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    • Active 1990 Yamaha RT180
      • Drive Type: Chain
      • Front Tire Size: 80/100-21
      • Rear Tire Size: 4.10-18
      • Spark Plug: B8ES
      • Chain Size: 428
      • Chain Links: 122
      • Front Sprocket/Pulley Teeth: 14
      • Rear Sprocket/Pulley Teeth: 51
      For reference only, please consult your owner’s manual to confirm your sizes