The wego at home has been running normally for a little under an year. Yesterday morning I took it out, and did the usual routine - let engine idle for 30 seconds, go slowly for 5 minutes and then ride normally. It accelerated normally and suddenly started loosing momentum and stopped. I had to push it back 3km to reach home. I tried kick starting as well as button starting it and the engine used to come to life, a little bit of throttle later, it simply stopped.

I verified its condition and its the same today.

What could be wrong with it ?

Also, its under warranty and I plan to take it to the SVC soon. Kindly advice on the approach I should take with the service people. I have heard several horror stories of service centers cheating people and I plan to take every precaution against that and have solid legal defence against TVS in case of eventual trouble by:

1. Take a video of the initial conversation with the SVC and also after they fix the issue, to ensure that whatever they say is on record.
2. Get them to sign an undertaking stating whatever they have done with the vehicle and also note if they refused to listen to me and replace a part and chose to fix it instead. If they refuse to sign an undertaking, then videograph their refusal.

Any other suggestions ? I plan to sue the living daylights out of them if they cause ANY trouble and escalate the issue to ridiculous proportions and bring uber-loads of negative publicity behind me.