I bought mine form MFG supply, 9600 lbs tensile strength, this is on my 2000 MAX II, aprox 40 hard hrs and no stretch so far...
MFG Supply
Nomenclature
5200-ring-102-w1-520 O-ring chain 102 pins $159.12
520O-CL-W1 - 520 O-Ring Motorcycle Chain Connecting Link 5 $19.95
530O-RING - 530 O-Ring ATV Chain. 182 pin 182 pin $89.18
530O-CL-W1 - 530 O-Ring Motorcycle Chain Connecting Lin $19.95