Twin Chamber GasGas forks for 2010 300R!!!
 

Seeing as though GasGas didn't think of offering twin chamber forks, here is a conversion on my EC300R 09.

Rides a bit smoother and my laps times were down when tested on the usual loop so I even raced with them on the weekend and found them pretty damn good. The 0.44kg spring rates were a little soft for me but that is easy fixed too as I have new set of Showa forks with heavier springs coming soon for my 2010 300R!

whats involved in the conversion?
and what kind of dual chamber fork did you use?

My 07 came with beefy 50mm twin chamber Zokes with the fancy black dlc coating. What would be trick are the new 53mm zokes.

I used a CRF set of forks, brakes and wheel. The 47mm forks are 1mm smaller diameter than the 48mm sachs, so I had to sleeve them. I used the CRF 240mm disc, but might have to get and oversize (for Jap bikes) 260mm like a standard gasser.

so the stock gg clamps, but with a 1mm sleeve between the clamping surfaces, otherwise just straight off a crf X or R?

Yeah...pretty close. I used 20thou (1/2mm) aluminium shim material for the sleeves. The axle seems fairly tight on the right hand side so when my R forks turn up I might have to lathe a tinny amount off the r/h wheel spacer.

Keg, I am interested in updating my EC250 08 from a 45 Mazzorrchi to a 47mm SHOWA from a crf or rmz. Do yo think I can use the same triple clamps just machining them down by 2 mil? Thanks

Does anybody know the showa fork tube diameter at top and bottom triple clamp positions.

I got my 45 marz on my 08 300 to work better than the showa's on my 03 cr 250...when I say better I mean plusher and compliant as well.
But I only do singletrack, no MX/jumping or high speed desert.
Mabye with some more shim movement I think they may work well there too.

I did a Taco kit (smart performance) on a friends CR and after re-working the kit a few times (softer) we got the fork to work pretty good...riding both bikes back to back on the same stretch of trail we both though the marz felt just a tad plusher on the heavy rooted sections.

With the Marz, I went with the heavier spring and lighter compression valving concept as well as stiffen up the rebound side to compensate for the heavier spring.
I also lightened up the mid valve by adding more float and a softer check plate.
The trails here in Hawaii are not like anything have ever ridden before mostly due to the root shapes which are like a board standing on edge "square" running in all different directions, now immagine someone greasing them and then spraying them down with water...you get Hawaiian ice... So now let's add quick elevation changes,rocks,logs covered with a slimy moss, sorry I forgot the sudden down pours and flash flooding.
First few dozzen time I road these jungle trails I was picking up my bike more then I was riding it.
So, I guess my point is I am now very happy with the Marz and don't feel the need to change the fork.

Moto9,
My zorks are working perfectly in single track extreme rocky conditions here in Greece (after I revalved them at the gasgas representative). My main complaint is that they are not progressive at the end of the stroke causing the fork to bottom easily. That is why I would preffer a twin chamber set up. I will try raising the oil level to 90cm and see how it works on the weekend.

Thanks