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Does anyone recognise this brake calliper?

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Does anyone recognise this brake calliper?
Started at 08:08pm on the 5th March, 2018 by stinkwheel
stinkwheel Subject: Does anyone recognise this brake calliper?
I got it on ebay, price was good. I can't find a picture of a similar one on an enfield anywhere.

It's a brembo calliper but it's a 2-pot OPPOSED calliper, not sliding pin. The pots are huge. It came with a front wheel, clearly enfield fitment but built on a dinky little hub with the meatiest brake disc you ever saw. The spokes are plated steel which makes me think Indian.



The bracket looks a tad homemade, but well homemade so it's not inconceivable it's an actual enfield part.



The whole thing fits a 2004 bullet very well and the calliper lines up perfectly with the disc, the bracket lined up perfectly with the fork lugs.



The whole thing came with an ugly, chunky magura all-in-one throttle and master cylinder assembly.



It all looks well set up and should be a powerful enough brake, it's just I'll need to get parts for it eventually (pads, discs etc) and I have absolutely no idea what it's off.
Posted: 08:08pm 5th March, 2018
papasmurf Subject: Does anyone recognise this brake calliper?
Looks exactly the same as the Brembo caliper as is fitted to my BMW K75S.
Posted: 08:36pm 5th March, 2018
Alan R Subject: Does anyone recognise this brake calliper?
Hi Guys-------- yes same as on my old 'Guzzi Callifornia judging by the size.......or perhaps from the smaller V50 ??..........Have a look at this}-------- https://www.gutsibits.co.uk/pr/TheShop/index.php?f=e&Shnew=1&Model=4&ModelName=Cali+3&Cat=BRA&CatName=Brakes .....
Posted: 08:57pm 5th March, 2018
stinkwheel Subject: Does anyone recognise this brake calliper?
It does indeed look exactly like a K75 calliper! Thanks for that. Well, if two will stop a BMW K-series. One of them should stop an Enfield!

A quick check on ebay shows it's a K-series master cylinder too.

Anyone got any thoughts on the hub/disc?







I didn't pay much for this. It was £140 for the wheel, calliper and master cylinder.
Posted: 08:58pm 5th March, 2018
stinkwheel Subject: Does anyone recognise this brake calliper?
Mind you, the disc does look VERY guzzi when I google them. Early californias seem to have had a similar setup with the disc bolted to a carrier by threaded holes in the disc itself.
Posted: 09:14pm 5th March, 2018
Edward Subject: Does anyone recognise this brake calliper?
If you are buying new pads for the caliper please be aware there are two different sizes. The earlier pads up to 09/88 had 55.5 mm backing plates thereafter 57mm.
Posted: 09:17pm 5th March, 2018
papasmurf Subject: Does anyone recognise this brake calliper?
The disc and hub looks like the one on my CX500 Custom.
Posted: 08:06am 6th March, 2018
ric Subject: Does anyone recognise this brake calliper?
is it me, or just the photo that makes it look as if it could benefit from some slightly longer disc bolts?
Posted: 09:48am 6th March, 2018
papasmurf Subject: Does anyone recognise this brake calliper?
Ric if the bolts were longer they would foul the caliper.
Posted: 09:58am 6th March, 2018
stinkwheel Subject: Does anyone recognise this brake calliper?
I think you're both right. Longer bolts would foul the caliper but they don't seem far enough into the disc.

I've been looking closely and they've fitted spring washers under the disc bolts. I've nevr seen anyone use spring washers in that application before and I think if they're removed, the bolts will finish just below flush with the disc surface which tallies with pictures of similar seups I've seen.

