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Vintage Brake is a good reference but remember that he is dealing mostly with racers who are using their brakes differently than we do normally.
 

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Just wanted to put it out there that I received awesome customer service from HEL USA, specifically Jim! I wasn't quite sure about the best fitting at the MC for internal sealing & optimal routing on new SS brake line. They kindly requested photos and gave recommendations with great communication back & forth multiple times this week, built right after confirmation and shipped it immediately! Great price too with fittings, highly recommend HEL!


Tapatalk iPhone
 

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Reviving old topic, but same questions more or less. Found seemingly conflicting info within this thread & between others (if I'm understanding parts lists correctly and other's successes/failures with interchangeability)... Here are current parts for my prospective setup, but I think other folks could benefit from additional clarification too:

79 CM400T forks (mounting points)
78 CB400TII wheel
79 CM400T rotor

Which caliper is needed? (red or blue-highlights not showing in Tapatalk)
[attachment=4:3qerb4yy]image.jpg[/attachment:3qerb4yy][attachment=2:3qerb4yy]image.jpg[/attachment:3qerb4yy]
45101-MA5-771
1982 CB450SC
1982 CB450T
1982 CB650
1982 CB750C
1982 CB750K
1982 CB750SC
1982 CM450A
1982 CM450C
1983 CB450SC
1983 CB750SC
1983 CM450A
1983 VT750C
1984 VT700C
1985 CB450SC
1985 VT700C


[attachment=1:3qerb4yy]image.jpg[/attachment:3qerb4yy][attachment=0:3qerb4yy]image.jpg[/attachment:3qerb4yy][attachment=3:3qerb4yy]image.jpg[/attachment:3qerb4yy]
45101-MA3-006
1981 CB400T
1981 CB750F
1981 CB900F
1981 CM400C
1981 GL500
1981 GL500I
1982 CB650
1982 CB750C
1982 CB750F
1982 CB750K
1982 CB750SC
1982 CB900C
1982 CB900F
1982 CM450A
1982 CM450C
1982 CX500C
1982 CX500TC
1982 FT500
1982 GL1100
1982 GL1100A
1982 GL1100I
1982 GL500
1982 GL500I
1982 VF750C
1982 VF750S
1983 CB1000C
1983 CB1100F
1983 CB650SC
1983 CB750SC
1983 FT500
1983 GL650
1983 GL650I
1983 VF750C
1983 VF750S
1984 CB650SC
1984 VF700C
1984 VF700S
1985 CB650SC
1985 VF700C
1985 VF700S
1985 VF700S
1985 VT1100C
1986 CB450SC
1986 CMX450C
1986 VF700C
1986 VT1100C
1987 CMX450C

Just use the mounting bracket from the current single pot caliper (correct hole spacing) or need a specific one from the lists above?

Rotor swap needed too?
It's been years since you posted this. I am hoping that you see this message. I need to replace my sons 1981 Honda CM400C front dual piston brake caliper. Which calipers that you listed will fit? Greatly appreciated.
 

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When I had my 81 CM400C which had a dual piston caliper from the factory, I used the 11mm master cylinder and stock rubber brake line from a 91-03 CB750 Nighthawk. The line was a little longer than stock. I was running Daytona bars with 30mm risers, and it was a good fit.

I'm not entirely sure if the caliper and bracket from the 750 Nighthawk will bolt right on to a CM, I never tried.
 
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