New Front Brake Caliper

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Jul 18, 2003
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Has anyone tried the Grimeca front brake caliper? How does it compare to the Lockheed AP caliper?

I would like to know of any hints & tips before commiting to either one.

My original Lockheed front caliper is not easily repairable - the inner piston could not be dislodged ... a previous owner had pushed silastic glue into the bleed hole to stop it leaking. This blocked all fluid to the inner piston. Once the brake shop had drilled the piston & extracted it all was revealed.

While I consider my repair options with the old caliper I want to upgrade.

The Grimeca is less expesive but I don't know anyone using one.
 
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Jun 1, 2003
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brake caliper

I am guessing that your talking about the stock norton caliper. if so it has 44mm pistons. i am not sure about the grimica but the ap racing caliper has 41mm pistons. this is not the hot setup unless you change the master cylinder to one with a smaller bore. you need to find out what size pistons are in the grimica first!!!!! or find a replacment body for your old one.

bill
 

Anonymous

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Norvil makes a kit to replace the disc and caliper but it's a little pricey($520 plus shipping from England) http://www.norvilmotorcycle.co.uk/
I've often thought of the hundreds of disc brakes used on all of the different bikes that there should be a caliper that would match the bolt holes in the fork leg of the Norton, but not having access to a MC junkyard i've never pursued it. If you use the Grimeca caliper you probably need to use the Grimeca master cyclinder too.
 
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caliper

the kit from norvil uses the ap racing caliper with 41mm pistons. you will need a 12mm master cylinder to get close to a proper ratio!!! this is why I asked him to check the piston size on the grimeca caliper.

bill
 
Joined
Jul 18, 2003
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Brake Caliper

Bill - I will confirm the piston size of the Grimeca - I think it is 41mm like the AP Racing caliper but it is prudent to check.

I do have a Grimeca 13mm Master Cylinder that I can use.

If anyone has used this setup I would like to know the outcome.
 
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caliper

tony
the 13mm master cyl is better. it will give you an aprox. 19-1 ratio with the 41mm caliper which is better than the stock setup that was 15-1.

bill
 
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