Triumphrat

eddyfiola

My 'new' throttle cable 2 into 1 plastic unit failed while riding in the city recently and I ended up limping home on one cylinder! Very annoying. I have never really been comfortable with the random routing and haphazard 2 into 1 unit that makes up the throttle cable set, from the twist grip to the carbs. I find there is very little room for the cables since all the electrics run along the same route, and once the tightly fit tank sits on top of the whole lot, the throttle cables are squeezed and do not sit as they naturally would and as a result, become bent and pushed into acute angles that creates frictions.

Does anyone have any tips as to avoid these problems, or are there any good modifications available out there? I would, if I had the know how, like to make a unit concisting of metal, hollow tubing with cables running through from the carb to the twist grip and avoid all the bends and 'give' one gets with the traditional cables. A kind of self plumbed and routed unit. anyone tried this?

Sorry for the long post on such a simple subject but it is a real issue on my bike especially with the failure I had, and certainly when comparing to Japanese setups.

Look forward to the replies.

Ed.

rambo

I use twin cables and find the best method is to have the tank fitted and just push the cables up beside the tank.No crush,or anything to catch on.biggest advantage with twin cables is that if one breaks,you can go home on a Triumph single cylinder.Petrol wash is not so nice though

Caulky

Run all cables under the frame.
None of them should be pinched by the tank.
The electrical cables can be taped or fixed by cable ties.
Also the clutch cable [lightly].
My throttle cable/s are loose, to avoid sharp bends or restictions.
Be careful when fitting the fuel tank.
Unable to send pictures because Photobucket has gone ****up

triumpt120rv

Along with proper routing advice stated above, use the "better" junction box by amal. Not sure which one you used but I know there are some pretty poor quality ones being sold. Here's a link to amal's:

http://www.amalcarb.co.uk/ProductDet...lType=1&id=163

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eddyfiola

I just read my post again and it gave the impression that I sit the tank on top of all the cables - I do not, they sit under the frame. The problem is the lack of space between the tank and frame at the sides.

I am using the amal connector but the nipple at the end of the cable pulled through the fitting and lodged in the side of the unit! A metal copy would be the way to go.

Anyway, thanks for the posts. BTW, has anyone changed to new throttle slides because of the old ones wearing out, and seeing a big change? Mine appear very worn and I fear the carb is running a little lean in the lower range especially when cold - specifically 3000rpm. I have changed all the jets to standard some time ago and the slides are the remaining items that are old. What effect do worn slides have?

Thanks again.

triumpt120rv

http://www.ebay.com/itm/244-104-TWIN...item3f1dc148dd

Worn slides will not allow you to tune the carb properly.

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mike1976

hello, on my 76 bonne i run the dual cables with no problem, i will say i do worry about leaving enough slack in them during adjustment. because it can change during install. for me i just tried to route them with no sharp bends. let them lay where they want to. i would consider individual cables though, because i had a hard time finding a correct length spare upper. i guess it's either make it myself or pay for custom made. Mike.

rambo

Worn slides will let air by.I am about to replace my Amals after about 10,000 miles as i am getting carb problems at mid throttle 3000 rpm.Full throttle is fine as there is plenty of fuel to mask the midrange weak mixture.You will find it very difficult to set up twin carbs if the slides are rattling around.Premier range with hardened slides might be a good choice.Going to buy a pair next week

eddyfiola

Hey thanks Rambo.

Is it correct to say that if the slides are worn then so are the insides of the carb in which the slide operates?

Where can I get the premier range?

mach1970

You can tell if the slides/bores are worn by reaching in your fingers inside and seeing if the slides wobble inside the bores. What is really happening is the bores are worn, putting new slides in will not fix your problem because of the worn bores. You have to either replace the carbs or have the bores bored/sleeved. The original and some of the new Amal carbs used bores and slides made of the same materials so they would wear each other out. The new premier Amal carbs use hardened slides so that won't happen any more. You can buy them directly from amal or elsewhere.

Rob