T160 carb springs n' choke requirement

Discussion in 'Triumph (Classic)' started by auldblue, Dec 6, 2017.

  1. auldblue

    auldblue VIP MEMBER

    Joined:
    Nov 20, 2012
    I am tarting up the 160 carbs and was intending to remove the chokes and blank the carb tops, renew the springs and replace the rubbers . Any ideas for improvement ? The choke was never used and the twist grip action was fine.
     
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  2. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Jimmy, my T160 never needed chokes, and I was very glad to ditch all of that detritus!

    I set mine up T150 style, meaning (if I recall correctly) richer needles, needle jets, and slide cutaways. But I also fitted the T150 ‘date box’ air filter (initially at least, I fitted velocity stacks later).

    I’d certainly consider having them bored and sleeved whilst I had them off and stripped.
     
  3. Onder

    Onder

    Joined:
    May 11, 2010
    If the bike will start without the chokes you will be well served to remove them and plug the top hole. I think Burlen offers
    a plug, I just used a little blob of RTV in the female adjuster socket.
    If you have a failure with the cable the chokes will drop home and this will happen only a long way from home.
    I know of what I speak!
    Besides there seems to be no real way of establishing a sensible routing of the cable.
     
  4. Fast Eddie

    Fast Eddie VIP MEMBER

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    Oct 4, 2013
    Petrol will degrade RTV.

    I used to make plugs by filling the threaded adjusters with Araldite. Doesn’t seem worth the hassle now though because, as you say, Burlen sell very neat purpose made blanks for the choke cable holes.
     
  5. auldblue

    auldblue VIP MEMBER

    Joined:
    Nov 20, 2012
    image.jpeg image.jpeg

    Cheers men , took the carbs appart, they have been sleeved , all jets standard , old style floats but ally float needles. The float bowls are somewhat distorted, I'm going to try and flat them out a bit and put in stay up floats, chuck out the washers and small internal springs and replace with new from LPW T160 lightened springs.

    Is it worth replacing the needles and needle jets? Ive got blanking plugs but there are a few bits still to arrive including a new float bowl

    Stuck the valves in after grinding , everything seems good but looking at that photo an aqua blast seems in order.

    I've not looked into slides etc Nigel but I'm going to do a bit of research, there's no rush anyway although I would like back together fit for purpose .
     
    Last edited: Dec 8, 2017
  6. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    IF my memory serves, early T150s had a no 3 slide, later ones an T160s and a 3.5. Either may be fine, you won't know until trying it out.

    I thought the T160 had smaller needle jets, but I think this was wrong, they both have 106.

    The biggie is the needles themselves. T160s had a leaner 'emissions' needle. I would definitely therefore change the needles to 'normal' T150 needles.

    I would fit new needle jets as well as a matter of course. Needles and needle jets do wear as the needles rattle around a lot.

    Nice to see you using some nice pipe grips for those delicate operations !!
     
  7. trident sam

    trident sam

    Joined:
    Oct 23, 2012
    T160s were fitted with no 4 slides.
    If the carbs have been bored and sleeved I'm pretty sure that new slides won't fit properly anyway.
    Fit new needle jets and needles, but stay with the 5 ring T160 needles and try them on the weakest setting (top notch) first, this often gets rid of the bogging down that triples can suffer from just off idle.
    sam
     
  8. Fast Eddie

    Fast Eddie VIP MEMBER

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    Oct 4, 2013
    Wow Sam, T160 needles on the weakest setting, that sounds pretty weak!
     
  9. trident sam

    trident sam

    Joined:
    Oct 23, 2012
    yes, I know it sounds all wrong , but that's exactly how my bikes are now and any bogging down has gone and been replaced by clean acceleration. The 2x 990cc bikes are obviously running bigger main jets , but the 750 is just as quoted above. Running them weaker made a huge difference. It might not work for Jimmy's bike but it's worth a shot.
    It might be the fuel we get these days is just not as good as in the past.
    sam
     
  10. Fast Eddie

    Fast Eddie VIP MEMBER

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    Oct 4, 2013
    Fairy nuff Sam, ain’t arguing with that.

    In fact I do agree with the fuel bit, I’ve long had a hunch that modern fuel tends to make bikes run richer than they once did.
     
  11. auldblue

    auldblue VIP MEMBER

    Joined:
    Nov 20, 2012
    Cheers guys, Sam Unfortunately is correct the slides do not fit the best and as you can see in the photo they are number 4 throttle valves but the cutaway is between 5.5 and six mill?

    I did order new needle jets and t160 5 notch needles, LPW, I also ordered a new number 4 t/v just for comparison . I'm going to run with SAMs settings and see how things pan out.
    With the size of those cutaways that would lean it a fair bit? The needles in it were 3 notch can't read but will try later and edit. Thanks again Gents, I'm a we bit further forward. image.jpeg
     
  12. auldblue

    auldblue VIP MEMBER

    Joined:
    Nov 20, 2012
    After a read at the Amal book the slides are what they should be. Going to get the new jets in and dress up the float bowls etc. Cheers for the input guys.
     

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