Question about 2007 Qlink Legend 250

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Dies with throttle 2007 Qlink Legend 250

Just bought my bike used, loved the way it looked: Problem is, it idles beautifully, but as soon as you throttle it dies out (same as hitting engine kill). Carb looks very clean, double and triple checked everything, all jets are clean, diaphragm appears to be in wonderful condition (was going to replace it, but it looks new, no light showing through). Can get into second gear at idle, then work the throttle enough to get it into third, but I can't just hit the throttle and go. Adjusted the fuel adjuster to 2 full turns out and air to 1 full turn out. The bike doesn't die instantly now on the throttle (delayed *****, actually tries to throttle). Since the air adjustment screw is buried inside the carb assembly, I am curious what this should be set at (don't want to tear it down, adjust, put back together, try, rinse repeat). I am almost certain it is air/fuel mix, but alas I could be wrong. Any suggestions? @

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Hi, Bryan and the usual suspects are:
1. Idle port, transfer ports, slow air jet clogged.
2. Idle adjusting screw set too low.
3. Air fuel mixture adjustment too lean.
4. Pilot/slow fuel jet clogged.
5. Faulty accelerator pump.
6. Float level too low.
7. Float bowl contaminated old fuel, water, dirt, rust, etc.
8. Carburetor bowl vent line clogged/blocked/pinched.
9. Fuel line to the carburetor kinked or pinched.
10. Fuel filter clogged.
11. Intake manifold leak.
12. The gas cap is not venting properly or fuel tank venting system blocked.
13. Vacuum line from the intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
14. Needle and seat stuck closed in the float bowl.
15. Multi carburetors not in sync.
16. Faulty fuel pump or internal fuel line has pinholes.
17. Fuel injectors clogged or faulty.
18. Faulty throttle position sensor.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.google.com/search?q=Dies+with+throttle+2007+Qlink+Legend+250&tbm=isch&source=univ&sa=X&ved=2ahUKEwiD-IjZmpfmAhVjw1kKHevKDj4QsAR6BAgKEAE&biw=1440&bih=757
https://www.reddit.com/r/motorcycles/comments/2biv2g/bike_idles_perfect_but_dies_when_given_the/
http://store.qlinkmotor.com/c/manuals_service-manual
http://store.qlinkmotor.com/c/accessories-parts
https://www.manualslib.com/manual/1192373/Qlink-Lg250.html#product-legacy%20250

Posted on Dec 02, 2019

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  • Contributor
  • 17 Answers

Hi have you checked fuel filter or filter in the tank also make sure the fuel line has no kinks you say the diaphragm looks good make sure there are no holes or it's not sticking as this will cause fuel level to be low in float chamber and cause fuel starvation.Good luck.

Posted on Oct 13, 2014

Testimonial: "Yeah, checked all that. Went ahead and backed the air off by 1/4 turn (to make it 3/4 turn out) and took the fuel down to 1/2 turn out. Purrs like a kitten now when throttled. Only put 20 miles on it this afternoon, but that's 20 miles with stops every block so it was a long ride (which since my problem was throttling from idle, this was what I needed to feel satisfied that this problem was resolved)."

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