Carburetor adjustment & Cleaning for Carbureted 250cc motors

[mrbios]

Updated: 05-13-2014

I updated and added a few videos.  Each one is between 3 and 5 minutes.

These two videos are of the carburetor version of the Grandvista, Grand Dink, People 250 and any other Kymco scooters or motorcycle? that use the 250cc motor.  After about 2009? Kymco switched to fuel injection so the information in these videos does not apply to any fuel injected scooters.

I deal with the pilot jet or slow jet, main jet, off idle hesitation, Throttle Position Sensor or TPS, aftermarket Keihin Carburetors, changing the pilot jet to a larger size, using an Ultrasonic cleaner and copper wire to clean holes that get clogged.  I also examine the vacuum diaphragm / vacuum piston. I also discuss adjusting the idle mixture screw or Pilot Screw.  I will add a third video when I perform the work of removing the carb on the Grandvista.

Kymco Grandvista / Grand Dink:



Carburetor Cleaning & Theory three part series:

[TLRam1]

Nice videos, thank you.

[mrbios]

Nice videos, thank you.

Your welcome.  I'll be uploading another one soon that shows the scooter being worked on - not just still photos.  It was a lot of time and effort but when I did research on my carb issues I found a lot of fragmented info on the web and very little info on the throttle position sensor - I still can't find out how the computer uses the information it provides..