OK, so I have 105 (5700) shifters on 2 bikes. One shifts fine, the other like crap. Specifically, it is sluggish and features very high lever effort on the rear with moderately-high effort on the front. I am seeking advice on how to get bike #2 shifting at least as well as bike #1. Here's background:
Bike 1 - 57cm crappy Jamis touring bike, used for hauling stuff and pulling kid in a trailer. Aforementioned 5700 shifters with 105 (5700) FD, old-ass Shimano Deore RD (long cage). Cables are the Performance Bike house brand (Clark's), self-installed, of course. Shifts nicely with acceptable lever effort front and rear.
Bike 2 - Felt F15X cross frame, 5700 shifters with SRAM Force FD, 105 (5600) short cage RD. Cables are standard Shimano house brand SIS, brand new. Front shifting is OK, but still not as good as Bike #1, lever-effort, wise. This bike used to have a 105 FD and effort was about the same. Rear shifting is terrible, high effort, imprecise shits, very hard to get dialed in.
Obvious things I have tried and other notes:
1. Cable runs and routing very similar between bikes.
2. The parts from (badly-shifting) bike #2 used to be on another frame (crappy Jamis cross frame) and shifted just as bad or even worse, using standard-grade Jagwire cables (vs. current standard grade Shimano SIS cables).
3. The RD used to be on another bike and shifted really easily and accurately (with 7800 shifter).
4. I have a cheap carbon frame with full 7800, Yokozuna reaction cables and it shifts very well with low lever effort.
My next thought is to get another Yokozuna cable kit and try that. I hesitate, however, because my experience with Bike #1 tells me that 5700 can be made to work well with cheap, standard cables, so I hesitate to ruin a good cable set and end up with same crap setup.
Any advice welcome, even if it's just general 5700 setup tricks anyone cares to share.