Yeats
Yeats sidecars were built by Williamson-Page of 222 Brunswick St, Fitzroy, Victoria. 1919 and likely other years.
Patent: US1388387A Yeats John Albert. Patent application 1919. Patented Aug. 23, 1921
Source: ironindian.com.au
Yelroma 1915 (S.A.)
YZR
Manufactured by YZR Engineering Pty Ltd of Beresford Road, Lilydale, Victoria.
The company was established in 1994 by John Redding who began producing Yamaha-based four-stroke machines in 1998.
The YZR company ceased trading in 2013, and John Redding went on to head the Yamaha Superbike Racing Team in Australia. He also heads YRD which produces components for Yamaha competition machines including YZ125/250, the WR series, and the FX.
Sourced: asic.gov.au; Simon Fleming; mcnews.com.au; et al
Zeta S.A.
Rarer Australian Marques