The throttle is very noisy and stick'n'slip

It sounds like you are referring to a mechanical issue on a pedal (set). Generally, for problems described by customers as "noisy" or "stick & slip," it could be helpful to lubricate the relevant joints. However, I am unable to provide specific information on where lubrication might be needed or which lubricant to recommend, as it is unclear which product the query is referring to.

Please describe the problem as precisely as possible, including all symptoms you observe that deviate from the normal, expected behavior.
It is extremely important that you specify the exact product name in questions like this?

Thank you very much!