Rev ranges for honda melody

[kirch93]

Im building a tuned pipe for my 84 honda melody and I need to know my target power and target RPM. I have been trying to find out exactly what engine this is but I cant find it. I think It is similar to the ns50 or nq50. Any Ideas on what sort of numbers I should use? What do people usually aim for in terms of rev range for max power? Cheers.