Info on LM2 rear brake caliper please.

[Stevex]

I have a twin bleed nipple P08 caliper fitted to my 1980 LM2 rear brake.
Were these twin bleeds exclusive to this Guzzi model or were the single bleed P08's also fitted?

[blackcat]

I had a twin on my CX.

[canuck750]

Twin bleeder Brembo calipers were standard on most of the 850 and 1000cc Guzzis of the period. They were stock fitted to the dual disc V7 Sport, 750S, 750S3, Le mans MkI and I believe they were also on the Convert and early SP. The Laverda twin and triples with disc brakes from the 70's used the dual bleeder Brembo as well.

[jacksonracingcomau]

I "think" they were using up old stock, at the time it was odd cos some have single bleeders at front and twin at rear, not sure if that carried on into mk 3 but someone will have one at hand. Mark 4's on all single AFAIK

[Groover]

Reviving an old thread here... are the older twin bleed calipers any better than the new ones available with a single nipple? Also, anyone know which of these speed bleeder sizes would be the correct size for the F08 calipers?

http://www.speedbleeder.com/size.htm

[Antietam Classic Cycle]

Reviving an old thread here... are the older twin bleed calipers any better than the new ones available with a single nipple? Also, anyone know which of these speed bleeder sizes would be the correct size for the F08 calipers?

http://www.speedbleeder.com/size.htm

IMO, the old twin-bleeders are worse than the new single bleeders. Unless you're doing a restoration like Jim, the new single bleeders are better. The old twin-bleeders had chrome plated steel pistons, which had a tendency to seize in the caliper body, the new single bleeders have anodized alloy pistons which do not seem to have the same issue. The anodized alloy piston also means the caliper is lighter overall. 

[Groover]

IMO, the old twin-bleeders are worse than the new single bleeders. Unless you're doing a restoration like Jim, the new single bleeders are better. The old twin-bleeders had chrome plated steel pistons, which had a tendency to seize in the caliper body, the new single bleeders have anodized alloy pistons which do not seem to have the same issue. The anodized alloy piston also means the caliper is lighter overall.

Ok, thanks for the reply on that. I may have to switch my G5 ones up in the future. I was bleeding the right front last night, and the inner nipple broke as I tightened it back up, so it's good for now as it is tight until I need to bleed it again. At that point, I may just make the switch to the new type. Cost-wise, the new replacements make complete sense. I just didn't want to lose any performance the doubles may have had over the singles (which it doesn't sound like it). I also like to keep things factory, but in this case, these are still "stock" but improved so I may bend my rules a bit 

[acguzzi]

just to add to the impression that guzzi use whatever is on the shelf, my mkII had single bleeders up front and twin bleeders on the rear, all had steel pistons.

[Antietam Classic Cycle]

Ok, thanks for the reply on that. I may have to switch my G5 ones up in the future. I was bleeding the right front last night, and the inner nipple broke as I tightened it back up, so it's good for now as it is tight until I need to bleed it again. At that point, I may just make the switch to the new type. Cost-wise, the new replacements make complete sense. I just didn't want to lose any performance the doubles may have had over the singles (which it doesn't sound like it). I also like to keep things factory, but in this case, these are still "stock" but improved so I may bend my rules a bit 

I didn't want to deal with the old calipers on my Convert, so just put all new single-bleeders on it. Very glad I did.

[Stevex]

IMO, the old twin-bleeders are worse than the new single bleeders. Unless you're doing a restoration like Jim, the new single bleeders are better. The old twin-bleeders had chrome plated steel pistons, which had a tendency to seize in the caliper body, the new single bleeders have anodized alloy pistons which do not seem to have the same issue. The anodized alloy piston also means the caliper is lighter overall.

You can buy anodised alloy pistons to replace the chrome plated originals, that's what I've done.

[Antietam Classic Cycle]

You can buy anodised alloy pistons to replace the chrome plated originals, that's what I've done.

Sure, that's always an option. But, by time you spend the $$ for new pistons, seal kit, hardware and bleeders, plus spend the time to rebuild the original caliper, it makes sense (to me at least) to just buy a new caliper unless "originality" is a goal.

I used to rebuild them, until I had one that leaked, then I decided "no more". Just can't risk it on customer's bikes (or my own).   

[Dukedesmo]

Quote from: acguzzi on Today at 04:07:22 PM

just to add to the impression that guzzi use whatever is on the shelf, my mkII had single bleeders up front and twin bleeders on the rear, all had steel pistons.

Mine was the same although I replaced the pistons with alloy.

[wirespokes]

Weren't the dual bleeders smaller and tended to shear off like what happened to Groover? Also, the original poster calls them P08 - I'd never heard of anything but F08, and the larger piston version - the F09. Was that a typo or is there such a thing as a P08?

[Antietam Classic Cycle]

Weren't the dual bleeders smaller and tended to shear off like what happened to Groover? Also, the original poster calls them P08 - I'd never heard of anything but F08, and the larger piston version - the F09. Was that a typo or is there such a thing as a P08?

Yes, dual bleeders were M6, single are a beefy M10.

[blackcat]

Weren't the dual bleeders smaller and tended to shear off like what happened to Groover?

One of mine broke off on the rear, but the other one worked. Eventually I just went with a new caliper.