Hello I have been looking around and cant seem to find what size chain and the links of chain that they use. a predator 90 2004 and a predator 50 2006
I also found that the chain tenener spring is broken this looks like it has been broken for some time is this common to just with out or do most keep this in operating condition. thanks for any help you can give me with this Dale.

 

428 chain on both. This is one for the 2004 90. 88 links.http://www.ebay.com/itm/Drive-chain-rear-scrambler-90-428-88L-polaris-0450695-/271391783216?pt=Motors_ATV_Parts_Accessories&hash=item3f3035f930&vxp=mtr
#0451796 is the part number on the 2006 Predator 50.Dirt Cheap Yamaha, Polaris, Suzuki & Kawasaki OEM Parts & Accessories – Cycle Parts Warehouse Doesn't show how many links,but most shops carry this 428 chain in 80-120 link packages that you can cut down yourself for about 15 bucks or less.
http://www.ebay.com/itm/RK-M428-Pitch-Motorcycle-ATV-Natural-Non-O-Ring-Chain-X-130-LINKS-/231455252557?hash=item35e3cee04d&vxp=mtr