Carbs?

Recently sold the speed triple s and bought myself a cafe racer with a T 140V motor I think the carbs have seen better days.
Any ideas of the best way to go, new mk1 Amals, Mikunis etc or rebuild the originals?
Here she is;

 

£250 for a pair of new mk1s won't the rebuild cost near that and new ones be made from better materials?

 

Ok DD will look into it don't mind spending the money if it helps it be reliable

 

We used to put mk2 Amels on them as an upgrade,but a rebuild should do it

 

If the throttle slide has worn the body of the carbs excessively and is now a loose fit, then I would replace the carbs as it will never run properly like that.
However, if the slides/carb bodies are in fairly good condition then just do a rebuild. The main bugbear will most likely be a worn carb body which renders it scrap (though I have heard of them being re-sleeved).

 

I'm with Goolie, that's what I would be looking at, body and slides. What's making yer think carbs not right? That's too nice a Triton (wideline me thinks?) to have poor carbs on?. Are you sure carbs have been set up properly? I think I have amal set up somewhere, I'm just doing 75 T140V Cafe racer. Also with no air filters, jet sizes need to be different from standard. Can you talk to guy that built it for more info/history?

 

Dribble...

Not helpful but I just wanted to add my thoughts!

 

I found these links quite a good guide to cleaning the carbs. Part 1 and Part 2

 

Nice bike ! Amal still do the carbs and all the parts.
http://amalcarb.co.uk/carbspec/carburettor/spares/id/6335/

 

Thanks for all the replies
Yeah wideline Norton frame with roadholder forks and borrani rims tls front brake so nice spec.
She's got a boyer ignition (timing is right) Mk 1 Amals with 210 mains 190 is stock.
I think she was built in the 80s but the last owners has changed some bits ie the exhaust was twin pipes and is now the 2 into 1 with the "gary" type silencer
I've only had her since Sunday night and fettle time has been limited but started her up ran up the road miss firing badly (trait of too much fuel I think) so will be changing out the fuel (been sitting 4 years) and cleaning the carbs out and trying again.
She's a keeper (always wanted one) so swapping out the 40 year old carbs is something I might just do and a mate had Mikunis on a T 140 a few years back and it ran really well but at £500 a pop I'll be getting Amals

 

With those carbs would expect jets struggling with old petrol, and float needles too. I don't think anyone building that bike to such a good spec would skimp on carbs. Had a few Tritons, one a pre-unit jobby, show winner at a 1% club show. Sort the cleaning out, electrosonically if needed before buying owt, but doubt yer need me to say that

 

Point taken RR will get on with a good clean out instead of the lazy bolt some new ones on method

 

High speed run now there's an idea

 

If it had stood for ages the fuel alone could be the cause. If that, and a good run with redex or similar doesnt help, and if you can afford it I would go with new Amals, so many variables with old carbs it can cost much more than a new set, changing this and that. I agree Mikunis are great and work really well but they are so expensive

 

Stick a pair of SUs on it but don't forget the oil in the damper chambers

 

Update;
new fuel (super) new plugs (champion sport) cleaned the carbs out up the road for a test still missing badly so back home changed the mains one to 190 one to 180 (couldn't find a pair), up the road again missing badly so back home. Several cigarettes and cups tea later ; this time carbs off slides apart change needle clips from position 3 to position 1 (where they should have been) put the 210 mains back in, up the road no missing she's sorted now got to stop the fecking clutch from slipping
Oh and ffs how did it take 6 hours

 

6hrs ?
Too much tea and ciggys
That's why

 

At least it's easier to work on than modern bikes - try getting into the carbs of a Trident 900 or similar!

Clutch slip? Usual suspects I guess ... cable adjustment or the four (if memory serves) spring adjusters on the clutch plate may need a slight tweak. Cork inserts on the plates may be perished. Last time I played around with a clutch was in 1967/8 on a 1960 Speed Twin so the previous suggestions could be total bollox! SIGH!!

 

Yeah well I love custom builds T140V cases with a four speed box putting the gear selector on the right (the correct side).
Took the clutch apart degreased it and generally cleaned it up looks ok and within service limits apart from the push rod it's not well bent and burred to boll@cks



New rod and gaskets ordered

 

Yeah, I found gettin' clutch basket to spin truly and hence pressure plate to apply pressure truly, interesting. Found well used brass nuts can get ground off a bit by springs, and not necessarily all showing the same amount of thread to get even pressure. Triumph tool bit awkward but good old screwdriver ground out in middle accordingly works well.