supplied the carbs as a bolt on unit and little attention was paid to matching the twist grip to them. With the butterfly throttle valves on the Bings, they require a reasonably strong return spring as the air rushing past them has the tendancy to hold them open. With the Amals, this still occurs with the slide, however gravity assists in closing them and a softer spring can be used.

Bing1.jpg


The picture shows the spring and spring mount as a complete unit.

My thoughts only. :y9:

SD
 
Re: 1983 Triumph T140W 750 TSS; 8 valves & electric start! - GrandPaul


"I'm
guessing Bing supplied the carbs as a bolt on unit and little attention was paid
to matching the twist grip to them".


I reckon you are on the money, Iread somewhere the Bings were only fitted for the US market bikes ( more for thosetree hugging Californians) with Amals in the UK and possibly some other marketsin order to meet ever tightening emission laws. So triumph would have grabbedwhatever they could get from whoever would give them credit!!

Haveyou tried other springs?



Apologiesto any Californians (especially Triumph owning ones)
 
Re: 1983 Triumph T140W 750 TSS; 8 valves & electric start! - GrandPaul




I reckon you are on the money, Iread somewhere the Bings were only fitted for the US market bikes ( more for thosetree hugging Californians) with Amals in the UK and possibly some other marketsin order to meet ever tightening emission laws. So triumph would have grabbedwhatever they could get from whoever would give them credit!!

Haveyou tried other springs?



Apologiesto any Californians (especially Triumph owning ones)

Hi Mike,

Have not tried different springs as the twist grip spring does pre tension the throttle cables and I wanted to ensure the throttle butterflies would shut and stay shut at idle. Lighter springs without the twist grip spring would also reduce the weight of the action. I did try a small spacer chain link to extend the original springs prior to fitting the twist grip spring, with some improvement experienced, but not enough. The advantage of the twist grip spring is that at a steady throttle setting when cruising there is nearly no pull on the throttle. That was the result I was chasing. Really takes the load off the right hand on extended rides.

Hope this helps.

SD
 
Re: 1983 Triumph T140W 750 TSS; 8 valves & electric start! - GrandPaul

First service completed. Just clocked up 300 miles so thought I had better check things over plus a small "warranty" job. Have been using Sikolene semi synthetic 20W50 which has very good penetrating properties which I required to ensure the rocker gear was getting sufficient lubrication. Appears that it has done the job and all is well in the rocker lubrication area. One down side was that a small oil leak had developed at the bottom of the timing case. This was caused by one of the oil gallary dowels had picked up in the timing cover gallery and was not allowing the timing cover to compress the gasket adequately. This was the "warranty" job and an easy fix.

The head nuts torqued down another quarter turn along with the barrel base bolts and valve clearances needed adjusting as a result. Fixed the slight flat spot I had just off idle. Discovered the left hand carburettor needle was set at a notch higher (needle lower) than the right hand needle. Both needles are now at the same setting and all is well.

Now all that remains is to enjoy the ride. :y54:
 
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