Topic: CB550 Brake rotors

[MikeG]

Not sure if this is the correct place to post this question but here goes anyway. I'm using the front wheel off a 74(?) CB550 in a project bike I'm building. It's not a Honda so my knowledge of thes bikes pretty limited. The wheel is going into a 84 Kawasaki GPZ750 fork, it's almost a drop in fit except for the rotors. Since the CB550 had a single disc from the factory the rotor is much thicker than the twin discs used on the Kawi. Does anybody make a floating rotor conversion for the Honda carriers, or a complete rotor? When Honda went to twin discs did they make them thinner than the single?
Any and all info greatly appreciated!
MIkeG

[754]

Honda 750F 77/78 used a small twin rotor setup. Thin discs with 5 hole pattern, not sure if they are smaller than 550.

Is the 550 disc same dia as Kawi, or smaller?

[MikeG]

Same diameter, 270mm. Thats one of the reasons I want to use this wheel. The fork is going into a much older bike and I needed something with spoked wheels, but anything I found with twin disc was cast. Thanks for the info, I'll check whats available for the 750F.
MikeG

[bryanj]

750F discs will not fit 550 wheel as 750F2/3 was 5 bolt and 550 6 bolt same as the 750K. To the best of my knowledge there was no thinner disc with the correct bolt pattern to fit the wheel you got

[MikeG]

So I've been finding out I guess another option would be to have them surface ground to the needed thickness. Any idea if its possible to successfully detach the rotor from the carrier and reattach it?

[bryanj]

Drill the heads off the rivets and use HT bolts with nylock nuts to re-attach. Years ago a UK firm made cast iron rotors and thats what they were supplied with

[HawaiiMike]

Dynoman has a rotor that's worth a look.  Don't know the dimensions, you'd need to check with them: http://www.dynoman.net/brakes/ebc-apps.html