Join Date: Jun 2012
Location: Southwest Chicago suburbs
The 1100s don't seem to have much of an aftermarket choice compared to the 750s, and the 600s are everyone's hands-down favorite to bob out so there's kits for them. With that said, you're going to have to do it the old fashioned way and cut/fit/make things work. You aren't going to find any kind of bolt on bobber kits for the 1100s.
You can find some universal parts like throttles, mini switches, seat pans/hinges/springs, etc. Trailer fenders are a go to for most dudes that run a rear fender but don't want to cut their stock ones. The intakes on the 1100s are pretty much a nightmare so you'll more than likely keep your stock tank and airbox set up.
1100s don't lend themselves that well to bobbing unless you want to go for a full on chop and put a decent amount of work into them, as opposed to the 600s that dudes can knock out in a weekend. Check out Chop Cult for a few ideas, but there aren't many 1100 chops there, and most guys go the sled route.
With all that said, there's not really a reason you can't do it. When you work on bikes, you get an idea, you find cool stuff, and you make it work.
'00 1100 Spirit with all sorts of stuff done to it