Right i contacted Cml today.
They are aware that motors such as the 5.5 / 6.5 etc all use the older design of rotor. They told me that it is affected by heat and that the brakes are not good. They simply go off with use and too much heat.
As mentioned they do a replacement rotor for a rrp of around £24.99 that updates the rotor to the sintered design. As mentioned this will solve any problems and will also allow the motor to run cooler. The new design has been approved by the brca - however this isnt going to be legalised until april!!!
I have mine on order and with any luck shall have it for trial this weekend at southport.
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