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All Talon gearbox sprockets are made, in the UK, from case hardened chromoly-steel. They are then zinc coated and heat treated for long life. This gearbox sprocket is for all GasGas models from 2002 onwards. Pick your required number of teeth below. Use 9 teeth for 125s, 11 for 250s 280s and 300s, use 10 teeth if you want to slow your gearing down.