cant get sliding pin out of rear calliper on benelli bn125

777 · Borekit Bruiser Joined: 13 Jun 2019 Karma :

ive tried to do this because the brakes are binding slightly and i think it is the pin. i was advised this by my mot mechanic. do these things come out? or are the permanently heat sealed in there? ive tried mole grips and a spanner to try and turn out the pin. also i have tried pulling the thing apart. i also tried oiling it inside the rubber boot. no joy...

the calliper on the benelli bn 125 is a bit odd compared to other bike callipers, i think..

and yeah the pin doesnt move

pdg · World Chat Champion Joined: 15 Sep 2012 Karma :

pics?
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Any and all advice given should not be followed - if you have to ask it means you don't know so get a man in to do it for you.

pdg · World Chat Champion Joined: 15 Sep 2012 Karma :

I say pics because having had a look there appears to be a couple of versions - although none of the ones I've found look anything unusual...
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Any and all advice given should not be followed - if you have to ask it means you don't know so get a man in to do it for you.

777 · Borekit Bruiser Joined: 13 Jun 2019 Karma :

pdg · World Chat Champion Joined: 15 Sep 2012 Karma :

Yeah, that's just a single sided caliper, nothing odd about that.

It's supposed to slide on the pin/bolt because that's how it centres, and the pin should come out by hand (just) if it's functioning correctly.

If it's that stuck, then it'll likely take a combination of penetrating oil, heat and excessive force to remove it, and even after all that there us the possibility that the caliper is scrap. I'd wager the pin is definitely ruined by the corrosion already.
____________________
Any and all advice given should not be followed - if you have to ask it means you don't know so get a man in to do it for you.

777 · Borekit Bruiser Joined: 13 Jun 2019 Karma :

MCN · Super Spammer Joined: 22 Jul 2015 Karma :

Looks awfy like it's been 'over greased' as they say in maintenance circles.

When was the last time you remembered there was a rear brake?

If you neglect it some more it will maybe drop off.
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.

pdg · World Chat Champion Joined: 15 Sep 2012 Karma :

Robby · Dirty Old Man Joined: 16 May 2002 Karma :

If it's the pin on the left hand side of your first picture, it looks like it takes an allen key to undo.

Generally in one piece calipers the pin either screws in, or presses in and is retained with a clip.

You can always buy a new one to get an idea of how it fits, then cut out the old one. Sometimes they seize in place, cutting out the middle section makes it easier to remove the bits.

777 · Borekit Bruiser Joined: 13 Jun 2019 Karma :

MCN · Super Spammer Joined: 22 Jul 2015 Karma :

Robby · Dirty Old Man Joined: 16 May 2002 Karma :

The pins will be available, but you probably need to get creative in looking for parts.

It's a basic caliper, used on loads of bikes, probably a nissin or tokico one. You just need to find another make/model with the same caliper and proper spares support to buy the part.

Kawasaki Jimbo · World Chat Champion Joined: 09 Oct 2015 Karma :

Oddly it looks like they’re sold out but I think it might be an Allen head M10 x 28mm.

If you’ve managed to remove it, get a bolt measuring tool

(eg. https://www.pro-bolt.com/pro-gauge-bolt-measuring-tool-progauge/?srsltid=AfmBOor1lko7c0bicJUC3g3Jlxcy7u4BIVuJD4Ff9GeQOxYRPC5LqXdyxxc)

and then search for the right diameter, pitch and length on
https://www.westfieldfasteners.co.uk/
or a similar supplier.

sickpup · Old Timer Joined: 21 Apr 2004 Karma :

Its a threaded pin, use an allen key. If that doesn't work try heat. If that doesn't work take the caliper off and use heat and an impact driver.

777 · Borekit Bruiser Joined: 13 Jun 2019 Karma :