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  1. #1
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    Default drum brake bracket

    So im mounting a triumph drum to a sportster front.
    The sportster fork has disk mounts, i made a bracket so the notch on the drum has somethimg to catch on.

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    The bracket is made of 2mm stainless the "catch" is regulair steel mounted by two 6mm bolts and loctite.

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    What do you all think?
    Run as is, or reinforce the 2mm bracket? I also like to ad that there is no play between the shock and the bracket its a tight fit.

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  2. #2
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    Default

    nice little bracket, with some good fab skills. Is that a single or dual leading shoe drum?
    I would not be comfortable with that 2 mm(0.080'") thick plate - I would make it thicker out of an alloy plate (1/4" 6061 or 7075, as that is what I got laying around), or at least a 1/8" thick steel plate bent so no spacers are needed at the caliper mounting lugs.
    Will the plate be tight against the inner side of the fork leg?
    How long will the spacers need to be at the leg caliper brackets? you don't want threads of the bolt to be inside the bracket holes as the threads will get mashed and slop will result.

  3. #3
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    Quote Originally Posted by TriNortchopz View Post
    nice little bracket, with some good fab skills. Is that a single or dual leading shoe drum?
    I would not be comfortable with that 2 mm(0.080'") thick plate - I would make it thicker out of an alloy plate (1/4" 6061 or 7075, as that is what I got laying around), or at least a 1/8" thick steel plate bent so no spacers are needed at the caliper mounting lugs.
    Will the plate be tight against the inner side of the fork leg?
    How long will the spacers need to be at the leg caliper brackets? you don't want threads of the bolt to be inside the bracket holes as the threads will get mashed and slop will result.
    Thanks! Its a single lead shoe.Yes the plate rubs on the fork leg no space what so ever. Spacers wil need to be 10mm ish however i will probably make spacers to size on the lathe weld them onto the bracket. And use bolts which are only threaded at the very end. So i dont expect mashed threads wil be an issue. As far as material thickness what are your thoughts on welding a supportive rib across the existing plate? Because thats what im thinking

  4. #4
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    My preferred solution to your problem, drum brake that needs a tab and forks that don't have one, was to shave the forks and weld on a tab. I've done this once to a 35 mm HD fork with a drum from a big Suzuki dirt bile, and am getting ready to do it again with HD 41 mm forks in bored 39 mm trees with a Triumph/BSA 2LS drum.

  5. #5
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    Quote Originally Posted by MOTher View Post
    My preferred solution to your problem, drum brake that needs a tab and forks that don't have one, was to shave the forks and weld on a tab. I've done this once to a 35 mm HD fork with a drum from a big Suzuki dirt bile, and am getting ready to do it again with HD 41 mm forks in bored 39 mm trees with a Triumph/BSA 2LS drum.
    I agree that would probably be the best solution, though i set a goal to do all fab work myself and i cant weld aluminium.

  6. #6
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    I went the elaborate route and reinforce the existing bracket, thanks for the advice gentleman.
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