Interesting experiment is to put a voltmeter between your bulb & the battery. The resistance of the wire, ignitions switch, dip switch etc causes a volt drop that loses energy. My RF for example with a std bulb loses 1.3V. A relay here will restore lost energy. If I put a bigger bulb in it would be more of a difference.
As for the FXR150, they have a different plug in the back, similar to a tail light. Also they have plastic lamp shells that may not take too much heat from a large bulb & chances are the alternator would have trouble driving it at any rate.
However it is worth checking what type of bulb you have. Yamaha Blasters (horrible quad thing) have a 35W Halogen bulb that will work just fine in the FXR headlight if they are not already fitted. Pull the bulb & check if it is pointy at the tip. If it is round like a normal bulb then the pointy at the tip Halogen will be an improvement. I’m running a couple in my FXR headlights (not fitted to an FXR though).
Don't you look at my accountant.
He's the only one I've got.
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