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2-3. ENGINE
A. Carburetor
1. Idle mixture
The idle mixture is set at the factory by
the use of special equipment. No attempt
should be made to change this adjustment
by the dealer.
1. Do not adjust
T h r o t t l e
2.
Turn the throttle grip to see if it operates
properly and if the play is normal. Make
certain the throttle snaps closed when
released.
3. Synchronization
NOTE:
Ignition timing and valve clearances must
be set properly before synchronizing
carburetors.
Procedure:
a. Turn fuel petcocks to "PRIME", and
remove the plug screws for the adapter
attachment holes in the carburetor body.
b. Install the attachment and set the vacuum
gauge.
c. Start motorcycle and allow it to warm up
for 2 - 3 minutes. The warm-up is com-
plete when engine responds normally to
throttle opening.
d. Adjust damping valve on each vacuum
gauge until the needle flutters only
slightly. The gauge needles must respond
quickly to rapid opening of the throttle.
e.
Both gauge will indicate the same reading
if the carburetors are synchronized.
f.
Turn the synchronizing screw until the
gauge readings are the same.
1. Synchronizing screw
After adjustment, firmly tighten the plug
g.
screws.
NOTE:
Check gasket. Replace if damaged.
4. Idle speed adjustment.
NOTE:
Carburetors must be synchronized before
setting final idle speed.
a. Start the engine and warm it up for a few
minutes.
b. Set the engine idle speed to specified rpm
by turning the throttle stop screw in to
increase the engine speed and back off the
screw to decrease the engine speed.
Use a tachometer for checking and adjust-
ing the engine speed.
Standard idle rpm:
1,200 rpm
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