Since we are all bored. I thought I would share my last stupid karting mistake, which took 2 hours figure out. Thank god, it was just practice. Been racing karts for over 20 years, so you’d think I’d know it all.
The brakes would severely drag after a several laps on the track. I would bleed the rear calipers and/or the master cylinder and push back the pucks and all was fine, until I ran a few laps and the brakes would start to drag again. This went on for several sessions when I observed the brake pedal travel was almost non-existent each time, hmmm. At that time I put the problem on a bad master cylinder and was ready pack it up and go home but it just didn’t smell right. In 20 years of racing I’ve never had a master cylinder nor brake caliper fail. So I took one final attempt to troubleshoot the problem and looked elsewhere for the problem and discovered that the jam nut on the brake pedal rest stop bolt was loose and the stop bolt would vibrate out (get longer) and start to apply more brake.