OzVMX Forum

Clubroom => Tech Talk => Topic started by: evo550 on June 28, 2011, 06:34:22 pm

Title: Powervalve Question.
Post by: evo550 on June 28, 2011, 06:34:22 pm

After just reassembling a HPP honda powervalve system I noticed that the activator was spring loaded (I'm assuming to control the opening of the valve), this spring is pretensioned by a screw with a 20mm pin attached to the end.
Question is if the length of the pin is changed, therefore changing the pre tension on the spring, would this change the activation of the powervalve, If so what would the effects be? I know modern KTM 2t's have an adjustable powervalve, by changing the actual spring.

Title: Re: Powervalve Question.
Post by: Lozza on June 28, 2011, 11:09:32 pm

Generaly more preload on the spring delays the PV opening point,giving more bottom end. I think they open fast after the preload is over come