Making a note of this here in case it helps others.
I've been gathering the parts to upgrade the front brake with a Brembo 4-pot Goldline caliper, as per Ducati Monster etc., but one of the pinch bolts holding the caliper halves together was seized solid. The bolt is a low-head M8 x 1.25 originally fitted dry by the look of the three that came out reasonably easily, but none of the usual removal methods including various combinations of gas torch heating, impact driver, soaking in PlusGas, slotting the now deformed head for a different impact driver bit, etc etc. moved the thing in the slightest.
Then it dawned on me that the threaded end of the bolt protruded maybe 1/2 a mm from the back of the caliper so if I could squeeze the bastard front and back so an impact driver bit would get a really solid hold, use the bit's hex to stop it turning, I could lift the caliper .... and it worked. It was crazy tight and I had to sit on the bench to stop it lifting but it went with a snap and I can now get on with the refurb.
If the bolt didn't protrude far enough I was going to find something as a little spacer between the bolt end and the vice jaw, but fortunately there was no need. Here's some pics of the Heath Robinson setup:
I had got to the point where I'd run out of options and was going to drill the bolt out to weaken it's adhesion, which was always going to be a challenge as I don't have the right kit, and then had this idea.
And now I'm going to have a self-congratulatory beer.
Cliff
I've been gathering the parts to upgrade the front brake with a Brembo 4-pot Goldline caliper, as per Ducati Monster etc., but one of the pinch bolts holding the caliper halves together was seized solid. The bolt is a low-head M8 x 1.25 originally fitted dry by the look of the three that came out reasonably easily, but none of the usual removal methods including various combinations of gas torch heating, impact driver, soaking in PlusGas, slotting the now deformed head for a different impact driver bit, etc etc. moved the thing in the slightest.
Then it dawned on me that the threaded end of the bolt protruded maybe 1/2 a mm from the back of the caliper so if I could squeeze the bastard front and back so an impact driver bit would get a really solid hold, use the bit's hex to stop it turning, I could lift the caliper .... and it worked. It was crazy tight and I had to sit on the bench to stop it lifting but it went with a snap and I can now get on with the refurb.
If the bolt didn't protrude far enough I was going to find something as a little spacer between the bolt end and the vice jaw, but fortunately there was no need. Here's some pics of the Heath Robinson setup:
I had got to the point where I'd run out of options and was going to drill the bolt out to weaken it's adhesion, which was always going to be a challenge as I don't have the right kit, and then had this idea.
And now I'm going to have a self-congratulatory beer.
Cliff