The "toaster tank," is a BMW motorcycle gas tank with chrome side panels introduced only in 1972.
The chrome paneled 4-1/2 gallon tank replaced the tall black 6-1/4 gallon tank. Chrome side panels or battery covers, with stripes painted black or blue came with the "toaster tank" machines. Some machines also had shock absorbers with aluminum top covers. The nickname "toaster" is in reference to the gas tank's resemblance to the toaster, a kitchen appliance. BMW: A Celebration, attributes the styling change to the appointment of Bob Lutz, the American automobile executive and motorcycle enthusiast, as BMW sales director.
The blank tank was standard in the USA only in 1970-71,
1972 had only the toaster tank, though some dealers replaced the chrome panels with rubber pads.
1973 had a choice of size, but none were chrome like the toaster tank.
The toaster! Chrome 18 liter tank, chrome side panels,
engine type on engine case in aluminium on black, straight exhaust
damper, extra colors: red, blue, green and curry. Also a new saddle
and new handrails.
Wider rearwheel rim, 2.15B-18 instead of 1.85
Changed crankshaft and bearing shells (stiffer crank).
Changed rocker shaft support brackets and hardened steel shims, because of the noise
Vaccuum ports on the CV carbs
21 August 1972
End of the toaster!