I claim that the Zero is not more sensitive to temperature changes than the nitro version wrt pump adjustment. The pump adjustment and needle adjustment I have made is very minor and probably a mix of temperature and not being in properly tuned in the first place.

The pressure measurement “papaone” presented under the 200-thread is very interesting. And I agree it is not required for tuning a YS engine. However, if things does not turn out as planned, a very hypothetical situation though, I think it is nice if a pressure recording at idle and WOT can determine whether the pump is OK or not.

Arnstein