Robert Hayes's primary bike

Air cooled, 123cc, Single, 2-stroke, Reed valve

Buy type: Used
Owned (from-to): March 2011
Power: 9.93 HP (7.3 kW) @ 6800 rpm
Category: Offroad
Tags: Enduro

Mods of this Yamaha DT 125 E

It looks like this biker didn't make any changes on his bike.

Robert Hayes's other bike

1978 Kawasaki - KE 175

Air cooled, 175cc, Single, 2-stroke, Rotary inlet valve