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Location:
Canberra
Registered:
May 2002
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Re: Setting up 2tg carbs, the basics?
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Sat, 09 July 2005 09:58
 
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Hey man, glad to hear someone is still playing with carbs.
No 1, If you have the correct manifold, with the ports connecting No 1+2 cylinders, to No 3+4 cylinders, then you are in good shape.
3 air lines, dizzy vacuum, charcoal cannister, and crankcase PCV valve.
Adjusting screws, 1 at the base of each stack, closest to manifold, these are mixture screws. Set the mixture on each by gently turning the screw clockwise, until it just bottoms out.(not too tight, or you will stuff the taper on the screw) Next step, is to unscrew that screw by 2.5 turns. Do that for all 4 screws, and your idle mixture is pretty well set.
Main fixed jets within the carby, will look after all, but idle.
To set throttle butterfly position, there are 2 screws located on the linkage that joins both carbs. One will adjust idle RPM on both carbs, the other sets the balance between the 2 carbs, have a close look, and a twirl with a screwdriver, and all will become obvious.
Then, it is time to start the engine.
Back off the idle stop screw ,and adjust the balance screw, so that both carbs are flowing around about the same, this will take a good ear, then adjust final idle rpm with the idle stop screw, a bit of stuffing around and experimenting, but will be worth it when you have a nice smooth idle.
cheers Chuck.
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