LURKING.........
LURKING......
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POUNCE!!!!!!!!!!
Yes a 520 chain conversion will make a big difference, the weight savings of the chain (and usually the sprockets too if you buy good ones) makes the engine have to use less power to accelerate the rear wheel.
If youre doing the swap (you gotta swap sprockets to go to a 520 chain) consider a little gearing change. Even adding a tooth to the rear sprocket will give you a little extra oomph in the low end.
Mine is 520 chain/15 tooth front (one down)/50 tooth rear (two up), and Im here to tell ya it makes it a whole new bike!!