****rley, rounds for all...
My 'Passing lamps' burned out a while back, the local parts dealer only
had
35 watt apiece tractor lamps that would fit the lamp holder. The H-D
dealer
wanted an obscene amount of money for what amounts to a PAR36 lamp. These
together with the rest of the electrical load were too much load for the
18.5 amp alternator on my 1976 bike, it could not keep up, I could watch
the
battery voltage just drop. Don't want to burn out an alternator, so I
rarely used the passing lamps. Finely sourced some narrow spot 20 watt
PAR36 halogens and acquired them. Went to install and found that they
were
not quite thick enough to mount securely in the lamp holder. So I thought
about it for a short while (one beer). Fabricated and installed a
'rubber'
mount from a piece of clean fuel line, lined the inside edge of the lamp
holder and installed the lamp. Lamp is now securely mounted and resting on
a
'rubber' mount and maybe less susceptible to vibration too.