How To Fix Shimano Sora Shifters. PB blaster penetrating oil used in the video. 05-28-2013 0725 AM Pixelshot Wrote.

It is recommended to use genuine Shimano parts only. It was never damaged or misused. Shift through all of the gears to test the tension and make sure that the chain moves smoothly from gear to gear.
I did a full adjustment of the front derailleur but it didnt change anything.
Mounted on the handlebar the left side shifter controls the front brake and front gears while the right side shifter operates the rear brake and rear gears. If parts such as bolts and nuts become loose or damaged the bicycle may suddenly fall over which may cause serious injury. The thumb switch on the front shifter is VERY hard to use and she cant do it when shes riding. The RAPIDFIRE PLUS right shift lever allows riders to downshift three gears in one stroke and SHIMANOs OPTICAL GEAR DISPLAY shows riders what gear position is selected while riding.

