RGM Lockheed (AP) caliper mounting plate

Can i ask if any owners have fitted the RGM mounting plate for Lockheed (AP) caliper, if so does this affect the fitting of the lower mudguard stay in any way??

Yes, it gets in the way.

Fast Eddie said:

Yes, it gets in the way.

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Thanks Eddie, to what degree does it get in the way... as the stay is chromed is it possible to fit without destroying the finish, or are we say it just not possible to fit.
I spoke with RGM this morning and they were "vague" with the answers on the question

The stay be bent to fit but on a chrome stay the chrome would likely split, the stays are cheap enough to buy and for a 74 at least should be grey not chrome. If you don't bend the stay the caliper stops it being fitted but does show you where the bend needs to be located and also if a different bolt for the stay end is available (but that means hacksawing a section off the end of the stay on the caliper side) . Its not unique to the RGM mount for the Lockheed, they all have the same issue.

Think I've seen a photo here where someone fabricated a custom fender stay for that.

i would appreciate some photos of the stay arrangements used with the RGM mounting adaptor plate, if any one has them .... or could take a few photos??

I bought a stainless steel stay from RGM and bent it to go round caliper bit harder to bend and with a bit of playing with can be made to look right . My view they don't look right left of unless you are using shorty mudguard

phippsy said:

I bought a stainless steel stay from RGM and bent it to go round caliper bit harder to bend and with a bit of playing with can be made to look right . My view they don't look right left of unless you are using shorty mudguard

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Have been looking at these as an option also... i like the one that Holland Norton Works sell (CNW manufacture) but you cant use these with a 4.10 x 19 tyre...so back to the drawing board.
Appreciate that you have bent a stainless stay to fit, but i could do with seeing the RGM mounting plate fitted onto a bike to see what it look s like..
Th other option which i think will look s*** is the swap the fork legs over so the caliper leg is on the left and then fit the caliper and mounting plate down the front of the leg....ghastly thought!!!

I no longer have the rgm plate fitted so can't take a photo gone over to a 6 pot pre tech but still use my st/st stay and I have 2.5 rims and have no clearance problems

I swapped the forks around so that the caliper is in front of the slider on the left hand side and the stay fits unmodified. Its been that way for more than 30 years with no problems.

"Th other option which i think will look s*** is the swap the fork legs over so the caliper leg is on the left and then fit the caliper and mounting plate down the front of the leg....ghastly thought!!!"

I think you have just upset all the MK3 commando owners!!

baz said:

"Th other option which i think will look s*** is the swap the fork legs over so the caliper leg is on the left and then fit the caliper and mounting plate down the front of the leg....ghastly thought!!!"

I think you have just upset all the MK3 commando owners!!

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It's not the calliper position that's the problem .... it's the pig ugly slab of alloy it's stuck too

I’m pretty sure that which ever way you mount it, LHS forward facing or RHS rear facing, it still clashes with either the LHS front or RHS rear stay.

The hNw stay is probably your best option, but note that is designed for the cNw / Brembo kit so will still possibly require some tweaking.

I just run without the stay and have had no problems at all in 8 years but if I do ever replace it I would just get some 12mm round alloy bar and bend it to shape with my big anvil fatten the ends for the mounting bolts holes, have made saddle bag mount using this size alloy and is easy to work with if you have the right gear for the job and it pretty well matches the original stays.

Ashley

olympus said:

It's not the caliper position that's the problem .... it's the pig ugly slab of alloy it's stuck too

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I thoroughly agree, they are all an ugly solution. However, added to that in my opinion the RGM version is also an accident waiting to happen with it's elongated caliper mount holes. If you have already purchased it I would advise making shaped washers to prevent the bolts moving up or down those slotted holes. I bumped into one of our members this year at the Jurby festival who'd done that and made a very neat job of it. Unfortunately I've forgotten his name, but hopefully he'll read this and post some pictures. If you haven't already purchased it I would spend a few bob more and get the Norvil proddy racer slider from Andover Norton or Norvil. Or if budget is an issue get the Norvil adapter from Norvil. (still pigging ugly, but safer).

I made may own stay from alloy tube flattened in the crucial areas. You could also take a look at Triumph's (T140) solution, which was to crank the stays around the caliper. Looks pretty neat in my opinion.

Cheers, and a Happy Healthy New year to one and all,

cliffa.

cliffa said:

I thoroughly agree, they are all an ugly solution. However, added to that in my opinion the RGM version is also an accident waiting to happen with it's elongated caliper mount holes. If you have already purchased it I would advise making shaped washers to prevent the bolts moving up or down those slotted holes. I bumped into one of our members this year at the Jurby festival who'd done that and made a very neat job of it. Unfortunately I've forgotten his name, but hopefully he'll read this and post some pictures. If you haven't already purchased it I would spend a few bob more and get the Norvil proddy racer slider from Andover Norton or Norvil. Or if budget is an issue get the Norvil adapter from Norvil. (still pigging ugly, but safer).

cliffa.

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Except of course, not all discs are the same size! And not all of the pads made for the AP CP 2696 caliper have the friction material in exactly the same place related to the back plate retaining pin holes! (in general terms, just looking at the pads in my workshop, EBC and Ferodo pads can have the friction material around 3mm different in alignment!)

The slots are meant to allow you to place the caliper so that the pad friction material gets a full sweep of the pad track, and so that your caliper does not contact the disc.

But, the slots on the RGM bracket are very long, clearly to address a very wide variation in disc sizes.

I have slots on a commercially purchased bracket for one of my bikes, but they are much shorter, designed for just one disc size. Near enough for me to think this isn't an accident waiting to happen. But I can understand the concerns with the RGM bracket, that really is a long slot.

The 'simple' solution is to make your own bracket. This always sounds easier said than done, without a drawing or pattern, or without a drilling/milling machine.

One way forward is to use a slotted (RGM) bracket to get the caliper location you need, install and test it, then mark the caliper location. Mark out a suitable piece of aluminium plate using your pattern! (Sorry if you think £30 is a lot for a pattern, but in the scheme of things we have all spent more than that on parts we didn't use.)

Yes, personally I would also prefer the AN production racer fork leg, but would suggest that to make that installation work at it's best, you would need the matching correct diameter Norvil disc, probably in 5 stud fitting, unless you want to replace the whole wheel as well. And you may still have issues with suitable pad choices to take best advantage of it!

If you are going this far....and not building a race bike to restricted rules....look at Madass' 'modern' caliper and disc kit, it is probably the cheaper and more effective solution in the end!

Thank you for your input Steve A.
The AN leg look to be unavailable currently, so i have e-mail Norvil to see what support bracket is available from them for the OE disc using an AP calliper.
If i purchase the RGM support, having some alloy material cut/shaped to take out the undue clearance isn't a problem.
With regard to the mudguard, I'm considering the unit from HNW as this will easily accommodate my front tyre size, with the bonus of not requiring any support stays.
I will also first purchase one of HNW extended width stays (yes shaped for a Brembo caliper) but it looks like i should be able to adapt for the AP calliper using either the RGM or Norvil support