I have recently bought an '01 1100 with 35000 kilometers on it.
The bike cranks up and runs fine, little backfire on the front cylinder when cold but that cleans up once it is warm, I think it's the gas (what's left in the tank is from last year)
So recently I checked the valves and adjusted them, when I first did them they were too tight. After I did the valves and did a compression test both front and back cylinders are well below factory minimum.
What could cause the sudden loss of compression? It hasn't been further then a couple rips around town.
I am boggled on how well it runs, it shouldn't be running that good with 110psi and 90psi compression.
I did the valves according to the repair manual for the bike.