Why do oversized PV covers do what they do?

[(F5)]

Erm as in draw? Not really. I'm just saying that you are right in that the pv drum and gate are positioned to be effective when at high rpm but the drum opens up the chamber at low rpm to disrupt the return wave from doing harm. The additional volume of the pipe doesn't work to alter the speed of the wave for benefit if you see what I mean.

[Jakobi]

I hear you! But I like drawings..

So the extra volume actually results in? What is it that people are feeling? I haven't done any crude - big changes, back to back to gauge the over all effect of it alone.

[(F5)]

The chamber has to be big enough to disrupt the wave when it is unwanted.

[memphis2857]

OK so this thread has me wondering. Quick rundown of my bike. Ltr power valve cover, steahly 8oz. Fw weight, ltr jet kit and the head is milled. It is very much like an old farmall tractor in the woods. Tons of torque and will lug around in second and third gear all day. BUT it just seems flat from mid to top. Been considering ditching the flywheel weight. I bought the bike the way it is so Idk what it would be like. What's your thoughts?

[john r b]

Ditch the FWW ,if it's a 300.

[richgilb]

I ditched the flywheel weight and mine's a 200!

[forgiven]

The FWW is most likely NOT your problem. I have a very similar setup and it revs quick. All it did was give me some out of the corner grunt, not anything earth shattering but noticeable. Did not notice one bit on the acceleration. The steahly may be different since I got the GG/S3 or whatever Gofasters had for it.

I can tractor mine around, and yes the LTR cover, head mod, and FWW all add to that.

[forgiven]

Do you have a Gnarly pipe on it or any FMF head pipe on it memphis.

Every GG I have ridden that signs off early had one.

Maybe the House of Horsepower is calling your name?

[memphis2857]

House of Horsepower!? It sounds awesome but what is it?

Also I have an FMF fatty pipe on it. And to make matters worse I had to switch to my Gnarly pipe temporarily until my fatty gets back from pacific for repairs. Keep in my mind prior to this bike I was on an 01 CR250 for 10 years and nothing revs and hits faster or harder than those motors so a lot of my complaint might just be ME!

[memphis2857]

Forgiven I would like to just buy your bike and not worry about mine. Lol got generate a little cash and convince the other half why I "need" it first though