Sprocket 101 Octane with 68 teeth for drive chain 420 fits on geared mopeds Motorhispania Furia, Gilera Zulu, H @ k, Peugeot XP6. The sprocket with 68 teeth means shorter gearing than original. We recommend a 420 chain with 140 links for this sprocket, so that it can be shortened to the correct length. Mounting hole: 8.5 mm Inside diameter: 100 mm hole: 6 PCD: 115mm standard: 420 reduction: no teeth: 68