big bore kit installed on 50cc 2 stroke dirt bike

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syx moto holeshot engine upgrade from Goofit.
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Hi do you know if there's any noticeable increase in power? I seen on Amazon they Have an entire built engine with the big bore kit already on it but it only says 43 mm, I want to get it but I'm just hoping that the bike goes in already come stock with a 43 or 44 mm bore because it doesn't say on the specs what engine is on the stock SYX moto, So I kind of didn't want to waste my money unless there's a noticeable difference" What do you think?

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