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The 2-Stroke Garage => General Chatter => Topic started by: Hawaii-Mike on April 06, 2022, 07:51:04 PM

Title: Repairing fork lowers
Post by: Hawaii-Mike on April 06, 2022, 07:51:04 PM
My fender got smashed and it busted all four of the mounting points on the fork lowers.

Anyone have suggestions for repair?  I'm thinking either JB weld or Alumiweld.
Title: Re: Repairing fork lowers
Post by: Striker1423 on April 06, 2022, 08:16:43 PM
I would  consider having local whizz-kid welder fix it. But, JB weld works if you mix it correctly.
Title: Re: Repairing fork lowers
Post by: The Red Scourge on April 07, 2022, 09:33:24 AM
What about brazing?  You could stack up the material in the general area, drill and tap the hole, and grind down the outside to match the shape.
Title: Re: Repairing fork lowers
Post by: Milan on April 07, 2022, 10:51:40 AM
Prepare:

Drill small hole(s) in each member aligned with eachother
as many as you can without destroying the integrity
(2) at min.

Get a nail that is sloppy in the hole, & score up the nail circularly
Fill hole with JB, and also mating surfaces.
Clamp together

Clean out inside as much as you can, then re-tap

Polish after.

M
Title: Re: Repairing fork lowers
Post by: m in sc on April 07, 2022, 11:04:49 AM
i could tig that up pretty easy, not a hard repair for somebody that can weld. and dress it. jb will crack, that bolt sees more stress than most realize as the fender acts as a fork brace.
Title: Re: Repairing fork lowers
Post by: Hawaii-Mike on April 07, 2022, 09:45:06 PM
Milan I had to read yours twice to comprehend.

Mark - I don't have easy access to a welder but I do have something similar to Alumiweld.  I might try that - just build it up enough to hold onto the bolts and tap.
Title: Re: Repairing fork lowers
Post by: dgorms on April 07, 2022, 10:59:43 PM
What forks? I might have some in my stash.........................D
Title: Re: Repairing fork lowers
Post by: pidjones on April 08, 2022, 06:57:13 AM
Most every place on the planet has a TIG welder with someone that can use it well nearby. A front fender coming off at speed could be quite catastrophic.
Title: Re: Repairing fork lowers
Post by: Hawaii-Mike on April 08, 2022, 11:00:19 PM
Quote from: dgorms on April 07, 2022, 10:59:43 PM
What forks? I might have some in my stash.........................D
KH400 - to keep costs down I would try any old busted up forks with the threads holding the fender intact.
Title: Re: Repairing fork lowers
Post by: edgefinder on April 20, 2022, 01:47:31 PM
I have forks from my 73 kh400, i'm swappping wheels and suspension. Tubes are good just a couple rust spots hidden by triple clamps. Cheap plus postage from Oklahoma.

Luke
Title: Re: Repairing fork lowers
Post by: Hawaii-Mike on April 20, 2022, 04:39:42 PM
Hi Luke,

I only need the lowers, though if the fork tubes are in good shape (not rusted) they might be worth keeping.  I will send you a PM.