2007 Yamaha Apex Factory Service Manual, Page 540Get this manual

2007 Yamaha Apex Factory Service Manual, Page 540

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SYNCHRONIZING THE THROTTLE BODIES
7 Adjust: throttle body synchronization aWith throttle body #1 as standard, adjust throttle bodies #2, #3, and #4 using the air screws #1#2#3#4 NOTE: After each