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Discussion Starter · #1 ·
Okay
Im running a trump front drum and im having issues , i keep bending the brake stay the ive welded to the rear leg .
Im not really sure what im doing wrong , Should i have the stay higher up the leg ? or should i move the privot from the drum back so i have a longer pivet arm that way ?
Im also running new springs inner's and out's
hope that sorta makes sence , ive whacked on some pics

Cheers All




 

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1. The stay should form a 90 degree angle with the place it bolts to the plate and the axle for peek performance.

2. Weld a flange onto the back of the rear leg. That's how HD did it. Someone probably repops them so get one and braze it on.

Here's a pic stolen from Kickstart Cycle Supply.

 

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  • first and foremost, the rear mount looks way to flimsy, plus the heim is mounted so far out on it, there's a ton of moment or leverage. is that a 5/16" bolt butt welded to the rear leg? as others pointed out, i'd mimic a stock one as close as possible.
  • second, the brake backing plate needs to free of the hub/axle, etc. It should be floating, which I can't tell in your pic. If it isn't you need to come up with a new design.
  • lastly, as was pointed out the anchor arm should be parallel to the rocker (holes for the axle and rear leg). but it looks like you are close enough already that I doubt that's causing any issue.
 

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Discussion Starter · #6 ·
Thanks guys ,,, All sorted now
I think im just used to building pommie bikes and didnt go heavey duty enough.

Way better now !
 

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there is now way i would have used the brake with that original mount. did you ever do any emergency stops? that shit would shear right off.
 

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Discussion Starter · #11 ·
I ended up welding a thick lug on the back leg then turned up and tapped a bung so a high tensile bolt can screw through , then welded the bung to the lug , Works way better

Cheers





 
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