The squish is set up conservative like this for different fuels around the world. Generally at the first top end I use a single .3mm. There are .3mm, .5mm, and .15mm(to be used along with a .3 or .5mm). As you know a thinner gasket brings comp up slightly and alters port timing slightly. No X and Y worries like a KTM. To get the most out of the motor you can go with a single .3mm and have the head cut to adjust squish and compression based on that gasket, and the fuel of choice.
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