Check out any of the forty-six Handle Lever/switch/cable components enlisted.
The most reasonably priced component used on the Trx420fm Fourtrax 2010 (a) European Direct Sales Type 2 4wd Handle Lever/switch/cable is the Nut,hex.,6mm.
Some items from this specific schematic: Dust Seal 9x16x5, Cable Comp,throt, Screw,cross 4x16, Spg,pkg.brk.lever.