How do you adjust the carburetor on a 50cc scooter?
With the engine idling, turn the idle mixture screw clockwise in ¼ turn increments until the engine drops in speed. Count how many turns this takes. Turn the screw counter clockwise in ¼ turn increments until the engine revs back up and drops again. Count how many turns this takes.
What is the proper idle rpm?
Wrong Idle Speed – Most cars have a proper idle speed, usually between 600 and 1000 RPMs. Idle car speed can change due to wear and tear. Fortunately, an adequate tune-up can restore the correct idle speed.
What should the idle speed be on a scooter?
If it still won’t start after that, it’s time to clean or replace the carb. While dialing in the air/fuel mixture, you will most likely have to adjust your idle speed down a bit. If the scoot tries to move on its own while you are tuning it, the idle is way too high. Set the idle around 1,000-1,400 RPM if you have a tachometer.
How do you adjust the idle speed of a carburetor?
Thus, your carburetor will need to be adjusted to accomodate less air in the atmosphere. Adjust the idle speed by locating the small spring-loaded screw which is usually located next to the throttle control. If you have a tachometer, turn the screw until you reach an idle speed between 1500 and 2000 rpm.
How to adjust the air / fuel mixture in a scooter?
Start your scooter and let it run for 10 minutes to get the engine up to operating temperature and allow the auto-choke (enricher) to close completely. If the carburetor is so far out of adjustment that the scooter won’t start, turn the air/fuel mixture screw all the way in until it stops, then turn it back out about 2 turns as a baseline setting.
Why does my scooter stall out when idling?
And the obvious question, is your scooter stalling out when idling? If the answer to any of these questions is yes, they are all symptoms of your engine valves being too tight. Engine valves tighten over time after extensive use.
Is the Yamaha Vino 50 service manual legal?
Any reproduction or unauthorized use without the written permission of Yamaha Motor Corporation, U.S.A. is expressly prohibited. Printed in U.S.A. P/N LIT-11616-14-50 EAS00002 NOTICE This manual was produced by the Yamaha Motor Company, Ltd. primarily for use by Yamaha deal- ers and their qualified mechanics.
What to do if your motor scooter won’t idle?
If you find the intake valve is too loose, twist it by hand in a clockwise direction until you reach the desired clearance level. Once you are happy you can just about slide a .004 feeler gauge behind your intake valve then you can re-tighten the intake valve nut and reassemble the intake valve cover and the rest of your scooter.
How to prepare a Yamaha Vino for disassembly?
PREPARATION FOR REMOVAL AND DISASSEMBLY 1. Before removal and disassembly, remove all dirt, mud, dust and foreign material.
What kind of oil is in a Yamaha Vino 50?
G Engine oil H Gear oil I Molybdenum disulfide oil J Wheel bearing grease K Lithium soap base grease L Molybdenum disulfide grease Symbols M to N in the exploded diagrams indicate the following.