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Old 04-30-2002, 02:10 AM
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Default Porting 2 Stroke

You can gently smooth out the ports but do not grind away at the top of the ports. As ChuckN said that would change the timing and cause unforseen running problems. I ported an R/C car engine and it was much faster. You don't really need to enlarge the ports, in fact, I recommend that you don't even get to the inner surface. Any tiny burs that you don't polish perfectly smooth on the sleeve will score the piston and comprimise compression. Just smooth out any corners and polish all the rough spots.