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I bought a 1981 Yamaha Enticer for $900. -250cc single cylinder engine
Then it broke down and I took it to the Yamaha dealer to fix it. They replaced some parts in the carb and charged me $480, and it broke down again after 3 weeks. When I came to a stop and released the throttle, it turned off and would not start again, unless I waited around 50 minutes. After the 50 minutes when I did get it started, I could not get it to Idle. When I would push the more throttle, it would rev up a tiny bit. Then I release the throttle and it turns off after 5 seconds, And can’t start it again. Then I wait another 50 minutes and I can start it, same thing happens- Does not Idle more than 10 seconds. Then another little while and same thing.
Is this because it has to cool off. And when I do wait the 50 minutes, it starts on first pull. Between the time I took it to the Yamaha dealer to the time It broke down, it ran perfectly. (And I did not drive it over 65kph.)
-is it flooded?
-or is it lacking fuel?
-Do I need to adjust something?

Thanks
-I can’t even drive it at all. It just dies out after 1 minute. If I push the throttle more, It dies out a lot sooner. If full throttle, it dies right away.

Maybe a plugged vent line, or / and carb adjustment. And go back to the Yamaha dealer and tell them to test drive it.

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