I just finished overhauling my GL1100 Carbs from my 82 Aspencade. Pulled it off without any problems. The Honda service manual is O.K., but it not all inclusive. Here are a couple of pointers I learned:
1. DONOT reuse any rubber o-rings or gaskets! Spend the money for the Honda OEM gasket kit ($35 per carb). Got mine from powersportpro.com. Comes with every gasket and o-ring, even carb to plenum O-rings, plus carb cap gasket. Carb rebuild kits don't usually come with these. All my gaskets were hard as rocks. Don't forget to order new intake manifold o-rings (saber cycle has a set).
2. Order 4 air cut-off valves now. Mine were all rotted out from age. These are available on e-bay cheaper. Get an accelerator pump from the #3 carb also.
3. My carbswerevery dirty. Covered with varvish...butterfly valves were gummed up.I soaked them all overnight in parts cleaner, but had to use many cans of carb cleaner spray to get the varnish off. Use enormous amounts of high pressure airon all passages.
4. Organization isthe key. I set up a table in the garage and layed everything out. I used cups for the small parts. Obviously donot mixup any parts with other carbs.
5. If you remove the carbs from the air plenum (I did because it's easier to clean the carbs)be very carefull the aluminum pipe setsbetween thecarbs. They break very easily. I know because mine broke and they are discontinued with Honda.
6. If your carbswhere well synched before, donot mess with the butterfly valve adjustments. When I hooked mine back upI didn't have to adjust anything.
7. If you are not replacing the pilot valves, be sure to count the number of turns they wereset at before you remove them. This will save you having to readjust them later. Don't forget to remove the little rubber o-rings which will be mashed into the pilot valve holes. I had to pick mine out with a small nail. Be careful not to damage the hole.
That's all I can think of now. Good Luck, hope thishelps.