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Goshreally2
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Joined: 21 Jan 2020
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Location: Buckinghamshire
PostPosted: Wed Sep 29, 2021 10:31 pm    Post subject: Nightmare Nipples Reply with quote

Hi All. I am having problems with my bleeding nipples ( the ones on the motorbike hydraulic systems ). I have a small leak at the bleed nipple on my clutch slave cylinder. I have fitted a new nipple and tightened as much as I really want to and yet still it remains. Has anyone any solutions before I take the slave and brake calipers to an engineer to have the base of the nipple holes dressed. My home equipment isn't great (drill not engineer quality and no engineering tools - my drill bits and bores are good quality). Any ideas would be appreciated.
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creedxup
Parts department
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Joined: 14 Oct 2005
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Location: hastings sussex
PostPosted: Thu Sep 30, 2021 4:23 pm    Post subject: Reply with quote

Have you fitted a genuine bleed nipple?

In the past I needed to replace the nipples on the brakes and bought some of the correct thread size but the angle at the end that seals the fluid off was different and didn’t seal.

You could compare the new and old nipples and ensure they are the same shape.
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1992 RU midnight blue, Wiseco 1070, 6 speed, r1 calipers, ducati discs , 157 bhp crank, Ohlins shock
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Goshreally2
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Location: Buckinghamshire
PostPosted: Thu Sep 30, 2021 6:11 pm    Post subject: Reply with quote

Thanks for the info. Chris. I was using non genuine - I will be looking in to that. Another solution I was looking at was a replacement kit by a company called Welzh Werkzeug. A seller has items that state m8/m5 but that was all it said. So I asked for info. and he couldn't tell me the outer thread diameter and pitch ???? He sent some pictures next to a rule and it looks like an m10, so I am currently waiting to hear if the pictures where of the correct units. I phoned Welzh Werkzeug themselves and they didn't have the information!!! I couldn't believe it. I am hoping to get answers somehow (I am looking into contacting the parent company abroad). If these units are of the correct size and pitch it is a perfect solution to this problem as it provides a new seat for the nipple and the nipple itself.
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creedxup
Parts department
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Joined: 14 Oct 2005
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Location: hastings sussex
PostPosted: Thu Sep 30, 2021 8:12 pm    Post subject: Reply with quote

The bleed screw with rubber cover is still available, Fowler’s have them for a very reasonable £4.51 + post

The part no is 36Y-W0048-00

The brake caliper nipples are more expensive at £10

The part no is 1J3-W0048-00

Strange because I thought they were all the same ?
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1992 RU midnight blue, Wiseco 1070, 6 speed, r1 calipers, ducati discs , 157 bhp crank, Ohlins shock
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creedxup
Parts department
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Joined: 14 Oct 2005
Posts: 2450
Location: hastings sussex
PostPosted: Thu Sep 30, 2021 8:16 pm    Post subject: Reply with quote

There’s a clutch master nipple on eBay for £6 delivered which is probably your best bet

The item no is. 402860855740

Just put that number in the search box

The brake caliper nipples are also available for about the same price as Fowler’s, if you search the part number they all come up 👍
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1992 RU midnight blue, Wiseco 1070, 6 speed, r1 calipers, ducati discs , 157 bhp crank, Ohlins shock
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nuggitt
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Joined: 22 May 2009
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PostPosted: Fri Oct 01, 2021 2:21 pm    Post subject: Reply with quote

I had a problem with leaking nipples 😳 quite a few years back. At the time we had a member (Fang) who was doing a project bike build he too came across this seating fluid problem. He bought some stainless steel nipples 😳 and made tool which enabled him to get a sharper taper on the nipple which cured it. I was cheeky enough to ask him if I could send him 3 stainless nipples 😳 to his address so he could do them for me which he did. What a true gent. 😁👍
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