SOHC.co.uk Forums > CB750
Twin disc caliper modification?
Trigger:
A K0, K1 and K2 are not that straight forward as the later ones. They share the same caliper but, not the same arm or lower forks ;)
sprinta:
Thanks for the link Graham and your comments Kevin.
Yes at around £350 plus p & p and import cost it is a rather expensive way to go.
Whilst having the correct handed parts makes for an easier and neater conversion I can't really justify that sort of cost. Having to stretch the hydraulic pipe a bit will not match the LH side, but you can't see both side at the same time?
Perhaps there may be a way to modify the seats so that the nipple and hydraulic connections can be reversed?
I believe that there is also a handed brake pipe/hose brk available, but again if you can find one it is bound to be fairly expensive?
Andy
sprinta:
--- Quote from: 71 V12 on February 11, 2020, 03:05:17 PM ---Hi Sprinta,
I am in the process of gathering the parts to add a right disc to my 750 K4. A second hand Caliper and arm cost me £50 and a disc £20. The Yamiya Caliper and arm is £350 ish plus shipping and duties and looks like K0/1 type to me.
There is a olive of some type in the Caliper in the pipe location. I have removed it by threading it and pulling it out with a screw. I am planning to make brake pipe with a bubble flare and a long M10 tube nut. Hopefully this will seal.
The other issue I can see is securing the steel brake pipe to flexible to the mudguard. The left side has a correctly bent wire welded to the mudguard. Not sure yet what to do for the right side. Maybe a K0/1 type bracket can be adapted.
The conversion is far from straight forward. Where are you at with the job?
Cheers,
Kevin
--- End quote ---
Hi Kevin
You say that you have removed the 'olive'. Do you have a close up photo of it and what sort of seat is left in the caliper after removal?
Andy
71 V12:
The seat is the same as the bleed valve side. As I mentioned I am hoping that a bubble flare will seal without the need for the unobtainium olive.
Bryanj:
The op1 flare,or bubble as you call it, should work and you can get lont brake pipe nuts but make sure you have the correct thread as there ar two BUT you will have to remove the end two or three threads on the nut as the threads in the calliper dont go all the way down.
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