The TVS Apache RTR 180 can ride smoothly at 100 kmph and it is not the nature of Apache as it is a reliable machine. The reason for the same can be excessive air in the front wheel, which makes the tyre more inflated than required, which results in lesser traction. If this is not the error, you can check your wheel for certain damage, which inturn effects the rotation of the wheel. If the tyre is all correct you should check whether the screws tightening the handlebar are tightened and the seals holding the handlebar are fixed. At last you should check whether both the telescopic forks are filled with equal oil as leaking of the oil from one side effects the stability of the bike.