How Soon Should Power Valves Open?

R

razorboy

Member
Jul 12, 2005
186
0
Hey fellas,

I had my HPP covers off last night to see if the problem with my bike could be related to them.
I had to rev the bike pretty high to get the valves to open. Is it normal that they basically open quickly at high RPM's? I thought that they would open gradually with the amount of throttle applied but was surprised to see that they stayed closed until I was really screaming the thing....

Does anyone have some factory manual information on this HPP system that they could post or email to me? I have a manual but it is not the factory one. I am interested in the proper factory method of setting up the HPP system.

Thanx In Advance....

Bernie
 
R

razorboy

Member
Jul 12, 2005
186
0
Thanx,
It helps but doesn't give me an indication of the amount of RPM required to start to see the valves open?
 
C

CRguyStan

Member
Dec 10, 2001
154
0
The valve is opened by an actuator that is driven via centrifigal force. Thus it will open all at once with normally a spring return that will close it quickly as well. I wouldn't want to guess when it will open, this varies bike-bike depending on port timing in the design process and such, but it will be pretty high, that is why is is hard to "stay on the pipe" because this entails keeping the bike revved high most o the time (assuming mx type riding).
Stan
 
R

razorboy

Member
Jul 12, 2005
186
0
Thanx Stan,
I guess I will assume that my HPP system IS functioning correctly then...

Bernie
 
ellandoh

ellandoh

dismount art student
~SPONSOR~
Mi. Trail Riders
Aug 29, 2004
2,958
0
how does it ride, i used to have an 88 still affectionately known in this area as "the 88" :nod: it ripped , i never had any problems keeping pace with the new bikes
 
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