Summary
Highlights
The video begins by addressing brake judder, specifically on a 2008 GSXR 1000. The first suggested fix is to check the bobbins on the fully floating front discs. If these bobbins seize, the disc cannot move as intended, causing judder. The presenter demonstrates a method using a bolt and nut to freely spin and clean each bobbin with brake cleaner, ensuring their proper movement.
Next, the video delves into proper front wheel alignment, suggesting that incorrectly aligned wheels or pinch bolts can cause tension and judder. Following advice from a Dave Moss video, the presenter demonstrates the correct sequence for tightening the axle and pinch bolts. This involves tightening the main axle bolt, then the pinch bolts on the captive side, bouncing the front end to allow the free leg to straighten, and finally tightening the pinch bolts on the free side.
The third trick involves centralizing the brake calipers. After noticing increased binding after the wheel alignment, the presenter inspects the brake pads and piston positions, finding uneven piston protrusion. They push the pistons back to spread them evenly. The method for caliper centralization involves loosely fitting the calipers, pumping the brake lever to bring the pads into contact with the discs, then, while holding the brake lever, tightening the caliper mounting bolts. This ensures the calipers are perfectly aligned to the discs.
Following the caliper centralization, the presenter bleeds the front brakes for better lever feel. As a final troubleshooting step, he checks the headstock bearings. Upon disassembling the top yoke, he discovers the top nut was only hand-tight, which he identifies as a significant potential cause for knocking and judder. He tightens the headstock lock nut and torques down the top nut, emphasizing the importance of proper torque settings. The video concludes by stating that one or a combination of these fixes successfully resolved the brake judder.