Purchased used Zongshen RX3 2017 model like 3 months ago which has 14000km on clock.
Whenever engine is cold or not, symptoms remain similar.
1. Initial start is fine. It starts, but stalls if its left without throttle input (takes like shorter than 10s?) 2. Engine shows no visible problem when RPM is high and vehicle is moving. 3. Runs fine when throttle input is given, but stalls when load or inertial force is eliminated - like no throttle input is given or clutch is pulled, etc. 4. The most strange part is that, it is hard to start my engine right after engine stalls. Motor spins and making whirring noises but engine won't start like more than 10 seconds of whirring 5. But it can be started without much effort when I leave my bike more than 1 minute from the time of engine stall. 6. As for now, seems like I screwed up my one way starter clutch thingy due to obvious reason - trying to forcefully runs starter - electric start is not possible. Force start by running then releasing clutch is fine though
Replaced spark plug but no hope. No other problems.