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Txt pro 250, hot start issues and backfire

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Hello.  Can someone please help.

My 2009 starts easily from cold. However when hot it gives a little backfire when kicking and eventually starts. 

I've done everything to try eliminate.

Carb cleaned twice, new reeds, new plug, new plug cap , adjusted fuel screw etc etc.

Have a 2008 which is much easier to start....

 

Any suggestions much appreciated.

Thank you

 

  • Author

250cc , dellorto, 300 mtrs above sea level.... 

Thank you lineaway 

 

 You need a 36 to 38 pilot and might want to go up one size of main jet. When you clean the carb you need to make sure the pilot circuit and the choke circuit blow clear. Good luck.

On 10/29/2022 at 12:29 AM, lineaway said:

She be running lean. What size bike and what carb and your elevation.

Elevation not applicable in uk.

Had same problem. Newer, but same carb.  Flip the choke on. Try that.  Works on my bike. Stil, starts easier cold.  

Something else to try is to pull it back in gear, as already mentioned, and give it a bit of throttle 1/8 or 1/4 turn. This seems to be necessary on the bikes with Keihn carbs.

I even use a touch of throttle with the choke when its cold and that was always a no no with delorto.

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