More points to be made about increasing the length of the rear suspension;

When we were first putting our MZ race bike together at uni, i went straight down the route of dropping the forks through the yokes and increasing rear ride because i knew these mods would;

Reduce wheel base
Steepen the head angle
Reduce trail

All in the name of quickening steering becuase i'd read in magazines that that is what the top race teams do to their bikes.

The bike shook it bars from side to side when going over bumps and felt a little unpredictable when going from upright to leant over in a corner. It also picked its back wheel off the floor very easily when on the brakes and pitched forwards and back too much when going from brakes to neutral throttle to wide open throttle whilst leaning over which made it harder to judge lines through fast corners with sudden direction changes like Surtees at Brands Indy circuit.

I ended up using shortened rear shocks to drop the rear ride height back down and concentrated on lowering C of G to stop it pitching forward and back so much and also to calm the steering down for better stability.

The moral of the story was that quickening the steering on a bike which weighed in at about 100kg was abit needless as it was already so light that it took no effort at all to change direction fast. It was just a case of making it as rideable and predictable as possible to maximise rider confidence because therein lay the biggest improvement in laptimes. This was only club level racing afterall.
_________________
After years of moaning about immigrants now i am one...