http://www.ebay.co.uk/itm/1974-YAMAHA-TY250-DT400-TRIALS-ENDURO-EVO-TWINSHOCK-/221153572766?pt=UK_Motorcycles&hash=item337dc7b79e
K6 DRZ 400sm
Thats coz its a trials bike thats what they had to do back in the day make most of the power for bottom end