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Author Topic: Twin Piston Brake Upgrade Using OEM parts For CB750F  (Read 35616 times)

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Offline scottly

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Re: Twin Piston Brake Upgrade Using OEM parts For CB750F
« Reply #125 on: May 25, 2017, 11:28:32 pm »
OK. The calipers can be spaced inward by about 1/8" each side to line up with the K rotors and hub. If the F2/3 rotors were narrower than the K, it wouldn't work, since the calipers bolt against the inside of the fork leg, and can't be moved outwards.
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Offline seanbarney41

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Re: Twin Piston Brake Upgrade Using OEM parts For CB750F
« Reply #126 on: May 25, 2017, 11:34:40 pm »
don't forget about spoke clearance...no idea if this will be an issue or not
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Offline scottly

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Re: Twin Piston Brake Upgrade Using OEM parts For CB750F
« Reply #127 on: May 25, 2017, 11:43:13 pm »
Spoke clearance isn't an issue with the spoke wheel or the Morris; I've already checked for worst case. ;D
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Offline scottly

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Re: Twin Piston Brake Upgrade Using OEM parts For CB750F
« Reply #128 on: September 19, 2017, 07:52:21 pm »
A spoke front wheel will bolt directly to the F2/3 forks. Keep the axle assembly the same as with K forks: the head of the axle on the right side, then the K speedo drive (or equivalent spacer). On the left side, use the K spacer, and the axle nut. This will center the wheel in the forks.
The spoke wheel has the brake rotor inboard of the F rotor, so spacers approximately .130" thick need to be fitted between the bracket and the lugs on the fork leg to center the bracket over the rotor. To add a rotor on the right side, the spacers need to be thicker, like about .245", since the K hub isn't symmetrical. All other issues with dual disks on a K fork, like the speedo drive, are handled the same way.   
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Offline RAF122S

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Re: Twin Piston Brake Upgrade Using OEM parts For CB750F
« Reply #130 on: October 03, 2017, 07:14:39 am »
Yes, that is a good deal indeed.  I wish I had dual disc on cx500, requires fork leg swap and some GL500I parts...or from one.

Having them Teflon coating gives a very close finish to original texture and sheen. A fellow on CX/GL forums has been using that method on his rebuilds and restorations.  It is impervious to brake fluid and very easy to clean. :D

David- back in the desert SW!

Offline scottly

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Re: Twin Piston Brake Upgrade Using OEM parts For CB750F
« Reply #131 on: January 19, 2020, 07:21:07 pm »
The twin piston pads are available in different compounds: EBC brand FA 69 pads, which are what my local dealer stocks, have a friction coefficient rating of GG, while the EBC FA 69 HH pads have the grippier HH rating..
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Offline scottly

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Re: Twin Piston Brake Upgrade Using OEM parts For CB750F
« Reply #132 on: February 13, 2020, 06:48:24 pm »
I've just found out that there were two different versions of the brackets with the 65mm center-to-center fork lug spacing. I don't know which bikes these came from, but the difference is visually apparent. The one on top mounts the caliper higher and further back than the lower one. I believe the one on top is correct, but all of jaguar's pics on the first post have been eaten by photo-phukit. >:(
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Offline jaguar

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Re: Twin Piston Brake Upgrade Using OEM parts For CB750F
« Reply #133 on: February 17, 2020, 03:35:17 am »
Top looks correct to me

Offline scottly

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Re: Twin Piston Brake Upgrade Using OEM parts For CB750F
« Reply #134 on: February 17, 2020, 09:06:58 pm »
Thanks!!! ;D
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

 

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