It looks like this cover could be a new old stock cover but not protected over the years

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2016 YZFR1 60TH ANNIVERSARY (YZFR1GCY) - Handle Switch Lever

KAWASAKI ZN1100 Rear R/H Engine Mounting Bracket 32029-1329 YAMAHA AT CS CT DS DT HT LT MX R5 RD RS RT SC TX TY TZ XS YT YZ Clutch Lever 1J3-83912-10 / 214-83912-00 / 583-83912-10 It looks like this coverKAWASAKI ZN1100 Rear R H Engine Mounting Bracket OEM Ref. # 32029 1329 NOS New Old Stock. MB17 A Fits ZN1100 B1 84 1100 1100 LTD SHAFT LTD STREET ZN1100 B1L 84 1100 1100 LTD SHAFT (CAL) LTD STREET ZN1100 B2 85 1100 1100 LTD SHAFT LTD STREET ZN1100 B2L 85 1100 1100 LTD SHAFT (CAL) LTD STREET