The latest app for final transmission belt tension adjustment and verification for KYMCO AK550 euro4, as improvement of the existing app AK550 Tool kit

PROCEDURE
1) remove the lower belt cover
2) position the mobile phone so that the microphone is very close to the belt, in the middle of the lower span
3) push START button
4) in 2 seconds, pinch the strap in the middle of the lower span once
5) at the end, the measured tension is reported in newton ([N])
6) if necessary reposition the mobile phone, press the RETRY button and repeat from point 4

Be sure to perform each operation in compliance with the safety regulations and using all necessary accident prevention devices.

NOTE
This app is a smart, cheap and practical tool, but it is not an official measurement tool.
Use Sonic Tension Meter to get certified values.