I've been running these H4 style in my ST1300 for a few months and really like the light output. They may or may not fit the 1800's, but do offer other sizes at a much better price.
You may have to shop around. I got two lamps in April for $52.00, don't know why the price shot up...
They do show the H7s that fit the 1800s. I bought a similar kit for my 1800, much cheaper than the ones sold as for motorcycles.
With no God over the state, the state then becomes not the defender of liberty but the definer of liberty.
NRA endowment life member
Wild Rhino Arkansas chapter
2010 1800 pearl yellow
If I disagree with you it's simply because you're wrong.