6 volt battery system - normal voltage range when revving up - Motorcycle-Journal Forums

lakeplacidny · 07-18-2004, 08:06 PM

I have a 1970 TS250. It has a 6 volt system.

A guy ran my bike with a dead battery (it was dry) and this seems to have lead to burnt out headlight. I wonder if anything else should be checked.

I added a new well charged battery, and when running at idle (with no lights on (I removed and still have replaced the headlight) I get about 7.3 volts. But when I rev up the engine to about 6000 rpm I'll get up to 9-9.3 volts. This seems high to me, but I would like to confirm with others.

Questions:
1. WHat is the voltage range on your 6 volt system motorcycle at idle, engine revving (rpm?) without headlight and revving WITH headlight (lo) then (hi beam)?

2. What is a normal range?

3. Should I run other electrical tests with the volt / ohm / ahm meter? to make sure I don't blow the next headlight?

Thanks for your advice.

Bonus question on headlight 6V removable bulb:

4. On the TS250 in 1970, you had to replace the whole headlight assembly (6Volt / 25w lobeam / 25 hi beam), since the 6V25/25W bulb is soldered in, and the glass plate is crimped on. Also, this item is discontinued. In any case, I would rather replace the headlight to one where the bulb is removable. I looked at the Clymer book "Suzuki singles 1964-1981" and noticed that on page 79 the headlight has a removable bulb. Can any owners of a Suzuki single tell me if their bike has a 6 volt removable bulb in their headlight assembly? What is the wattage? This way I could order that assembly - tell me your model and year if it sounds like it could fit in my headlight bucket. My headlight is horseshoe shaped.