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Author Topic: Master cylinder banjo bolt thread pitch.  (Read 5796 times)
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mangocrazy
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Graham Stewart


« on: July 20, 2018, 08:55:28 PM »

Can anyone tell me what the thread pitch is on the master cylinder outlets, please? I'll be doing a full refurb at some point and I'd like to replace the banjo bolts with stainless items. I know the calipers are M10 x 1.25 pitch and I'm guessing the m/cyl outlets are the same, but would like confirmation.

Thanks in advance.
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LanciaDave
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« Reply #1 on: July 05, 2019, 12:29:22 AM »

Yes, its M10 x 1.25. That is for both the regular banjo bolt fitting on the MC, and the special odd banjo bolt that is a combination banjo and female union. Same thread on both ends of it. That bolt is flat on the end into the MC with female bubble flare from pipe on the other end. Another note is I received a MC from another vender which did not enable that connection to seat properly. I had to grind away excess material around to allow a leak-free connection.

I know this is likely too late but in case others want to know.

Dave Decker
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Dave
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fred2660
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« Reply #2 on: July 08, 2020, 05:26:25 PM »

How hard do you torque these banjo bolts?
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HFStuart
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« Reply #3 on: October 30, 2020, 06:22:56 PM »

Hand tight with a spanner only. That's more than enough to seal them.
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mangocrazy
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Graham Stewart


« Reply #4 on: October 30, 2020, 07:50:02 PM »

The above assumes new copper washers, of course. I've re-used copper washers in the past, and normally regretted it later. You could always anneal and re-use them but for what they cost I really don't think it's worth it. Even then I doubt if an annealed washer is as good as a new one.
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1980 Lancia Beta Spider 2000 (S2FL)
2002 VW Transporter T4
2017 KTM Duke 690R
2008 Aprilia SL1000 Falco
1992 Ducati 888 SP3
1988 Honda VFR750F
1980 Yamaha RD350LC
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