2008 Suzuki LT-A400/F, LT-F400/F ATV Service Manual, Page 366Get this manual
4A-5 Brake Control System and Diagnosis:
ParkingRear Brake Light Switch Inspection
Inspect the parkingrear brake light switch in the following procedures: 1) Remove the left inner fenderRefer to "Exterior Parts Removal and Installation in Section 9D (Page 9D3)"2) Disconnect the parkingrear brake light switch coupler (1)
B827H24106005
Air Bleeding from Front Brake Fluid Circuit
Air trapped in the brake fluid circuit acts like cushion to absorb large proportion of the pressure developed by the master cylinder and thus interferes with the full braking performance of the brake caliperThe presence of air is indicated by "sponginess" of the brake lever and also by lack of braking forceConsidering the danger to which such trapped air exposes the machine and rider, it is essential that after remounting the brake and restoring the brake system to the normal condition, the brake fluid circuit be purged of air in the following manner:!
B827H24106009
CAUTION
Make sure that the vehicle is holded securely Handle brake fluid with care: the fluid reacts chemically with paint, plastic, rubber materials, etcI827H1410006-02