Chain Adjustment

[dlunt]

Sorry to keep bringing issues up about the chain but I am confused.

The new Dual Sport Prep page http://www.chinariders.net/modules.p...showpage&pid=6
Says:

When prepped for shipping (i.e. crated) the chain is setup extremely tight. Loosen the chain to allow for a couple of inches of slack with the rider mounted..

The manual for LF200GY-5 says that for the chain to be in adjustment it should have 10mm - 20mm play at the bottom of the chain while on a center stand.
This is a Big difference.
20 mm is about 3/4 ".
2" is 50mm.

Which is right? If I try to keep mine at the 10-20mm range it always ends up in the 1.5" - 2' range within 2 rides. If I leave it at this larger amount of play it seems to stay there for 5 or 6 rides before an adjustment is needed.
The larger play does seem to rub on some of the rubber pieces on the frame though.

Can one, or more, of you mechanical genious' with years of experience tell me if my owners book has a mis-translation with the 10mm - 20mm freeplay on the chain.

Oh thank you great and knowledgeable ones!