Rear caliper bolt - help!

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Barney93 · #1 Post by **Barney93** » Sat Mar 24, 2012 5:25 pm

An overenthusiastic tightening of one of my rear caliper mounting bolts (within the torque limits and using a torque wrench I might add!) has left it spinning round quite freely...well and truly "wrung"!

Can anyone tell me what to do next. Please??

Many thanks

MartDude · #2 Post by **MartDude** » Sat Mar 24, 2012 5:36 pm

You're not alone

http://apriliaperformance.myfastforum.o ... t6271.html - see particularly posts 1 and 9

Barney93 · #3 Post by **Barney93** » Sat Mar 24, 2012 9:35 pm

Thanks mate. If it's a helicoil I need. Where do I get it and what do I order? Are they handy to fit??

D-Rider · #4 Post by **D-Rider** » Sat Mar 24, 2012 9:50 pm

Barney93 wrote:Thanks mate. If it's a helicoil I need. Where do I get it and what do I order? Are they handy to fit??

I bought a kit of the size I needed to fix the threaded ally mountings into which the mirrors screwed on my son's old CB125.

It was easy to do and made a good job of it.

Bought from ebay

Barney93 · #5 Post by **Barney93** » Sun Mar 25, 2012 2:37 pm

Thanks D-Rider. Any idea what size kit I should buy? What size are those caliper bolts??

Nooj · #6 Post by **Nooj** » Sun Mar 25, 2012 11:33 pm

Caliper bolts from memory (so could be wrong) are M8x25

#7 Post by **mangocrazy** » Mon Mar 26, 2012 7:59 pm

Barney93 wrote:Thanks D-Rider. Any idea what size kit I should buy? What size are those caliper bolts??

What you need is one of these:

http://www.ebay.co.uk/itm/Metric-Screw- ... 5d3254cd6e

With that, you'll be able to identify any metric thread pitch on the bike. To assist with various measuring type jobs (very good for bolt measurements), get one of these:

http://www.ebay.co.uk/itm/6INCH-150MM-D ... 5ae2e62afe

From time to time Lidl and Aldi also stock these, but at that price I'd go for it straight away. For around a tenner, with the two pieces of kit mentioned above, you can identify any bolt/nut on any modern Italian or Japanese motorbike.

You do need to be careful with caliper bolts (whether the ones bolting them to the forks, or the banjo bolts) as they tend to be metric fine thread. Metric standard is M8 x 1.25; metric fine is M8 x 1.00. In M10 it's worse - metric standard (coarse) is M1 x 1.50. Metric fine can be either M10 x 1.25 or M10 x 1.00.