Tuning Dual Carbs Question
#1
Posted 20 April 2018 - 12:57 PM
I understand that when you push on the lifting pin and it increases and stays increased...its too rich. If it increases and then almost dies...its too weak. Mine definitely decreased on one carb, but doesnt increase at all. The other would cause the engine to die almost immediately with still no increase. I made some adjustments and the motor doesnt seem to die, but still cant get it to replicate what its supposed to do. Do I just need to keep adjusting?
#2
Posted 20 April 2018 - 01:31 PM
You need to check that at fast idle they are both drawing the same air....before adjusting the mixture
Its a bit if a faff but with the air cleaners of and some hose....
Listen to each carb to make sure each has the same noise, the hose has to be in the exact same place on each carb mouth.
Its then a case of adjusting the idle screws so both carbs sound the same.
Then the mixture can be set accurately at a fast idle.
Then turn each idle screw back the same amount to set the idle
All of the above assumes there is no linkage affect from the choke, and nothing binding or sticking
You sometimes find the legs on the linkage need adjusting
#3
Posted 20 April 2018 - 04:30 PM
#4
Posted 20 April 2018 - 06:44 PM
As they do seem to be running well lean, check you haven't got a vacuum leak too and this could even come from the carb spindle bushes.
#5
Posted 21 April 2018 - 12:46 PM
Thanks!
#6
Posted 21 April 2018 - 05:13 PM
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