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NOTE: Perform this task with the engine at normal operating temperature and transmission in neutral. Place the motorcycle on a level surface.
Remove the fuel tank mounting bolt and carefully raise the tank and support it above the frame and near enough to attach a tube from the tank to the fuel inlet tube.
Remove the air cleaner housing (see valve task ).
Remove the rear cylinder head left-side fin. |
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Remove the vacuum plugs and washers from the cylinder head intake ports. |
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Connect the vacuum gauge and adapters.
TOOL: Vacuum Gauge Attachment
07510-3000200 or 07LMJ-001000A (USA only |
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Connect a suitable tube between the tank and the fuel inlet line. Turn fuel valve on and start engine. Adjust the idle speed to 1,000 +/- 100 rpm.
Check the difference in vacuum between each carburator. |
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Note: The base carburator is the REAR carb. (No.1)
Carburetor Vacuum Difference:
27 kpa (20 mm Hg 0.7 in Hg)
Synch the carbs by turn the adjusting screw located between the two carbs and accessable through the hole provided in the frame.
Be sure that synchronization is stable by snapping the throttle several times and re-checking idle speed and vacuum difference. You might have to re-adjust idle and synch several times to find the proper "balance". |
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When everything seems stable and adjusted, stop engine and disconnect the vacuum gauge and adapters.
Install the vacuum plugs and washers and tighten to 3 N-m (2.2 lbf-ft) of torque.
Install the rear cylinder head left-side fin, the air cleaner housing and the gas tank. |
