I have a 1991 model RX-100 of my own. Excellent bike, raw power and fun to drive. However this is a two stroke engine. World is worried about smoke emissions and hence government legislation has ensured that nobody can manufacture two stroke engines anymore. Your only option is to buy a pre 1991 bike and restore it. It might cost you almost like a new bike and take up to 6 months or more.Yamaha knows the public loves the RX monicker but is helpless. However you shall be pleased to know that sometime ago they made a small and compact motorcycle just about the size of the original and they put in a four-stroke 100cc motor and named it RX- Saluto 100cc. This bike is perfectly street legal to sell and any Yamaha dealer can procure this for you.
...Read More