RGS/SFC Rear Caliper Bracket Question

K

Kristian

New member
I have an SFC swinging arm complete with a under-slung caliper mounting bracket on my RGS (as fitted by the previous owner I assume..)
The caliper hanger/bracket in question has recently fractured at a mounting point and now needs replacement.
My question to the All Knowing is this: Can I replace the broken SFC item with one from a RGS so I can have the caliper mounted ON TOP of the swinging arm rather than underneath?
I like the idea of  having the brake mounted  higher up out the road muck. Easier to bleed as well.
Any compatability issues between an RGS bracket and an SFC swinging arm? Or am I obliged to replace like with like...

Thanks!

Kristian
 
Kristian said:
My question to the All Knowing is this: Can I replace the broken SFC item with one from a RGS so I can have the caliper mounted ON TOP of the swinging arm rather than underneath?
Click to expand...

Simple answer...NO!

The alloy SFC swinger doesn't have the appropriate bracket to locate the RGS caliper bracket.

Please be aware there are 2 types of SFC bracket, one with a bearing mounted in the plate for full floating function and a solid mounted type!  The earlier floating type can/will develop slop and the bike is then difficult to move backwards as the caliper tends to jam on the disc during rearward rotation.  Bit of a bastard when needing to move the bike within confined spaces.

Both types can be easily replicated from alloy plate.  At least one type is still available from OCT, don't remember which, though.

piet
 
Kristian,

Which mounting point broke - and how?  They look quite robust to me, though the hole in the caliper bracket for the torque arm pin had worn oval on mine (had it weld filled, redrilled and reamed to a close sliding fit).

I have just accepted that the caliper position is vulnerable to muck and water and will keep it clean - its a bit like the early T140 Bonneville underslung rear brake caliper ...fit and forget!

Piet,

I had seen two different types of torque arm, a ball jointed one and my type - forks and spring clip pins - thought that was just a cost saving measure.  What was the floating bit? 

Cheers, Andy 
 
I have an underslung upgrade on my Rga same as RGS braced with modifified bracket making the factory one redundant.Bracing arm to footrest mounting bolt with neat mod from Keith at Laverdascozia.

Shaun

 
Hi Andy,

In response to your question: The torque arm parted company with the calliper bracket due to the securing allen bolt coming loose (seemingly due to stripping it's threads) whilst on the move...the bracket plus calliper then went round with the wheel and smacked the top of the swing arm breaking the aforementioned mounting point.
VERY lucky that the wheel didn't jam or that the tyre valve wasn't knocked off...

Cheers....Kristian
 
Andy,

The floaters have a rose jointed torque arm fixed to the frame, at the cross tube under the swingarm pivot.  The later pin/clevis type is fixed to the swingarm itself.

No real difference in action, reckon Breganze changed it because of the slop developing.  My RGS is fitted with GSXR wheels and the appropriate floating brake caliper, same thing.  Sloppy caliper mount allows the caliper to jam on the disc in rearward motion... bugger.  Will re-bush the mount and close up tolerances to get it all in line again.

piet
 
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