Question 1

Has anyone tried this bulb on an BMW G650GS?  I am a bit concerned it might fry the wires, reflector or lens.

Accepted Answer

You MUST use 12g stranded wire with quality insulation to each h4 socket terminal.  You MUST use Ceramic High Heat HD socket.  You Must usea relay that is 20% Higher rated than the max amp draw.  Your altenator or generator must have the added capacity so to cover the increased draw@ idle of these lamps or they will draw down the battery.  If smaller wire or alt capacity there will be voltage drop which increases amp and thus heat.  For 1 light on a bike figure for 13.5v to be safe which adds to 9.6 amps.  Use a 15 amp relay.  For high low you need 2 relays use two 15a or 1 15a hi and 1 10a lo.  If its 2 for a dual lamp or 4wheel vehicle double Watt   so 260w÷13.5=17a.  Best use 25 or 30a relay for high and low.  Ideally use a dual output relay so 1 12g lead to each bulb from  relay term not daisy chained.  Ideally run 10g from battery or alt post to relay input.  Built like this you will never have a capacity or heat issue when in good condition.

YOU CAN NOT USE ANY STOCK WIRING HARNESS!!  NOT EVEN MOST PREBUILT HD WIRING HARNESS.

If you follow the above general guide with properly crimped connectors it will not only not burn up but 2
Will have much higher light output.  Remember a 5% drop in voltage = a 15% drop in light output 1:3 ratio. Ideal voltage is 14.5V on 12v systems.

Question 2

I have an original stock headlight.  Anything special i need to do to use this bulb?

Accepted Answer

The current draw with this bulb is more than stock so after having the lights on for say a 30 minute drive in warm weather see if the connector at the bulb is hot as well as the wires going to it with the lights still on if so you should install a hevi-duty  connector and wire kit. My jeep 2005 wrangler handled these bulbs just fine and I think most vehicles will need nothing.....DBW

Question 3

I have a 1998 Kawasaki Vulcan 800 Classic. Any need to upgrade anything electrical or does this simply replace the stock bulb? Thanks

Accepted Answer

Oh yeah. You should not just plug this in and go. These bulbs make a ton more heat than a stock 55/60 bulb. Buy a ceramic plug as well, otherwise the stock pug will just melt over time. I think I paid maybe 12 bucks for 2 ceramic H4 plugs on Amazon.

Question 4

Will these work on my motorcycle? it's a 2004 bmw r1150r, and h4 is stamped on the glass plate of the light housing

Accepted Answer

The h4 bulb will fit, May want to check the wattage they get kind of hot. There is a lower watt bulb too I believe.

ASIN	B01FXS2UO2
Auto Part Position	Rear
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	133,584 in Automotive ( See Top 100 in Automotive ) 449 in Special Car Bulbs
Brand Name	HELLA
Color Temperature	6000 Kelvin
Colour	Multi
Customer Reviews	4.5 4.5 out of 5 stars (62)
Fit Type	Vehicle Specific Fit
Global Trade Identification Number	00760687150701
Included Components	Bulb
Item Type Name	Halogen Bulb Long Life/Off Road/Heavy Duty
Light Source Type	LED
Manufacturer	HELLA
Manufacturer Part Number	HELAH424V10090W
Manufacturer Warranty Description	1 Year Limited
Model Number	H4 24V HD
Number of Items	1
Number of Packs	1
OEM Equivalent Part Number	H4 24V HD
Operating Life	50000 Hours
Package Quantity	1
Part Interchange Info	replacement
Specific Uses For Product	Indicator Light, Interior Light, Lamp, Multi-Purpose Light
UPC	760687150701
Unit Count	1.0 count
Voltage	24 Volts
Wattage	70 watts

Hella H4 24V HD Heavy Duty Bulb, 75/70W

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