I purchased a used 2013 KTM 250sxf early last year with 105 hours on it. The bike ran flawlessly when we first got it. Over the course of the next 5 months (now at 121 hours), the bike began to want to die when idling. This winter I decided to have the engine rebuilt completely. So I took the engine to the local KTM shop with all new OEM parts for the rebuild (Piston kit, connection rod kit, all new bearings, gaskets, valve kit, etc...) However, after the engine rebuild and installation, the problem is still there.
I also replaced the filter attached to the fuel pump inside the tank. Replaced the tiny inline filter that comes from the tank to the throttle body as well.
The shop pulled the injector and cleaned it and checked the spray and said it was working fine.
Any suggestions or ideas would be appreciated.
Thanks