2003 Suzuki LT-Z400 Factory Service Manual, Page 30Get this manual
PERIODIC MAINTENANCE
,"", every monthsevery years" Check the brake hoses for If any damages are new onescracks, wear and damthe brake hoses with
3 monthsTIRE TREAD CONDITION the vehicle with worn tires will decrease stability and consequently invite dangerous situationIt Iy recommended to tire when the remaining of the tire tread reaches the specification
Service Limit Tire tread depth: Front 4.0 mm Rear 4.0 mm