Topic: Caliper

[bwaller]

Looking for an underslung, opposed piston rear caliper. Must be something available/used during the 70's maybe 80's.

Any suggestions?

[slikwilli420]

You can still find the grimeca ones used on the rear. See them on vintage flat track bikes. Not appreciably lighter than a front though. Not much else period comes to mind. If you can go more modern use a Brembo p32 off a Ducati monster. Light, readily available and cheap.  That's what I'm going to use.

[754]

The PM small caliper used in the 80,s weighs like 14 oz,  not sure if that would be enough braking they are far smaller than the Grimeca.

[Tintop]

You can still find the grimeca ones used on the rear. See them on vintage flat track bikes. Not appreciably lighter than a front though. Not much else period comes to mind. If you can go more modern use a Brembo p32 off a Ducati monster. Light, readily available and cheap.  That's what I'm going to use.

Be careful using the Grimeca, they have been out of production for a while and rebuild kits are very hard to find. 

[slikwilli420]

I've heard that, which is a bummer. If I cannot find a kit for my front when it needs it I'll upgrade to an AP unit. Doesn't give Brent many options to stay period.

[turboguzzi]

in case you havent seen these, same "age group" as your F08s

https://www.ebay.com/itm/moto-guzzi-lario-v65-v50-ducati-rear-brake-caliper/322561916904?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D1%26asc%3D41451%26meid%3Db7d51bb17d3f4ac2942d77ca2ed4d299%26pid%3D100011%26rk%3D5%26rkt%3D8%26sd%3D231934539525

[Medyo Bastos]

You looking for front or rear? I have a few wrapped up under the bed


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[Tintop]

I've heard that, which is a bummer. If I cannot find a kit for my front when it needs it I'll upgrade to an AP unit. Doesn't give Brent many options to stay period.

To do the last ones I used some Brembo seals, ebay pistons, and it took a couple of attempts to find a piston seal.  The Brembo is to thin.  Not saying they can't be rebuilt, just not off the shelf, next day parts availability.

[754]

Which Grimeca is hard to get kits for, the big caliper Or the smaller 41 mm type .

[Terry in Australia]

in case you havent seen these, same "age group" as your F08s

https://www.ebay.com/itm/moto-guzzi-lario-v65-v50-ducati-rear-brake-caliper/322561916904?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D1%26asc%3D41451%26meid%3Db7d51bb17d3f4ac2942d77ca2ed4d299%26pid%3D100011%26rk%3D5%26rkt%3D8%26sd%3D231934539525

Yep, those old Brembo's have been around forever, and work very well.

[bwaller]

Thanks all.

That little Brembo should fit the bill and is lightweight. It probably uses the same pads I use on the front, parts & pads are easily available. I can always invert it after it's bled. I plan to talk to Mr. Morse about a proper sized master cyl.

[754]

 Sandy Kosman is now making new AP knockoffs... without the name on them.
Brand new less pads 139.00 plus shipping.
 SK Racing Products 707 799 7639