Brake system troubleshooting guide
| Troubles | Causes | Comments | PArts | Brand new | Used | Send back | Buy repair kit | Replace |
|---|---|---|---|---|---|---|---|---|
| Front wheel not free | Caliper misalignment | Use spacing washers from the kit | Caliper | O | ||||
| Caliper misalignment | Check the front fork alignment (After crash) | Caliper | O | |||||
| Stuck piston | Unknown reason | Caliper | O | O | O | |||
| Stuck piston | Brake cleaner/Oil on the caliper or wrong brake fluid | Caliper | O | O | O | |||
| Bent pads or worn | Replace the pads | Pads | ||||||
| Master cylinder closed | Check the lever is in the intial position (check hand gard) or the brake light switch thightened too deep | Master cylinder | ||||||
| Master cylinder closed | Seals dammaged because wrong brake fluid | Master cylinder | O | O | O | |||
| Too much brake fluid in the reservoir | Remove some brake fluid | Master cylinder | ||||||
| Impossible to bleed | Master cylinder closed | Check the lever is in the intial position (check hand gard) or the brake light switch (thightened too deep) | Master cylinder | |||||
| Master cylinder closed | Seals dammaged because wrong brake fluid | Master cylinder | O | O | O | |||
| Master cylinder closed | Check the front fork alignment (after crash) | Master cylinder | O | O | O | |||
| Lost pressure | Internal leackage | Master cylinder scratched inside | Master cylinder | O | O | |||
| Internal leackage | Primary or secondary cup dammaged | Master cylinder | O | O | O | |||
| Soft lever | Air in the brake line | Bleed | Complete system | O | O | |||
| Wrong size of master cylinder | Choose the size up | Master cylinder | O | O | O | |||
| Caliper misalignment | Check the front fork alignment (after crash) | Master cylinder | ||||||
| Hard lever | Wrong size of master cylinder | Choose the size down | Master cylinder | O | O | O | ||
| Too much brake fluid in the reservoir | Remove some brake fluid | Master cylinder | O | O | ||||
| Master cylinder closed | Check the lever is in the intial position (check hand gard) or the brake light switch thightened too deep | Master cylinder | O | O | ||||
| Master cylinder closed | Seals dammaged because wrong brake fluid | Master cylinder | O | O | O | |||
| Lost pressure or/ and brake fluid | External leackage | Master cylinder scratched inside | Master cylinder | O | O | |||
| External leackage | Primary or secondary cup dammaged | Master cylinder | O | O | O | |||
| External leackage | Copper washers dammaged | Copper washers | O | O | ||||
| External leackage | Leacky hose | Hose | O | O | ||||
| External leackage | Brake cleaner/Oil on the caliper or wrong brake fluid | Caliper | O | O | O | |||
| External leackage | Unknown reason | Caliper | O | O | O |