Homeade PV cover mod?

[jgas]

I have not seen the inside of a GG powervalve, so please forgive my ignorance if this is a stupid question. My question is regarding a larger PV cover for more bottom end. Why not simply buy several gaskets and space it out to increase volumn? Or make a homeade spacer using the gasket as a pattern? How much larger are the aftermarket covers?

Thanks.

[Elvis74]

take this one
http://www.gasgasrider.org/forum/sho...7&postcount=35

[Jakobi]

[HenrikSchmidt]

I've made many tests on different volumes, and about and inch seems to be the space needed to boost the bottom end the most.
I have made a few of theese and I also have made a adjustable one, and they work great.
Here is the first of the non adjustable..(I know the bike is dirty, the picture is taken after testing the cover)

just, PM me if you are interrested in one or the other..
I could also make a spacer for the original cover, but this one look's more bling

[bonkeye]

Originally Posted by Jakobi

what is the thickness of the spacer? whay about the bolt in the center wouldnt that need spacing out aswel ?

[swazi_matt]

Originally Posted by HenrikSchmidt

I've made many tests on different volumes, and about and inch seems to be the space needed to boost the bottom end the most.
I have made a few of theese and I also have made a adjustable one, and they work great.
Here is the first of the non adjustable..(I know the bike is dirty, the picture is taken after testing the cover)

just, PM me if you are interrested in one or the other..
I could also make a spacer for the original cover, but this one look's more bling

An inch? I have a 15mm spacer and the bottom was nnoticeably improved, may have to get an additional 10mm so I can throw away the clutch lever!

[HenrikSchmidt]

Yes, indeed an inch, or almost.. I ended up at 24mm, so if you have a 15mm spacer + the original cover are already spaced 6mm youre ending up at 21mm, throw in a couple of gaskets and you're there

[Jakobi]

Originally Posted by bonkeye

what is the thickness of the spacer? whay about the bolt in the center wouldnt that need spacing out aswel ?

I had them machined at 8mm each so I could run any combination to do some testing. I however have been super lazy and just run on the 1. The center bolt hole can either be sealed up with a nut and bolt, or I simple used a bolt still and just snugged it up. You don't want to over torque it with nothing behind it. Thats for sure!

[bonkeye]

Originally Posted by Jakobi

I had them machined at 8mm each so I could run any combination to do some testing. I however have been super lazy and just run on the 1. The center bolt hole can either be sealed up with a nut and bolt, or I simple used a bolt still and just snugged it up. You don't want to over torque it with nothing behind it. Thats for sure!

how was the diffrence to the bike with the 8mm spacer? HenrikSchmidt mentioned a 15mm spacer would that give better bottom end tourque than the 8mm spacer?

[Jakobi]

No idea,

I fitted it at the same time I went from a 300 to a 250 top end. It wouldn't be fair to compare them. In saying that it still lugs very well. I can always drop a second spacer in to get 16mm+ the original cover as a comparison. I just havent felt the need.