XXX-CR, 5.5 Sintered, no brakes!

[Fiddybux]

Hi,

Just fitted it in my XXXCR with a 2007 Sphere and 5.5 sintered motor, and the brakes really suck. I like brakes, so for me this is no good.

It's geared on an 88 spur with 16 pinion (should be about right yeah??) on a 5.5 sintered X11 motor.

Slipper is tight enough.

I've checked the stupid stuff like the wheel nuts being tight enough and the wheels hex's not being rounded (I've had this problem before!).

Also I've checked that the tyres aren't skidding and just losing traction.

Any ideas?