![](https://www.nzsbk.co.nz/wp-content/uploads/2017/06/m-protwins-128x128.jpg)
This class of motorcycle requires an MNZ Homologation with a minimum of 10 units sold of that model per year. Only minor modifications are permitted to these twin cylinder, 4-stroke, up to 660cc machines. The most popular model has been the Suzuki SV650 V-twin but the class also includes the Kawasaki ER650 parallel twin and Aprilia SV550.