Gday All Got a 110cc semi auto quad for the kids about a week ago set it up changed the oil and tightened everything , so far its done maybe 2hrs running time with the throttle restricter wound a fair way in for the kids but it has developed a rattle or knock when you accelerate and the centi clutch takes up sounds like a big end to me but not familiar with these chinese motor/ gearbox set ups anyone had a similar issue ? any comments would be appreciated