MY SON`S BIG WHEEL 85cc KTM, HAS BEEN A GREAT BIKE WITH NO PROBLEMS, PISTON & RING CHANGE EVERY 3 MEETING`S, HAS HAD UPRATED PARTS FITTED AS IT WAS A RED BULL JUNIOR BIKE WHEN NEW, CAN BE SEEN ON YOU TUBE!, COMES WITH SPARE PLASTIC`S & A LOWER SEAT IF NEEDED.