Hey guys,

I have an MC21 that has been slightly changed over the years by previous owners and myself. I need some advice with a set up issue.

Firstly, fitted to the bike are '95 ZXR750 forks/triples, running the standard front wheel. The rear is an SP shock with standard SP (red) spring. I have done no valving/rebuilding work, though that is the plan when money permits.

The issue I have is that I believe the front forks as they MAY sit the front end up too high. When static the bike appears to be balanced front and rear, but when loaded and moving it looks (from pictures) like the rear sits too low/or the front is too tall. What I want to determine is whether it is more likely that I have a rear spring issue, or are my forks positioned incorrectly from the get go?

- Forks/triples are 1991-4 ZX7R. They are sitting about 6mm out of the top clamp.
- Rear definately does sag with a rider more than i would like.

Is there some form of basic geometry settings that I can apply to the bike to get a good starting point?

What is the length of the standard 21 forks? If they are longer than the ZXR ones that would indicate the problem is with the rear, yes?


Also, what rear spring options do i have available to harden it up? I hear HRC ones are available, but where do you get them? What about K-Tech?