So I think a strip down is in order, remove those spring washers, loctite the disc and carrier bolts (considering replacing the disc bolts with some high tensile button heads), check what is going on in the centre of the hub, replace the cracked speedo drive (I have a metal one) and fit high tensile bolts to hold the caliper on.
Posted: 10:16am 6th March, 2018
papasmurf Subject: Does anyone recognise this brake calliper?
There is only one type of bolt to use on brake discs the correct ones from the manufacturer. They are after all a safety critical item.
Posted: 11:06am 6th March, 2018
stinkwheel Subject: Does anyone recognise this brake calliper?
Which brings us neatly back round in a circle, because we don't actually know the manufacturer and I'm convinced most of these fittings aren't standard, with the possible exception of the disc bolts which look to have been used multiple times by the degree of rounding on the heads.

However, I'm happy enough to consult an engineering chart to see what tension to torque a particular fastener up to. So if I use an M6, 12,9 button head set screw, I need to tighten it to 15 ft/lb. This will stretch it to within 90% of its plastic phase and it wont come undone. 12,9 has the highest tensile strength of routinely available bolts. Locking compound is just belt and braces. If that strips the tread out of the disc, it wasn't a very good disc anyway.
Posted: 12:10pm 6th March, 2018
Alan R Subject: Does anyone recognise this brake calliper?
just a thought but while you have the wheel out you might want to fit our hosts steel axle clamps in place of those standard Aloo-min um ones ??........I had a pair that had cracked on the underside and hence out of sight until I came to fit my disc conversion on the last Bullet....Scary Movie or what ???
Posted: 12:24pm 6th March, 2018
ric Subject: Does anyone recognise this brake calliper?
I think longer bolts would hit the foul the fork leg, not the calliper ;)
Posted: 12:38pm 6th March, 2018
stinkwheel Subject: Does anyone recognise this brake calliper?
Aye, deffo going to change those, the ones on my 350 cracked too. I was considering just making my own out of a bit of billet alloy, the profiling is entirely cosmetic. It really just needs 3 holes drilling in a block of the correct size then cutting in half down the middle. I've got a lump of alloy at home that's about the right size. That said, the steel ones are only £12...

Also pondering if I should just go ahead and helicoil the M8 stud holes now because I've landed up doing all four on my 350.
Posted: 12:39pm 6th March, 2018
papasmurf Subject: Does anyone recognise this brake calliper?
It should be easy to identify the correct bolts, there are loads on the internet specified for the purpose.
Posted: 12:44pm 6th March, 2018
Adrian Subject: Does anyone recognise this brake calliper?
Not just the end-caps, Alan...

I'd be interested to see how well the former drum brake fork slider itself stands up to the stresses of a much more powerful (by RE Indian standards) disk brake. I know our hosts offer a disk brake conversion for drum brake forks, but if I'm correct it's "only" the Pricol version. I think I'd be happier with that brake if it were in a pair of leading-axle B5/C5 forks, where the right hand slider's casting is obviously beefed-up for disk brake use. Get the right year's forks and they will still fit the threaded casquette or fork yoke on the older models.

A.
Posted: 12:51pm 6th March, 2018
stinkwheel Subject: Does anyone recognise this brake calliper?
Just because people sell them for that purpose, doesn't mean they are suitable. You see loads of stainless bolts being sold for brake applications. I'd never use stainless on anything to do with the brakes. Even the very high quality A6 stainless fasteners are weaker than standard 8,8 mild steel.
Posted: 12:53pm 6th March, 2018
stinkwheel Subject: Does anyone recognise this brake calliper?
I looked at the casting and wondered, however, the lugs are only really holding the calliper in place. The braking force itself is acting through the fork leg. In use, assuming the calliper is self centering correctly, the only bit of the lug that sees a significant load is the part between the bolt and the fork leg and that's acting in compression.
Posted: 12:56pm 6th March, 2018
papasmurf Subject: Does anyone recognise this brake calliper?
stinkwheel there stainless and then there is stainless, it depends on the specification of it. I made some small locating pins for the MOD in a previous life out of stainless and although they only had a 6mm thread on one end hitting them with a lump hammer when clamped it a vice had no effect whatsoever except on my wrists.
Posted: 01:01pm 6th March, 2018

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