OzVMX Forum

Clubroom => Tech Talk => Topic started by: Kenneth S (222) on August 11, 2013, 06:47:00 am

Title: XR 250 Won't run without choke on??
Post by: Kenneth S (222) on August 11, 2013, 06:47:00 am

Hi Guys,
I'm restoring an old XR250 and yesterday got it started. My experience with 4 strokes is next to nothing so need some help sorting it. I've given the carb a thorough clean and it has a new Unipod air filter. The bike starts pretty easy with the choke on but after warmin the motor up for a couple on minutes, as soon as I turn the choke off it dies in the ass. What does that mean? Are the jets too small so it needs the air restriction to get the mixture right?

Title: Re: XR 250 Won't run without choke on??
Post by: bazza on August 11, 2013, 07:57:00 am

bit lean or air leak

Title: Re: XR 250 Won't run without choke on??
Post by: head on August 11, 2013, 08:25:45 am

Pilot jet blocked

Title: Re: XR 250 Won't run without choke on??
Post by: oldyzman on August 11, 2013, 09:20:57 am

 DIDO
Blocked Pilot

Title: Re: XR 250 Won't run without choke on??
Post by: evo550 on August 11, 2013, 12:03:08 pm

Air screw setting?

Title: Re: XR 250 Won't run without choke on??
Post by: crossedup2 on August 16, 2013, 12:25:41 pm

Blocked Pilot Jet!! Some of the XR's blocked up in the tube leading to the inlet and are not easily cleared. The jet itself may/will appear clear!

Ultrasonic cleaners sometimes cleared the tube. Goodluck.

Peter B