trx400 routine maintanence

[jakestrx400]

had the quad 2 years now...i serviced it last year and its due now...i want too know what should check...
valve clearences, tyre pressures, every nut and bolt. . is all i did last time..what shall i do this time..?
im going too do the same but want too get her running perfect :D
so, what else can i check?

[Bill Fuller]

All bearings. Remove swing arm pivot bolt and re-grease.Chain and sprockets.Brakes,check pads and make sure caliper "floats" properly.

[trx400EXtreme]

cant forget to clean the air filter.