Subframe modification or replacement

[HAWK]

In the rule book under the superbike section it is stated that the frame must be from a production street motorcycle. Does this mean that I cannot make my own subframe?

[Eric Kelcher]

The main frame must be from a street legal motorccycle.
Similar to Clip-ons and foot pegs the subframe can be modified, changed, swapped, aftermmarket replacement etc

[HAWK]

Thanks Eric