just bought this kit with the 2 sprockets and gold chain for my 08 yz250f and the sprockets went right on and the chain looks great!! I haven't got to ride on it yet but I say that it will last as long as my vortex did.
The TALON CHAIN AND SPROCKET KIT - 520 includes one each of the following:
TALON FRONT SPROCKET:
All Talon gearbox sprockets are manufactured 'in-house' in the UK. Available in their standard design. These front sprockets are made from case hardened chromoly-steel, zinc coated and heat treated for long life.
TALON REAR SPROCKET:
All Talon rear sprockets are made 'in-house' in the UK. These sprockets are available in their standard design. They are made from aircraft specification aluminium and anodised in gold for stock.
DID CHAIN 520 DZ CHAIN: