On my '79, this is normal: 1157 dual-filament bulbs in the front, and 1156 single-filament lights in the rear. The bike is wired for dual-filament bulbs up front, and single filament bulbs in the back. The running lights, up front, are to help approaching cars recognize that you are a motorcycle. From the rear, this is less important. Anyway, it is normal.
If you are interested in increasing conspicuity of your bike, daytime, or nighttime, I would highly recommend a headlight modulator (daytime use only!), and a brakelight modulator (mine flashes five times, then on steady, until I let up on the brake; works day or night). There are no studies, scientific or otherwise, to show that headlight modulators make a difference, but if you ask those who have installed them, the answer is always a resounding recommendation to install one. The brakelight modulators can also be enhanced with additional, bright brakelight LED's (
Hyperlites), used beside your normal brakelight. Or you can add an additional strip of LED's as a secondary brakelight, like what you might see in the back window of a car. I mounted mine to the trunk tops, pretty much at eye level for car drivers following me.
Check e-Bay for all of the above. For the headlight modulators, JC Whitney sells one very inexpensive model: it does not technically comply with federal law (does not have a sensor, so you have to manually bypass it in low light conditions/nighttime, using a $4 toggle switch), but it works perfectly. They also sell a brakelight modulator: the set can be had for less than $40 each, plus S/H. I run with a set of both on two of my three bikes. Better to be seen than to be a statistic on a spreadsheet. Cheers!
http://www.jcwhitney.com/headlight-daytime-modulator/p2010075.jcwx?filterid=d8782y1979j3http://www.jcwhitney.com/stop-alert-brake-light-pulsator/p2010076.jcwx?filterid=d8782y1979j3
1979 CB750K (sold, 2012, but not forgotten)
1983 Kawasaki 440 LTD Belt Drive (sold, 2011)
1993 Kawasaki Voyager XII
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