Guide to repairing Shimano Ultegra 6700 10 speed RH shifter

Shows key steps for repairing common fault with 6700 RH levers where the spiral return spring for the release lever either breaks or loses tension. You can shorten the spring to restore its function and tension. This problem is experienced as the release lever (the small paddle) swinging freely and not actuating the gears (no shift).

I haven't included all the steps for dissembly and assembly, sorry. It takes too long. Key missing steps are:
1. Remove lever assembly - there's a circlip directly behind the inside of lever body where the lever axle is insterted. Once circlip is removed, push the axle out (it's ok to tap it with a bolt or drill bit).
2. Remove the rubber lever hood. Isopropyl alcohol and patience helps here. You can do it without the alcohol.
3. There's a plastic cover to remove to access the lever assembly. Simple.
4. Other stuff will probably fall out and springs become dislodged. Sorry there's no easy answer here - you'll need to work it out. These little mishaps are what take 90% of the time and effort.