While riding in sand or on ice/snow, it is always the front tucking on my Virago. It drops without warning (that I can sense) and the handlebars/wheel will turn pretty hard and very rapidly into the turn, with the bike falling on its side. So far I have managed to keep it upright by kicking the bike up with my leg, but it has been very close a few times. It seems to often be initiated by acceleration, even gentle acceleration, especially when the road is slick. Trying to gas myself out of it, when the slide is moderate, and it tends to get worse. So my question is; could this be a trait of a lousy bike, a poor tyre or a terrible rider? Or perhaps all of the above? Is there anything sensible I could practice to reduce the tendency for the front to fold? On gravel I have no issues and can control the trajectory by spinning the rear wheel.