i've found the o-ring chains do not last me any longer than non o-ring, 1 season and done, so i save a little $ and get non o-ring, and save a few HP's in the process...yes, o-ring chains rob power.
the ebay link listed above to the blue chain, not sure if color matters, LOL, but i snapped 2 red ones last season,
1 o-ring with about 4 rides on it, and 1 brand new non o-ring didn't make it a 1/2 mile out.
$75 down the drain.
although i ran a green one on my stockish black blaster for 2 seasons
here's what i run now on my white sig blaster....
http://www.ebay.com/itm/JT-Sprockets-and-Gold-Chain-Set-Kit-Yamaha-Blaster-200-88-06-/181084034550?pt=Motors_ATV_Parts_Accessories&hash=item2a297315f6&vxp=mtr
it's the only set i could find that comes with a full 120 link chain/blaster sprockets and allows me to cut it to length for my +2 swinger or any spocket combo i want
D.I.D, EK, RK, Primary Drive, Renthal, Western Powersports all make good quality chains.
buy a name brand
if it's only offered in stock length, and you want to run 14/40 gearing, or up to a +4 swinger, you can also buy a chain (not sprockets) for a banshee and cut to fit your needs.