Dual beam from a H1?

Question

Recently killed my old headlight (Single H4) when it came loose and melted the housing...

So I bought this until I find something I like more:

https://www.ebay.com.au/itm/Street-Fighter-Motorcycle-H1-Headlight-Headlamp-With-35-54mm-Fork-Tube-Bracket/282812235522?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

It claims Dual Beam. I thought it was odd but I can get it to dim two of the bulbs as low but then only one works on High. Works fine with one bulb as high and one as low, but I'd like both!

Wiring on the old bike is just the 3 wires and it's a 2005 BMW K1200s streetfighter.

Any help would be swell,
Joh

user4321 · Answer

If either can go high at anytime while the other remaining low I would imagine that your bike can't provide enough current to the bulbs to put them in the same state. Do you know the max wattage of the single H4 vs the dual H1's?

Answered by user4321 on August 18, 2020

coner · Answer

The problem is H4 is three pole bulb. So in the socket there is three holes. If the product in this website has corresponding plug to the socket in the motor, it will work I guess.

Does the socket in the motor look like that?

Old_Fossil · Answer

The H1 bulb is a single filament headlight. Low beam @ 55W). The H4 is a dual filament headlight configuration. Low beam @ 55W, High beam @ 65W. The base on each bulb is the ground connection. Each terminal connects to a filament on the bulb. These are the power connections(+) and are switched independantly. In a two light system it is not wired for high beam and low beam at the the same time. The light pattern of the beams are different. One is a symetrical beam pattern and the other one is a asymetrical pattern. I believe that having both beams operating at the same time would not be legal.

Answered by Old_Fossil on August 18, 2020

Dual beam from a H1?

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