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Author Topic: Front brake rotor CB750A versus GL1000  (Read 371 times)

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Offline jukku

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Front brake rotor CB750A versus GL1000
« on: January 02, 2020, 01:54:47 PM »
Front rim Comstar 1.85x19" on  CB750A -78 and GL1000 -78, calipers are different but are the rotors interchangeable? Diameter, offset, thickness?
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Offline bryanj

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Re: Front brake rotor CB750A versus GL1000
« Reply #1 on: January 02, 2020, 01:58:30 PM »
Check the part numbers at cmsnl
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Offline 754

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Re: Front brake rotor CB750A versus GL1000
« Reply #2 on: January 02, 2020, 03:43:07 PM »
More offset  smaller diameter on 75, 76 GL rotors so I suspect any GL may not swap.
« Last Edit: January 02, 2020, 06:13:55 PM by 754 »
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Offline Medyo Bastos

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Re: Front brake rotor CB750A versus GL1000
« Reply #3 on: January 02, 2020, 04:26:19 PM »
Year you’d have to run a gl front end yo make them work.  I have a box full of them under my bed.


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Offline Bankerdanny

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Re: Front brake rotor CB750A versus GL1000
« Reply #4 on: January 03, 2020, 12:10:55 PM »
The GL used calipers mounted directly to, and behind the fork leg. The '78 750A still used the pivoting bracket mounted caliper that all K model bikes had. So it is likely that the dish and diameter of the single disk 750A rotor is different than that of the twin disk GL.
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Current: '76 CB750F. Previous:  '75 CB550F, 2007 Yamaha Vino 125 Scooter, '75 Harley FXE Superglide, '77 GL1000, '77 CB550k, '68 Suzuki K10 80, '68 Yamaha YR2, '69 BMW R69S, '71 Honda SL175, '02 Royal Enfield Bullet 500, '89 Yamaha FJ1200
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