brand new yama 30cc ( HI GUYS) as far as im aware ive done everything needed to breakin the yama as should be after 20 or so minutes driving noticed a tinny sound and rattle then slowed right down then stopped it tried to move under gentle throttle wheels would turn when u lift backend off ground, took home on closer inspection noticed nothing missing or visually different but pushing forward bout a foot or so wheels go round 3/4 turn then other 1/4 would rub n grind, throttle works steering servos works but no drive , I think terminal and needs returning or am I completely wrong advice please much appreciated