Handmade exhausts for Honda RS125 NF4 (1990 - 1994) models, are now available via my online store.
This pipe will fit 1987 - 1989 models ONLY if a 1990-1994 cylinder is used as the exhaust flange is different on earlier models. Later 1995-1997 cylinders can be used as well and will work great with this pipe.
an expansion chamber
a suitable exhaust flange
2 X exhaust springs (same dimensions as OEM)
An end can is not included but the stock one can be used or even better a later NX4 type as the rear mounting point for the end can is not used.
For more pictures of the expansion chamber, check out the below link.
Price is 220 Euro (worldwide posting costs included).