i would say no...we have a few polaris snowmobiles and the heads have been shaved by a professional, it works great i must admit, but if its not done by a professional and its not precisionly flat, if it is somewhat on and angle, it will lose compression. too much compression is bad for these tiny putt putt motors, theyhave thin walls which only have a thin chrome layer then cast iron, the engine is so small that the pressure will cause extreme wear and will dramatically reduce the life of the engine.
but, maybe you should refer to a professional. i would not recommend it, i think it would risk the life of your engine. cool ideal though.