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VRSCF
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Discussion Starter · #1 ·
Anyone else noticed that ebay is full of just right hand brembo calipers?

what is happening to the left hand ones?

I need a replacement LH caliper, I cross threaded the pad retaining screw.

Tried a couple of thread repair kits but cant seem to find the correct thread
 

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Anyone else noticed that ebay is full of just right hand brembo calipers?

what is happening to the left hand ones?

I need a replacement LH caliper, I cross threaded the pad retaining screw.

Tried a couple of thread repair kits but cant seem to find the correct thread
Can you not heli coil it? I'll go out in the shed and gauge the pin I have and see what it is. Ebay has some listed.
Ron
Update. Thread is M10 X 1.0. I checked and there are several suppliers for the helicoil kits. Just Google M10 X 1.0 helicoil.
Ron
 

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VRSCF
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Discussion Starter · #3 ·
I would if I knew the correct thread. I thought I got it correct, but it wasnt... tried twice now....spent loads on helicoil kits I dont need.

Does anyone know the correct thread for the brake pad pin retaining pin ?
 

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VRSCF
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Discussion Starter · #5 ·
thanks Ron!

I will give that a try...im sure I have M10 helicoil on the shelf, but wrong thread pitch thats why I dismissed it and bought an imperial equivalent, then it wasnt quite right.

...goes off to buy m10 x 1 :)
 

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VRSCF
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Discussion Starter · #7 ·
thanks Steve....I cant find time-sert in UK, but have found some other kits on UK amazon

Update, found an M10 kit in my garage, from another job...thought it was different thread but definitely M10 x 1

So I try inserting the brake pad retaining pin into the insert and its quite loose, can push it right through, it does not thread in at all. Is that normal and maybe the insert tightens up a bit when put into the hole ?

...its a few years since Ive used a thread repair kit and cant remember how well the bolt fits the insert....

thanks
 

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thanks Steve....I cant find time-sert in UK, but have found some other kits on UK amazon

Update, found an M10 kit in my garage, from another job...thought it was different thread but definitely M10 x 1

So I try inserting the brake pad retaining pin into the insert and its quite loose, can push it right through, it does not thread in at all. Is that normal and maybe the insert tightens up a bit when put into the hole ?

...its a few years since Ive used a thread repair kit and cant remember how well the bolt fits the insert....

thanks
That's too bad you can’t get time-serts. I don't have the Harley Brembo calipers so I don't have a brake pad pin to look at. What's the OD of the threaded portion of the brake pad pin?

It could be a little less than 10 mm (e.g. 9.85) but it shouldn't fit through the female 10 mm threads (≈ 9.35).

Thread inserts vary quite a bit from one brand to another so I can't comment on what you're working with.
 

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That's too bad you can’t get time-serts. I don't have the Harley Brembo calipers so I don't have a brake pad pin to look at. What's the OD of the threaded portion of the brake pad pin?

It could be a little less than 10 mm (e.g. 9.85) but it shouldn't fit through the female 10 mm threads (≈ 9.35).

Thread inserts vary quite a bit from one brand to another so I can't comment on what you're working with.
It was about that when I measured, closer to 9.9. MM or SAE for that matter never measure exactly what it's called. As for helicoil vs insert , sure the insert is better if you can get it but all pin loading in this case is radial and in reality the helicol will still offer a better grip then the plain old aluminum threads did. Helicoils are slightly looser then the original tapped hole. Some tighter then others depending on the heli tap used, method of tapping as in dry or cutting fluid used also . Inserts usually fit more snugly as a rule. I've made inserts using a bolt, drilling the center and tapping it which is another option if the meat around the hole is thick enough to handle the inserts OD requirements.
Ron
 

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VRSCF
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Discussion Starter · #10 ·
OD is about 8.5mm of the threaded part of brake pad pin ive got, this is off my 2012 F with the black calipers

Ive got a set of threaded insert in various metric sizes M6, 8, 10 and it seems that none fit when I offer the pin into the insert, always too small or too big, hence I thought it must be some strange imperial size
 

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OD is about 8.5mm of the threaded part of brake pad pin ive got, this is off my 2012 F with the black calipers

Ive got a set of threaded insert in various metric sizes M6, 8, 10 and it seems that none fit when I offer the pin into the insert, always too small or too big, hence I thought it must be some strange imperial size
Ok, so just came in from measuring that rear spare pin I have. Don't know if front and rear pins have different sizes as I don't have the front handy. The rear pin measures 9.88 and is definately a 1.0 pitch. You need to mike and pitch check the pin you have.
Too bad I don't have a front pin and compare it to the rear pin for OD and pitch. Sounds like it could be different. Parts book shows different part numbers. Front is 42849-08 Rear pin is 42865-06b
Front pins could be Imperial thread, after all the damn bleeders area on front and rear. Mixed bag . A clue could be what size of tool needed to remove the pin. Metric or Imperial.
Ron
 

