I recall a friend telling me on his R* providing the battery & charging system are operating are operating at 100%, you can safely use about 90 watts without getting the charging system into a discharge state. For example, a pair of 35 watt passing lamps(70 watts) will operate in the system continuously with no issues for any length of time................but run a set of 55 watt passing lamps, and the battery will drain down after riding about four hours or so.
a gauge to monitor drainage would be a good thing to have if your close to the edge..
My Stratoliner is 450watts output, the new V-Star 1300 is running 460 watts and the new bigger engine Harleys are 486w, all still fairly anemic, don"t be running big advertisement signs on the back of your bike for long or you may not get home ! lol

To do calculations this helps .

http://www.jobsite-generators.com/power_calculators.html<br><br>Post edited by: Motostar, at: 2007/02/08 07:44