250-500cc Headlight beta

Will the stock stator on an 09 wr300 power a 55w H4 bulb?

I believe it will, not much more though.

The 09 250 and 300 have a 55w stator so you can calculate the amps
http://www.rapidtables.com/calc/electric/Watt_to_Amp_Calculator.htm

You won't achieve max output at idle and keep in mind that the ignition and other lights are drawing a couple of amps. I believe the stock headlight is 35 watts

Edit; I tried to look up the stator output in the manual and I couldn't find it. I remember being told 55 but not sure if that was amps or watts which is a big difference.

A 55 amp stator would have to be the size of a car alternator, so it's safe to assume it's watts.

Most car alternators put out over 100 amps. I would like to know what it actually is capable of. My stock headlight on my 09 wr250 would dim at idle and according to the manual only required 35 watts which at 14 volts is about 4 amps. The later model Ducati ignition is even less powerful.

Thanks guys. I broke the housing on my Polisport HMX dual led light. I was thinking of trying H4. Might just stick with the LED since they don't dim. Thanks

FYI 55 amps, to convert to watts multiply by volts
55 amps is 660 watts
55 watts divided by 12 volts would be 4.58 amps, what you would find on a dirt bike
i take power to make electricity, look up the KW-HP conversion