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Wanted - The stepped bolt that fastens the Grimeca caliper to the fork. Previous owner has welded a stud to the end of the stepped section, the weld has snapped when taking the caliper off to remove the wheel to change a tyre (does get a bit like a hole in my bucket I know).

Mdina don't list them and hopefully someone has a spare in their stash they are willing to sell before I resort to getting one made for me.

Thanks Robin

Hi Robin, will your bucket be repaired to see you at Erwood Sunday !?

Steve, I have a plan B to get a new bolt made, but have to wait until next week before this can be done. Won't be able to make it to Erwood on Sunday unless I come by car.

Starting with a bolt/Screw of an adäquate quality and the thick diámetro it can be made with a lathe easily. A friedlich of mine did it for me years ago

Hi Robin.

This probably doesn't help you in the slightest but I've just looked at my own 3½, and photos of about fourteen others, and all but two had the arrangement seen in the pictures below. It looks like a solid bolt at the bottom and stud/nut arrangement at the top.

I don't suppose it makes any difference, just an observation, really.

Hi Jen, yes that's the setup. Bottom bolt is m10 x 1 25, top bolt is stepped. A previous owner had welded a stud onto the shank. This was a bit wonky and broke when refitting the caliper after a tyre change. I'm getting one made up, not hard as Norbert said, but I don't own a lathe and was hoping somebody my have a spare to get me back on the road more quickly.

I have one from a 350, are you going to Hundredhouse Inn and/or Erwood Station meetings this weekend?

Firstly, the originals were definitely a stepped bolt, not stud&nut, but I believe that the large diameter part was a piece of tubing over the bolt as my original bolts stepped section disappeared when derusting whilst having it replated. This resulted in me using a long M8 bolt with with a separate piece of tubing over the bolt instead.
Worked perfectly all the time I had the original caliper on the bike.
Regards,
George

That's lateral thinking George. Great info. I am now sorted, borrowing one from Ian and getting a pair of stainless stepped bolts machined.

I don't think, that it will be a Problem. But stainless steel bolts woluld probably not be the first choise at that place, I guess. At least for MOT?

RobinSF1 wrote: ↑28 Jun 2025 17:21 That's lateral thinking George. Great info. I am now sorted, borrowing one from Ian and getting a pair of stainless stepped bolts machined.

Get some more made!
Ill buy a pair off you, and Im sure the club members will

norbert wrote: ↑29 Jun 2025 09:58 I don't think, that it will be a Problem. But stainless steel bolts woluld probably not be the first choise at that place, I guess. At least for MOT?

I would pick a high tensile bolt, 8.8.

A lot of load through the bolts if braking, generating a bit of heat. 150kg bike plus rider.