Oversize powervalve cover.

[swazi_matt]

today i have installed the TRUSTY Adjustable Powervalve Cover
damme,what a difference
on -6 drive like a 50cc 2 stroke with lots off torque,mount slowly to his rpm
on +3 when you hit the trothle ,bwaaaaaaaaap,lots off power,even more than a mx bike
amaizig kit for 100?(i was suprised for that price)

Please tell us where you got it for that price, i have seen it advertised for 350GBpounds!

How easy is it to make adjustments when on the trail?

 

[blanc]

Was he joking? Best I can find is 279. Do they work on the 200?

 

[HuskyDude]

Trusty Power Valve covers

100 buck for the non adjustable...maybe.

 

[gasser]

I wonder if a LTR powervalve cover could be drilled out and made to work with the Trusty internals?

 

[deluc]

my english is not that good so I will work with google translator.
I called him today to ask if he still has at that price
No was the answer.
It was an aftermarket product and it did not fit properly
I've made a few adjustments to make it fit (rather large adjustments)
everything worked perfectly until I had to put the lid and noticed that almost a quarter inch difference was on the bolts.

installation is simple, put your engine on his right side, cover removed left pv
Remove the bolt holding the bearings in place of the PV hold and pull out the pv.
cutting the shaft near the second roller bearing, remove one roller and make a cut in the ashes.
then insert the tube into the opening where a roller is missing, then reinstall the spring in the tube and falls into the cut you give done.
it falls on the other side in the notch of the adjuster.
in this way gives you more or less force to pv.

The dealer will call me tomorrow for a price of the new variable pv
but I am afraid that this will cost a lot more
I hope for a good price and will surely informed
Tomorrow I make them open and will take pictures and then everything will be much clearer

One thing is sure, the soft mode you have all the power without breaking out
in the hard state, incredible gas response

 

[deluc]

I wonder if a LTR powervalve cover could be drilled out and made to work with the Trusty internals?

if you would make a hole right but perfectly straight on the roller pv
you take a road roller and a tube that takes the place of the roller bearing is.
you put a spring on the pv axis and if you can run from left to right, before or after you give power to the pv.
that's the way it works

 

[webmaster]

So has anyone in tried this with a FMF Gnarly pipe? There seems to be a mixed review on this item.

That is because the power valve cover will provide more gain when using a rev pipe versus a bottom end pipe (like the gnarly). The bottom end pipe already has alot of volume with the design of the pipe itself.

With a rev pipe it adds volume to the exhaust and makes it behave like a gnarly when the power valve is closed and the pv chamber open to the exhaust tract. When the power valve opens - the pv chamber is "turned off" - so the rev pipe does it job up top.

Bottom line, with the oem pipe, doma, etc. it will buy you some bottom with no cost to the top end power.

jeff

 

[deluc]

changes that i have to make to the pc axes
you see 1 bearing is removed

little piece that fits over the axe

like this

 

[deluc]

spring

fits like this

button

fits like this

 

[deluc]

piece i have to moddify

assembly

 

[deluc]

completed after 30 minits
i hope this help people out off questions

 

[stainlesscycle]

neato.




.

 

[Todd5774]

Looks good, very clear pictures.

I actually removed my oversize cover at the weekend and have gone back to the standard item, as didnt like the way the bike delivered the power, prefer it alot more revvy.

 

[swazi_matt]

looking at the pictures it seems like you could manually adjust the powervalve, as the adjuster seems to be turning the screw in the centre. So you could remove the cover adjust pv and replace cover. Is this correct? I am not too clued up on the PV internals or how it works

 

[swazi_matt]

Looks good, very clear pictures.

I actually removed my oversize cover at the weekend and have gone back to the standard item, as didnt like the way the bike delivered the power, prefer it alot more revvy.

you thinking about selling the PV cover?

 

[GMP]

No, you can't adjust it manually, the knob does not act directly on the drum valve.. Look at the PV design and function. Like all PVs its driven by a fly ball governer thats opposed by an internal spring. Since all the PV parts are linked together, if you add a torsional load in the form of a spring to the left drum valve, the overall force on the governer will either be greater or less than the governer spring alone, depending on the direction the torsion spring is turned with the knob.

 

[elemetal]

Little off topic but: each side of the PV has an exhuast/breather port that leads to a bleed tube down the frame. One of the bleed nipples at the PV has a tiny (.025") hole, the other is about an 1/8"; which nipple goes on which side? I'm guessing the tiny hole goes to the less active (rt side on bike) cover.

Hijack off

 

[GMP]

The right (clutch) side PV compartment also doubles as the transmission vent, therefore the nipple used is the one with the large hole. The other is the left side drain fitting.

 

[elemetal]

Thanks GMP, it's a little bass-ackwards from first glance but that makes sense.

Might actually have this thing running next week.....WHOOHOO!

 

[iancp5]

No, you can't adjust it manually, the knob does not act directly on the drum valve.. Look at the PV design and function. Like all PVs its driven by a fly ball governer thats opposed by an internal spring. Since all the PV parts are linked together, if you add a torsional load in the form of a spring to the left drum valve, the overall force on the governer will either be greater or less than the governer spring alone, depending on the direction the torsion spring is turned with the knob.

How do you adjust it then? Is it a spring change like KTMs?