Ok does that indicate that the tappets need be tightened......??

It might. Worth checking.

Hi,
Any statistics on how many flights between filling the mount dumper with oil?

My YS200 has just clocked 100 flights and I haven't touched the oil damper.....

Has anyone used a temperature sensor for telemetry on the ys 200? If so, where did you place it? Would be interested to see if it’s possible to adapt the spark palug washer to take the thermocoupl.

Is there a thermocouple washer that you know of? I've been thinking about installing the sensor between fins on the back and secure it with red RTV but have not done it yet.

Seems like such a thing exists. Issue is whether there is enough clearance round the plug to allow it to seat without having to file the OD of the washer which might affect its calibration

https://www.ebay.co.uk/itm/314800632...YaAtSfEALw_wcB