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VRSCF
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Discussion Starter · #12 ·
Defo p/n 42849-08 as I have a new one in the bag ready to go on.

thanks Ron for measuring the rear and confirming, i note its different p/n too. I know some other fasteners on the bike are imperial, its a real mix :)

I tried a 3/8 UNC thread insert as I had one of those kicking about from an old classic, it was so close i thought that was it, then when I fit the insert and screw the bolt in, its real tight, just not correct, screws in 1/2 way so tight im not looking forward to removing it

Anyway thats whats been in there since I messed it up last year. Now ive got a few months off work so figured I would fix it properly or get a used caliper and replace the lot.

So the mystery of the thread continues ....and the shortage of used LH calipers !
 

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Defo p/n 42849-08 as I have a new one in the bag ready to go on.

thanks Ron for measuring the rear and confirming, i note its different p/n too. I know some other fasteners on the bike are imperial, its a real mix :)

I tried a 3/8 UNC thread insert as I had one of those kicking about from an old classic, it was so close i thought that was it, then when I fit the insert and screw the bolt in, its real tight, just not correct, screws in 1/2 way so tight im not looking forward to removing it

Anyway thats whats been in there since I messed it up last year. Now ive got a few months off work so figured I would fix it properly or get a used caliper and replace the lot.

So the mystery of the thread continues ....and the shortage of used LH calipers !
Yes, I also tried the 24 tpi nut on the bolt and it was close, as in 3/8" x 24 but there was just a slight misalignment using the gauge that it would jam if it did screw in, likely about 2 revolutions. The pad bolt DIA was also .389" so while the pitch of 24 was close the dia kept it from scewing into a 3/8x24 nut. Definately a metric thread on that rear pad bolt. Baffles me as to what you have there? The rear pin 42865-06b is totally M10 x 1.0 I measured another 10mm bolt I had and it came in at same dia.
As you say, the front 42849-08 pin is a mystery at this point.
Ron
 

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VRSCF
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Discussion Starter · #14 ·
Okay, some progress I think. Its a 5mm allen socket

I have M10 x 1.5mm insert and it nearly fits, bit tight. I also tried M10 x 1.0 and its too loose

typically I reckon its the insert I dont have in my thread repair kit - M10 x 1.25mm

will have to give that a try next, otherwise found a pair of new calipers for 30% of new price on ebay.
 

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Okay, some progress I think. Its a 5mm allen socket

I have M10 x 1.5mm insert and it nearly fits, bit tight. I also tried M10 x 1.0 and its too loose

typically I reckon its the insert I dont have in my thread repair kit - M10 x 1.25mm

will have to give that a try next, otherwise found a pair of new calipers for 30% of new price on ebay.
The 1.5 will get tight as it starts to jam in pitch. Maybe the inserts you have suck. Also, sometimes depending on tap the insert gets tighter in the hole. A test install in scrap aluminun would show what's up.It's never cut and dried is it.? Ebay works too.
Ron
 

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Yes exactly that - the 1.5 gets tight after couple of turns

I will try the 1.25 when I get them tomorrow, it really has got to be M10
Maybe the 1.25 will get you 3 turns. LOL. It could also be the pin for the fronts are 1.25 pitch. Rear is def 1.0 but I don't have a front laying around to compare pitch. Keep in mind whatever you do, no thread will be as tight as OEM. I swear they buy used, worn out taps from India, the damn threads are almost interference in some spots on these bikes. Always tighter then most average taps we use.
Ron
 

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VRSCF
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Discussion Starter · #18 ·
It could be 1.0 pitch, maybe the insert I have will tighten up a bit when used. I will do as you suggest and try one in some aluminium first. Ive got all options to try now :)

A few years back the disc bolts on my OE wheels would not torque up ....the ally was so soft and I discovered some of the threads must had been messed up by an over zealous bike shop I used to use (I had never replaced the discs myself until that point)

Anyway, I ended up fitting helicoil inserts to all the disc bolts up front and the inserts we so much better than OE threads, and the bolts torqued up really nice after that.
 

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Don't know about the UK but here in the states you can go to a ACE hardware store with your bolt and use their size measuring charts to determine bolt/nut size. Probably and place that sells screws/nuts/bolts will have a way to determine its size.
'
Take a known good one with you.
 

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Don't know about the UK but here in the states you can go to a ACE hardware store with your bolt and use their size measuring charts to determine bolt/nut size. Probably and place that sells screws/nuts/bolts will have a way to determine its size.
'
Take a known good one with you.
That's one option if you don't have calipers or thread gauges.
Ron
 
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