12A rotor weights (by lettering)
 

i searched, but didnt find any info for rebuilding purposes. I'm in the middle of a half BP rebuild, and i have a Rear rotor with a (B) weight, and a front rotor with a (C) weight. I know the motor i got the front out of was a high mileage motor and it was running with this exact set up, C on front and B on rear. Does this mean its ok to use in my rebuild??? it wont throw of the balance??? I thought i read somewhere about mixing C and D weights or that its ok as long as the difference is only 1 letter in sequence. Like dont mix an A with a C but an A with a B would be alright, is this the case???? Thanks guys,

I got the RE-DIY 13B rebuild video box set, and according to them, you are correct. You can use a B and a C or a C and a D, but not a B and a D. One letter difference is ok, according to the New Zealanders!

Rich

Yep, those are fine to use. I believe the spec is no more than two letters different between rotors.

great thanks for the info guys