snapped bleed nipple - XJ600N Diversion rear caliper

[Swim41]

Installed new pads today, and decided to change the rear fluid too. Big mistake. The bleed nipples have been snapped off flush.

Now, is there anything I can do without buying a new caliper? I notice that union bolts with integral nipples are available for this kind of application however, due to the design of the caliper with two seperate bleed nipples I am wondering if this will work.

https://www.dirtbikebitz.com/images/products/brake/Venhill_Banjo_Bolt_Bleed.jpg

Has anyone any experience of using these?

For reference this is two piston opposing caliper (one piston each side of the disc).

Forgive my ignorance.
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Yamaha XJ600N

[Pete.]

You can use that with some messing around. If you pump the pistons out on the caliper with it removed from the disc it will partially-fill them with oil. Now lay the caliper on it's side with the oil line uppermost and squeeze the lower half piston back in. Because the air in the cylinder will be highest you'll force it into the upper cylinder. Now un-do the bleed nipple on the banjo nut and push the upper pisto in, the air will be forced back up the pipe and out of the nipple. A couple of repeats should get you a working brake.

Another option is to drill and tap a thread in the back of the caliper and use that as a bleed, capping it with a small screw and fiber washer.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Itchy]

the simplest solution is a banjo bolt the kind that come with built in bleed nipples.
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Spain 2008France 2007Big one 2009 We all die. The goal isn't to live forever, the goal is to create something that will. In the end, your life will flash before your eyes. Make sure it is worth watching.

[Swim41]

Right, I'll look into it. At the moment the snapped nipples are tight so no worries about leaking. I'll try one of the banjos and see how I get on - expect a 'help!' post in the next week or so

cheers
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Yamaha XJ600N

[Kickstart]

[Swim41]

[Kickstart]

Hi

Personally I would suggest getting a spare caliper to give you a bit of time. Once you have that handy then take the existing caliper off and take it to a small engineering shop to drill the bleed nipples out

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Itchy]

[Kickstart]

Hi

Only because drilling it out possibly leaves him without transport while it is being done.

Fair chance the replacement will not be far behind!

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Robby]

Bleed nipples come in a few different thread sizes. Last time I had one chew its thread on the bike I drilled and tapped the bleed nipple hole up to the next size, to fit a car bleed nipple that was in my toolbox. I have also successfully used an screw extractor on snapped off one before.

Whatever you do, you'll need to completely strip and clean the caliper afterwards to remove every last trace of swarf.

[M1ke]

I've had a few diversions now and they all have had snapped bleed nipples either on the front or rear caliper! I strongly suspect that they are made from cheese.

Before you buy a spare off ebay, obviously make sure that the nipple is intact, but also ask the seller to make sure that it can be undone. I bought a spare front caliper off Ebay once, the nipple was intact but once i'd fitted it to the bike, tried to bleed it, I snapped the f*cker. So was back to square one.

I've found the banjo bolts with the bleed nipples built in work pretty well and only cost a few £.

[Walloper]

Before you buy off ebay etc. you can still drill out the broken nipple and replace with a new one. Cheaper.
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W-ireless A-rtificial L-ifeform L-imited to O-bservation P-eacekeeping and E-fficient R-epair

[robocog]

Assuming caliper is alloy and nipple is steel (like they were on my CJ/CB360 monstrosity)
The way I did it when mine snapped flush was got a nut and welded it down the center to the end of the broken nipple

I'm sure the heat from the mig weld helped break the seal, and it almost span off using bare fingers once cooled

Worth a pop if you have someone handy with a mig welder?

I would be very cautious about using easy outs...can't think of any occasion where they have "just worked" for me
My (limited) experience is that they just break making the job 100% more inconvenient

Regards
Rob
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Needs a bigger garage...

[Swim41]

Phoned up a local engineering firm and they think that it should be possible to drill it out and retap, but they'd have to look at it first. Alternatively, I checked at the local breakers and they have got second hand ones in stock, but whether they'd be willing to demonstrate the nipples being removed is another matter. Third option is to have a crack with the bleedable banjo and hope for the best.

Thankfully I've got a 125 I can use in the meanwhile until I get it sorted.

Thanks for the input, I'll let you know how I get on.
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Yamaha XJ600N