How To Stop An HS33 Lever Blade Bolt From Coming Undone

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[edit] Method 1: Adding a nut on the bottom.

Please be aware, this will void your magura warranty.

First remove the bolt and the leaver blade, and turn the lever round on your handlebar so that the thread for the bolt is facing up. Then file the lump off.

Then refit the bolt into the few threads that there will be left, and stick a nut on the end. You can then tighten this up against the body of the lever. You would be better off loctiting this up as well. It will take a few tries to get the tension right, but it works in the end.

It is a good idea to try and find a longer bolt, but I havn't found one yet. This means that you could use a nilock nut with the built in seal instead of having to loctite it.

You can of course just drill the threads out of the lever like on Hope levers and run a longer bolt with a nilock nut on, but you would need a longer bolt.

[edit] Method 2: Adding a bush/spacer.

I havn't tried this method yet, its just one my Dad thought of because he works on a lathe.

Make a spacer to fit in the hole in the lever blade, bearing in mind the hole will need to be drilled bigger. This needs to be slightly thicker than the lever blade itself, so that you can clamp it up and it won't clamp the lever blade. Then replace the bolt and you can now wack it up and loctite it. Because the lever is now turning around the pivot instead of the bolt, the bolt can't come undone. You can also do it up much tighter, because the lever body is tightened up against the pivot, not the lever blade.