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Front Disc In Contact With Caliper
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r083rt
Sun Aug 07 2016, 06:34pm
r083rt
Registered Member #857
Joined: Fri Oct 02 2015, 09:47am

Posts: 125
Removing the tyres today on the HP2 revealed that the front brake disc has been in contact with the caliper for some time now.

What do you guys make of this?

Additionally, the pads seem to have been chipped off in a couple places. Time to replace?





[ Edited Tue Aug 09 2016, 04:21pm ]
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SnoDawg
Sun Aug 07 2016, 10:54pm
Registered Member #659
Joined: Sun Apr 28 2013, 12:27pm

Posts: 271
Yikes - glad you caught that before it got really bad.

Sno Dawg
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Lariviere
Mon Aug 08 2016, 08:50pm
Guy
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Joined: Wed Jun 20 2012, 11:29pm

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There are 2 mounting positions for the Front Caliper, are you in the right one?
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r083rt
Mon Aug 08 2016, 09:03pm
r083rt
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Joined: Fri Oct 02 2015, 09:47am

Posts: 125
Lariviere wrote ...

There are 2 mounting positions for the Front Caliper, are you in the right one?


I am unsure. I haven't been into the front end since I got the bike back in the fall. I suppose there's a chance the previous owner mounted the caliper incorrectly.

Can you shed any more light on the two different mounting positions?
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xrnik
Tue Aug 09 2016, 05:29am
xrnik
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Joined: Sun Jan 18 2009, 08:53pm

Posts: 187
Once I have changed the front pads and discovered that had used the wrong position on the mounting holes. The result was that the pads were partial worn and didn't had a sign on the caliper. That happened because I have used the upper holes to mount the caliper , so the caliper was few cm back as the supermoto disk is bigger. I can remember that the upper holes are used for supermoto wheels and the down ones are for enduro wheels. 270mm endruo disk, 290mm on supermoto wheel. in my opinion check something else first.

[ Edited Tue Aug 09 2016, 05:38am ]
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r083rt
Tue Aug 09 2016, 02:44pm
r083rt
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Joined: Fri Oct 02 2015, 09:47am

Posts: 125
Thanks for the info. I will ensure that the caliper is mounted in the lower holes for the 21" wheel/270 mm disc.

As I'm away from the bike this week, I will check this weekend.

Any other inputs?
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r083rt
Tue Aug 09 2016, 04:20pm
r083rt
Registered Member #857
Joined: Fri Oct 02 2015, 09:47am

Posts: 125
I had someone who had access to the bike take a photo showing that the caliper is in fact mounted in the lower holes.

What else could be causing the disc to contact the caliper? Clearly one or the other is spaced incorrectly but it doesn't seem like there is any room for adjustment?



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zool
Wed Aug 10 2016, 01:27am
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Joined: Tue Apr 24 2012, 09:13am

Posts: 38
Bent disk or wrong wheel offset (if your front wheel axel bolt is striped it can lead to misalignment of wheel) can cause this.
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r083rt
Sun Aug 14 2016, 01:46am
r083rt
Registered Member #857
Joined: Fri Oct 02 2015, 09:47am

Posts: 125
Installed the wheels back on the bike after inspecting the caliper mount. Once everything was torqued and reading in the manual I discovered some slop in the wheel bearing which allowed the wheel (and disc) to deflect just enough to contact the caliper.

Here are the torque settings I used in the order that I torqued everthing:

Front Brake Caliper Bolts: 30 Nm
Front Axle Bolt: 20 Nm
Axle Pinch Bolts: 8 Nm

Also, a selection from the manual:





[ Edited Sun Aug 14 2016, 07:53am ]
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zool
Mon Aug 15 2016, 10:45am
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Joined: Tue Apr 24 2012, 09:13am

Posts: 38
Front axel bolt should be 40NM.
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r083rt
Mon Aug 15 2016, 09:03pm
r083rt
Registered Member #857
Joined: Fri Oct 02 2015, 09:47am

Posts: 125
I've read several sources that say 20Nm. Including this website:

http://www.hp2enduro.com/page.php?8
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zool
Mon Aug 15 2016, 11:08pm
Registered Member #542
Joined: Tue Apr 24 2012, 09:13am

Posts: 38
According to riders manual is 40nm.


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zool
Tue Aug 16 2016, 12:03am
Registered Member #542
Joined: Tue Apr 24 2012, 09:13am

Posts: 38
Additionally in workshop manual is also 40nm



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r083rt
Tue Aug 16 2016, 02:38am
r083rt
Registered Member #857
Joined: Fri Oct 02 2015, 09:47am

Posts: 125
I guess I should have been more specific. I wasn't disagreeing with you, I've just read of stripping the bolt when trying to torque to 40 Nm.

At any rate, thanks for posting the references.
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r083rt
Tue Aug 16 2016, 02:44am
r083rt
Registered Member #857
Joined: Fri Oct 02 2015, 09:47am

Posts: 125
More info on the issue at hand:

The entire wheel seems to be able to shift a few millimeters on the axle. It's not the wheel bearings but rather that the whole wheel can wander on the axle.

What could be worn or out of adjustment to cause this?

Would shimming the wheel be an option? That is, to put a shim or two between the fork leg and the spacer.




Ultimately what needs to happen is that the wheel needs to go about 2mm in away from the caliper side fork like this:

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