Problem is... They are not rectified, so its AC voltage to the lights that has a simple regulator so it doesn't go to high for the bulbs and blow them out.
If you wanted to do this... The easiest way depending on your electrical skills, would be to wire up a rectifier, you can get a universal atv unit off eBay for cheap, then you take the DC output of that rectifier to a small battery, the rectifier gives you DC voltage to charge the battery and you have a DC source for a cigarette lighter outlet. You could use it without a battery but your voltage would be up and down some with engine speed and might not be enough to run the air pump at idle.
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1984 Honda ATC200ES "Big Red"
1982 ATC200E "Hondie"
1988 TRX300FW "Project Quad" Still in progress....