Someone posted a pretty nice site a while back with a nice howto on rejetting a Keihin similar to the ones that come stock on the Thruxtons.
I've searched but haven't been able to find it here, only finding this french one,
http://jeepgarage.free.fr/prepacarbu.html.
If anyone knows the site I'm talking about, could they post it again. I'm going to be rejetting my carbs and could use all the visual aid I can get
Thanks,
Marshall