It looks like grubee is planning on making their own 4-stroke in the future. Here is a link to a page on grubee's website. Scroll all the way to the bottom and check it out. It is hard to tell what the design looks like because the picture is so small. I'd like to see some DOHC action and ports that don't make a 90 degree angle, but I highly doubt it...my eyes hurt from trying to tell what it is. Interesting if anything...
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