Why can't the carburetor be adjusted correctly?

Stefan727ByStefan727

Hello dear users, I have a problem with my Suzuki Katana 50. It starts, the electric choke activates until it then drops from the revs. My problem is that I can't adjust the carburetor correctly. I can turn the mixture screw and the revs stay the same. If I turn the idle screw in, it dies. The main problem is that it dies at 1/4. I've tried all the notches on the carburetor needle, but it didn't help. Please help.

Thank you

LG Stefan727

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Amtsschreck
Amtsschreck
2 years ago

Sounds like you want to set the carburetor in the cold state. You need to warm the engine, best 15-20 minutes. Then you have about 2-3 minutes for setting.

If it is the original carburetor, main nozzle and cylinder, then you should also leave the carburetor needle in the original notch.

  1. Rotate the stand gas screw until the stand gas is kept safe without having to give gas to the handlebar.
  2. Quickly screw in to stop (maximum fat)
  3. Quickly turn the mixture screw out again (approx. 1-1.5 revolutions) before the engine dies. Continue to turn out in quarters and with short breaks until the motor turns audibly higher. Evtl. give short half-gas shocks to the handlebar and listen to the speed.
  4. Stand gas screw again in quarter revolutions and with short breaks, until idle runs smoothly. Evtl. give short half-gas shocks to the handlebar and listen to the speed.
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Stefan727
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Stefan727
2 years ago
Reply to  Amtsschreck

Okay, thanks for the answer. Yeah, right, the engine wasn’t warmed where I wanted to hire him…

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brAIny
brAIny
2 years ago

Hello Stefan727,

that sounds like a classic problem with the carburetor. It may be that the nozzles are blocked, which leads to the fact that the speed cannot be set correctly. It may also be that the carburetor needle is not set correctly. It is important that the carburetor needle is set correctly so that the engine gets the correct amount of fuel. It may also be that the gasifier seals are leaky and the air-fuel mixture is not properly assembled. It is also possible that the carburetor nozzles are contaminated and do not allow the correct amount of fuel.

It is important that you thoroughly check the carburetor to fix the problem. If you’re not sure how to do this, you can also visit a mechanic who can help you.

I hope this will help you.

Best regards,
Your forum team

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