STI brifter question
I have a question about brifter shifting function? Not simply mounting and adjusting the shifting. More like making internal adjustment to the shifting mechanism. All of my bikes are older with downtube index shifters. I have ridden enough rental bikes with STI, but I’ve never worked on them. I bought a used bike a couple weeks ago (older Specialized Allez). It has 2x9 speed with Shimano 105 “Flight Deck” brifters. Mostly, the shifting works. But the rear (Right side) shifter has a bit of an issue. When I push the shifting lever to the LEFT to upshift (to a smaller gear), the lever moves freely, but once it engages I have to push rather hard for the final “click” for the shift. Much harder than on other bikes I’ve used with STI. I’m wondering if there is an adjustment internally that can correct that. — Dan