Yamaha RX100 Exhaust Pipe + Nut Ring Bending Pipe RX135 RS100 RX125 RX 100 RXS This exhaust pipe is designed for Yamaha RX100, RX135, RS100, and RX125 street motorcycles. It comes with an adapter for easy mounting with a bolt-on style. The oval shape and chrome finish add a vintage touch to your bike. The exterior and interior diameter, as well as the outlet diameter, can be determined by referring to the listing pictures. The neck exhaust pipe is made of stainless steel and weighs 1kg. It is NOT universal fitment, except for some models, and is easy to replace.