Brembo F09 calipers

futuraman

futuraman

Full member
Location
Knoxville, Tennessee, USA
No problem with mine; just curious. I bought a modded 1200 a year or two ago and it came with them. I did not even notice them at first, just assumed they were f08s that were gold painted. After riding the bike it was apparent that these were something else- they worked about as well as a four piston Brembo!

I have since tried to find out more about them but have not turned up anything other than that they were fitted to the rear of some Guzzis and that pistons and seal are still available :) I believe the pistons are 48mm as opposed to the 38mm on the F08.

When did they first appear and what bikes had them? They are twin-bleeders so I'm guessing that F08 production continued after their demise since they went to a single bleeder on that one. Is there a source for them?

George
 
Hi George,

You are correct on the piston sizes. The FO9 came in gold or black.

Dave Richardson in Guzziology has half a page on them. If you know someone with that text its worth a read but too long for transcription here. In precis:

There are some disk rotors that are OK for FO8's but not FO9's. He does say that the sweep of the pads is greater so if the bike is supposed to have 8's but has 9's then you need to keep an eye on the pads and possibly grind down the unworn edge so they don't touch where they shouldn't on the outside disk edge. About pre 80 they were plated steel pistons that were prone to rusting. Later were anodised aluminium.

I have a black FO9 on the back of my Guzzi SP1000. They don't fit easily on the Lemans due to the 300mm rotors. This is the rear caliper of the linked system so there is a FO8 on the front in the same circuit.

Its due to the higher ratio that they can increase pad pressure but I (this is me not Dave R) suppose an easier way is to go to a slightly smaller master cylinder. Especially if you are unsure the FO9 will interfere with the existing rotor due to the greater pad sweep.

Hope that helps.

rod
 
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