The engine stalls often while riding

The bike shuts off on its own — at a stop, while decelerating, when you let off the throttle, or while riding with no obvious pattern. It's annoying and sometimes dangerous (stalling mid-maneuver, in a corner, or in traffic). The cause is most often related to fuel supply, idle adjustment, ignition, or electrics, and the approach is to look for what all the stalling situations have in common. Main causes: irregular fuel delivery (a blocked tank vent, a dirty fuel tap/filter, a pinched line — the engine is intermittently starved of fuel), an idle speed set too low (the engine stalls as soon as you let off the throttle or when stopped), a failing spark plug or plug cap (ignition cuts out intermittently, especially when hot), a loose electrical connection (a loose ground, damaged wiring, a temperamental kill switch that cuts the engine unpredictably), or, on fuel injection, a sensor that drops out (often with the check-engine light on). You can tell them apart by when it stalls (at a stop = idle; no clear pattern = electrical/fuel; when hot = ignition), whether the check-engine light is on, and how easily it restarts. Urgency: stalling can be dangerous depending on the situation (loss of control, being caught off guard in traffic) — diagnose it without too much delay. Start with the simple checks: idle speed, spark plug condition, tank venting, and grounds, before moving to electronic diagnosis. Recurring stalling always ends up having a logical cause you can pin down by noting the circumstances.