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Post by bigginger on Mar 4, 2021 14:49:42 GMT
What are my options? It’s leaking because it won’t tighten because it has been threaded
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Post by marktrower on Mar 4, 2021 19:08:43 GMT
are you saying the caliper has had a thread insert fitted or the nipple will not tighten as the threads are damaged.the nipple seals through the taper on the nipple hitting the taper at the bottom of the nipple hole if the taper on the caliper as been damaged through drilling oversize to fit the insert your nipple will not seal .there are two ways you can go fit a blank were the nipple goes and get a banjo fitting with a built in nipple or look for a caliper
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Post by bigginger on Mar 4, 2021 19:14:52 GMT
I think I’ll need to get a banjo with a nipple built in. As for the “blank”, is that any bolt as long is it fits, or is that a specific something? I could seal it with resin as the thread for the nipple valve is gone.
Do you know what size the banjo bolt thread is and what size the nipple valve thread is?
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Post by bigginger on Mar 4, 2021 19:17:11 GMT
Also any advice on removing the nipple? It’s just spinning and spinning
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Post by marktrower on Mar 4, 2021 21:19:01 GMT
Now I know what the problem is you have pulled the thread .you need to put the nipple in a vice and pull as hard as you can while twisting the caliper. I would the take it to a engineering company they will be able to fit a insert with out damaging the seat.there are blanks with nipples fitted but you will still need to repair the bleed nipple hole. The problem is cost
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Post by bigginger on Mar 4, 2021 21:28:44 GMT
I got the nipple out. Leveraged with a screwdriver and turned with a ratchet. That’s all done. Do you not think I can just twist it back in with metal epoxy to seal? Then use a new banjo with bleed valve? I think that’s my cheapest and easiest option.
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Post by na44superdream on Mar 4, 2021 22:07:07 GMT
I think I’ll need to get a banjo with a nipple built in. As for the “blank”, is that any bolt as long is it fits, or is that a specific something? I could seal it with resin as the thread for the nipple valve is gone. Do you know what size the banjo bolt thread is and what size the nipple valve thread is? From memory;- The original nipple is M7 x 1.0. (If you are going to blank the hole I would try and tap it M8, Bolt & Epoxy, or under pressure it could be a bullet under pressure! with just epoxy) and The Banjo Thread should be M10 x 1.25. titanclassics.com/product/titanium-duel-banjo-bleeder-m10-x-1-25mm-thread/ |
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Post by bigginger on Mar 4, 2021 22:22:56 GMT
The nipple is held in well with the thread. It’s just too far gone to hold the seal. With your point is well taken. I’ve always wanted to invest in a re-tapping kit for threads. If I hadn’t just today spent £110 on more tools, I’d be far more inclined.
M10 is a popular size for banjos, the 1.25 less so but still available. I’ll have a search on eBay.
How long have you been riding? How long have you owned a superdream?
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Post by na44superdream on Mar 4, 2021 23:16:47 GMT
How long have you been riding? How long have you owned a superdream? Started riding 1981 with a RD125DX twin Black 250NA SD like yours 1982/1983, 1986-now most of the cycle parts and clocks etc from a 400NB (That lived on my 4Four) Then since about 1999 , silver Avatar since 2013. I've a black NA as well, but not road going yet....Engines (not done one for a couple of decades  ), Carbs (mmm), painting of frames (easy after lock down) and half the electrics still to do....(or maybe less). to restore the flotilla to active historic duty  . |
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Post by marktrower on Mar 5, 2021 7:18:53 GMT
I am a bit of a newbee to superdreams first one I got in 2003 had 5 years fun out of that little 250 before some FK whit wanted it more than me.got the one I have now in 2008 not done a deal to it bar ride it and its a 400 cracking little bike back on the road after a 6 year rest back to being my gu for bike
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willy3pigs
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Post by willy3pigs on Mar 5, 2021 10:40:40 GMT
The nipple is held in well with the thread. It’s just too far gone to hold the seal. With your point is well taken. I’ve always wanted to invest in a re-tapping kit for threads. If I hadn’t just today spent £110 on more tools, I’d be far more inclined. M10 is a popular size for banjos, the 1.25 less so but still available. I’ll have a search on eBay. How long have you been riding? How long have you owned a superdream? There's very little meat around the nipple hole in the SD caliper, and as it's tapped 7x1mm your best option would be to replace it with an 8x1mm banjo/bleeder, as the tapping hole size is 7mm.. www.splatshop.co.uk/braktec-special-m8-x-1-banjo-bolt-bleed-nipple.html |
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Post by bigginger on Mar 5, 2021 10:47:04 GMT
The nipple is held in well with the thread. It’s just too far gone to hold the seal. With your point is well taken. I’ve always wanted to invest in a re-tapping kit for threads. If I hadn’t just today spent £110 on more tools, I’d be far more inclined. M10 is a popular size for banjos, the 1.25 less so but still available. I’ll have a search on eBay. How long have you been riding? How long have you owned a superdream? There's very little meat around the nipple hole in the SD caliper, and as it's tapped 7x1mm your best option would be to replace it with an 8x1mm banjo/bleeder, as the tapping hole size is 7mm.. www.splatshop.co.uk/braktec-special-m8-x-1-banjo-bolt-bleed-nipple.htmlI already bought a banjo bolt with a bleed nipple to fit where the banjo is currently. I plan on using a metal epoxy to put the original bleed nipple back and seal it. |
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Post by marktrower on Mar 5, 2021 13:17:14 GMT
I am strongly against what you are doing there is not a resin on this planet that I would gamble my life with you can buy a 8mm tap for little cost and locktite a stud in then you will know when you need to stop quickly it does happen on superdreams important things will stay were they should
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Post by bigginger on Mar 6, 2021 13:21:58 GMT
Very good point. I’ll look into the 8mm tap and banjo
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), Carbs (mmm), painting of frames (easy after lock down) and half the electrics still to do....(or maybe less). to restore the flotilla to active historic duty 
.