78 MOTORCYCLE CLASSICS September/October 2019
26
In this case, the carburetor on
the left was slightly more open
than the right, resulting in a lumpy idle.
Use a 9/32-inch or 7mm wrench to
adjust the cable.23
Pull the cable back, attach it to
the gantry and adjust it until
there is minimal slack. Test for smooth
operation and full return.27
With the tank and seat back on
the bike you can’t even notice
the change. What you will notice when
riding is a quicker throttle response, so
you’ll have to retrain your wrist to the
new reality.19
Now that everything’s assembled
you can take up the slack in the
gantry with the new idle adjustment
screw.
21
Fit the throttle grip end of the new
throttle cable to your grip. Now is
a good time to renew the grease in the
assembly and check for good function of
the assembly.24
Refit the balance tube, passing
the left carburetor end
through the hole in the gantry. Clamp
it to the stub. A small outside diameter
hose of sufficient strength fits better
than the one I originally fitted.22
Run the gantry end of the new
throttle cable through the frame
and attach the cable end barrel to the
rightmost slot in the gantry arm.
25
If possible, before you refit the
tank, check your carburetor
synchronization. I used a TwinMax, but
there are many options.
20
When you have the slack out of
the new setup, back the old idle
speed screws out about one turn each.
They now have no purpose in speed
regulation.MOTORCYCLE CLASSICS
HOW-TO