What happens to the motorcycle if the rear tire goes flat?

When the rear tire of a motorcycle goes flat, the most notable effect is the loss of stability in the back end of the bike. This can cause the back of the motorcycle to jerk from side to side, which is a direct result of the uneven distribution of weight and the imbalance created by the flat tire. The motorcycle is designed to maintain its balance and stability when both tires are properly inflated; a flat rear tire disrupts this equilibrium, leading to a swaying or jerking motion.

Other answers might describe situations that could occur as a motorcycle becomes harder to control, but the immediate and defining characteristic of a flat rear tire is the jerky side-to-side motion. This instability makes it crucial for riders to address tire maintenance regularly and understand the warning signs of a flat tire to ensure safety on the road.