Noobie here...was riding suddenly bike stalled when changing from first to second gear...about to corner released clutch then rear tyre skidded...pls help what happen? XT660z 2009.

Firstly, welcome to XT660.com

Your problem is quite common and is almost always simply down to a low warm idle speed.

Make sure the motor idles at between 1400 and 1500 rpm when it is up to temperature. Sorting this should cure your involuntary stalling issues.

__________________

Thanks