|
First off, your carbs probably have ZH needles in them, which are standard for the type of B18 that's in 122s. Those are much too lean for a B20, particularly one with a performance cam in it. This is a big part of why it wants to surge. You should have KD or DX needles (try either one, they're very similar). You probably will not need to recenter the jets going from a fatter needle to a thinner one.
Sync the carbs at idle with the idle speed screws. If you're not deaf in one ear, just put your head down between the with the air filters off and balance the screws so they sound the same on both sides.
Next -- with the new needles installed -- adjust the jet height on one carb for fastest idle speed. Then do the second carb. Reduce the idle speed and resync with the screws as above, tweak the jets a bit more, etc. until it all comes together.
Adjust one of the cranks in the intermediate linkage (the rod between the carbs) so both pistons lift off at exactly the same time as the throttle is opened slightly. It's not important that they both lift the same amount, just that they start off together.
Put the air filters back on and you're done.
|
