Originally Posted by hrcs90
The older BMW F650's single sparks from 01-04 suffered the same kind of stalling. Which was a result of lean fueling around idle speed area and cured with a fuel controller of some type.
The stock XR650L has the same stalling due to an overly lean carb. Jetting is ruined for emissions conformance. Yamaha actually put a back door hack to richen up the WR250R from the dash input to help with this issue too.