125-200cc Thickness of the stock base gasket - wr125 09

Hi freinds, this forum is great!
Can someone please tell me what is the thickness of the stock base (cylinder) gasket for wr125 '09 (the one that came originally from the factory..)??
Thanks!!

0.8mm I think(thickest)

I think it was .5mm - from memory
I ran a .3mm one recently

i also think stock was 0.5mm. i ran the 0.3mm with the 144 kit, ran great. bumped up to the 0.8mm with the 165 kit.

maybe I was thinking of the 300s? 0.8mm with 165 though is correct

How can I be sure? It doesn't mentioned anywhere in the workshop manuals I have...

It's .5 mm

he'd know^

ok - take us to school on this, why the different thickness offered and how do you determine which gasket you need. Thanks

On the 125 - If you use a .3mm gasket you will lower the cylinder and head .2mm which increases the compression ratio
It will reduce the squish band thickness to approx. 1mm - basically the gap between the piston and head - also changes the port timing slightly so its better to get the head machined instead
but a cheap way of generally pepping the bike up a bit . You can do a solder test to get a squish band reading .
You need to watch out for detonation though
Have a look at thread index - under head mods

Someone knows if the Mitaka top end gasket kit comes with few base gaskets in different thickness? I can't get info about it.

Any suggestions on reputable machine shop guys that can mill the head?

Check out RB Designs.
http://www.rb-designs.com/

^^++++1