Gen 1 rotor covers

[RAECOREP]

Hello everyone,

I purchased a used set of rotor covers on line. I believe they are from an 84'. Will MKI rotor covers fit 90' MKII? I have slipped them in postion but cannot figure out the little lip/flange under the caliper.

The axle bolt slipped right in and It looks like The little lip on cover could be removed if not really needed. Also, I read in an older thread that a spacer needs to be cut down to allow for thickness of covers to get calipers to line up correctly, if this is true do I account for both covers?

Any close up pics and experience would really help!

Thanks! Robin, "RAECOREP"

[Prairiehammer]

I have never actually tried to interchange the MKI covers with MKII covers, so I am not positive on this point:

the rotor diameter is different; the MKII is 282mm and the MKI is 298mm. Obviously if you have MKI (larger) rotor covers, then perhaps that is not an issue when installing the covers on the MKII.

More to the point of your endeavor though, is the size and shape of the brake caliper. The MKII caliper is larger than the MKI caliper and I would assume the cut-out for the caliper on the MKI rotor cover would be too small and the wrong shape.

As for the lip you mentioned, I believe that you are talking about the little 90° angle at the lower portion of the caliper cut-out? That 'lip' is to prevent the rotor cover from rotating about the axis of the axle. Without it, I would worry about the rotor cover spinning into the caliper or forks, perhaps causing damage.

[Condor]

I'm not sure about the '85, but the '83 and '84 are a different animals. The MKI's have center cooling and are a thicker rotor, while the MKII's have a solid center. I'm not totally sure how this might effect the covers fitting properly, but it might have something to do with it???

[bongobobny]

There is also a spacer required on the axle for proper spacing both models...

[Venturous Randy]

The hole to hole spacing is also different.

RandyA