Up for sale is SUNSTAR 1973-1977 KZ900 Z1 Kawasaki REAR SPROCKET STEEL 35T-630 KAW. The vendor part number is 2-641335. Please read the title to know what is for sale Manufactured using only the highest quality 1045 high-carbon steel and most are heat treated for added strength and wear resistance Computer designed weight reduction holes are included where possible Most are zinc plated and some have a baked-on durable paint process for corrosion resistance