250-500cc Base gasket thickness & performance

My friendly dealer advised the the two easiest ways to gain performance on my WR250 was an aftermarket pipe (FMF Gnarly... check) and to put a thin gasket in where the cylinder meets the case. My gasket from the factory appears to be .015 or less so I doubt if there is anything to gain for me but I was wondering if anyone else's WR250-300 came with a thicker gasket. My 250 has more power than my skills can use but I thought others might want to know this.

Alters the exhaust port timing slightly and compression - thinner more low/mid and thicker mid/top.

If you had to to want to go lower than you really need to calculate your squish area and get the head skimmed...then you have to readjust the exhaust timing depending on how far or much you have skimmed the head.

l've never done it but a few racer mates have blueprinted their 2t engines just to the the middle of a manufacturers tolerances and the smoothness and reponse is pretty bloody good.

I hab RB Designs set my squish when my bike was new(08 wr 250).Now I will use different base gaskets to keep the squish correct when doing a fresh top end in case of any variables with the piston.

Buy the race head - cheap as chips, and gives a big boost to bottom end and mid range. Takes only 30 minutes to fit and increased the compression on mine from approx 155 to 185 psi.