Author Topic: Trigger Happy with the Flap Disc  (Read 1180 times)

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Offline Ellz10

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Trigger Happy with the Flap Disc
« on: April 22, 2022, 08:59:36 PM »
Got a little trigger happy with the flap disc when I was cutting off tabs and triangles. Now about half of the spots I cut and grinded down are very wavy and uneven. Will post a decent picture tomorrow.

What is the best way to go about smoothing them down and rounding them out or blending it in? Metal file then sand?

Thoughts, input, advice. All is welcome.
« Last Edit: April 23, 2022, 06:26:26 AM by Ellz10 »
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Offline Kevnz

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Re: Trigger Happy with the Angle Grinder
« Reply #1 on: April 22, 2022, 09:29:31 PM »
Maybe a bit of braze? Or even body solder?
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Offline Ellz10

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Re: Trigger Happy with the Flap Disc
« Reply #2 on: April 23, 2022, 06:27:07 AM »
I meant flap disc. It was late when I posted this and I was exhausted.
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Offline BomberMann650

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Re: Trigger Happy with the Flap Disc
« Reply #3 on: April 23, 2022, 12:02:01 PM »
A long narrow strip of sandpaper can help restore roundness.  A file is good for smoothening too.

Someone actually made a tool attachment to motorize the process.  Basically a three wheeled belt sander with a spring loaded capstain.

Offline Ellz10

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Re: Trigger Happy with the Flap Disc
« Reply #4 on: April 23, 2022, 01:58:21 PM »
A long narrow strip of sandpaper can help restore roundness.  A file is good for smoothening too.

Someone actually made a tool attachment to motorize the process.  Basically a three wheeled belt sander with a spring loaded capstain.

I'll go ahead and give the sanding a try first then.

I'd love to have that tool! I saw one sort of like it in the Eastwood magazine.


P.S.   That's a great avatar!  ;D
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Offline Ellz10

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Re: Trigger Happy with the Flap Disc
« Reply #5 on: May 10, 2022, 01:38:05 PM »
Update*

I have not been able to restore the roundness of the tube frame. I don't know what to do at this point. Do I smother JB Steel stick on the spots and then try to shape it, I just don't know.

If I just take it to be powdercoated, can I just tell them there's wavy spots and to go heavier in those areas? Is there such a thing as buildable or self-leveling powdercoat kinda like there is for primer?
.I'm at a loss here and it's put a stop on my build.
« Last Edit: May 10, 2022, 01:40:58 PM by Ellz10 »
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Offline WhyNot2

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Re: Trigger Happy with the Flap Disc
« Reply #6 on: May 11, 2022, 04:28:52 AM »
Update*

I have not been able to restore the roundness of the tube frame. I don't know what to do at this point. Do I smother JB Steel stick on the spots and then try to shape it, I just don't know.

If I just take it to be powdercoated, can I just tell them there's wavy spots and to go heavier in those areas? Is there such a thing as buildable or self-leveling powdercoat kinda like there is for primer?
.I'm at a loss here and it's put a stop on my build.

Wow, looks like a frame I'm working on. Mine just not quite that bad. I'm wondering what  to do too.

The places that will be hidden by the tank or othe things, I ain't gonna worry about those areas. Places exposed, maybe bondo, not sure, gonna give it a try.
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If it sounds like I know what I'm talking about, it's because I cut and pasted from someone else.

Offline newday777

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Re: Trigger Happy with the Flap Disc
« Reply #7 on: May 11, 2022, 05:03:18 AM »
I don't think jb weld will hold up to the heat cure of powder coating.
Better would be welding or brazing.
Stu
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My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
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Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
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New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
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Offline newday777

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Re: Trigger Happy with the Flap Disc
« Reply #8 on: May 11, 2022, 05:06:58 AM »
Besides the frame at the shock mount looks weak (holes?) besides being thin and not round.
Or get a donor frame and cut and paste.....
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline BomberMann650

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Re: Trigger Happy with the Flap Disc
« Reply #9 on: May 11, 2022, 10:10:23 AM »
There's always textured powder coat options.  That will blend the entire frame into a hand hammered look.

Would be unique for sure.

Offline ThePwninator

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Re: Trigger Happy with the Flap Disc
« Reply #10 on: May 11, 2022, 12:21:21 PM »
Have you tried to file it out and then sand?

Offline Don R

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Re: Trigger Happy with the Flap Disc
« Reply #11 on: May 11, 2022, 06:16:23 PM »
  Dude, you gotta stop doing that. There's no magic fix for that. Sorry.
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Offline Ellz10

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Re: Trigger Happy with the Flap Disc
« Reply #12 on: May 12, 2022, 02:29:04 PM »
Update*

I have not been able to restore the roundness of the tube frame. I don't know what to do at this point. Do I smother JB Steel stick on the spots and then try to shape it, I just don't know.

If I just take it to be powdercoated, can I just tell them there's wavy spots and to go heavier in those areas? Is there such a thing as buildable or self-leveling powdercoat kinda like there is for primer?
.I'm at a loss here and it's put a stop on my build.

Wow, looks like a frame I'm working on. Mine just not quite that bad. I'm wondering what  to do too.

The places that will be hidden by the tank or othe things, I ain't gonna worry about those areas. Places exposed, maybe bondo, not sure, gonna give it a try.

If the frame wasn't going to be powdercoated then I would try bondo.

Besides the frame at the shock mount looks weak (holes?) besides being thin and not round.
Or get a donor frame and cut and paste.....

I didn't do the best job of welding, but I had it redone by my brother and everything looks right now, the way it should.

There's always textured powder coat options.  That will blend the entire frame into a hand hammered look.

Would be unique for sure.

I'm going to write this down for later. Definitely would like to see my options and what it could possibly look like. Thanks!

Have you tried to file it out and then sand?

I have and the waves just won't round themselves out unfortunately.

  Dude, you gotta stop doing that. There's no magic fix for that. Sorry.

Ugh, I know Don, I'm trying! Haha, when my brother came over to help fix the gussets he said he'd come back next week and I think he's going to just pool weld then help me sand down those top rails so they're straight and even. He's a welder out in Wyoming.
« Last Edit: May 12, 2022, 02:32:20 PM by Ellz10 »
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Offline WhyNot2

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Re: Trigger Happy with the Flap Disc
« Reply #13 on: May 13, 2022, 04:48:34 AM »
So, did you come up with a solution?

Lets see some pics?

Still working on mine, just spraying it down with paint remover, then gently grinding off the things I don't won't.
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If it sounds like I know what I'm talking about, it's because I cut and pasted from someone else.

Offline Ellz10

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Re: Trigger Happy with the Flap Disc
« Reply #14 on: May 13, 2022, 07:57:20 AM »
So, did you come up with a solution?

Lets see some pics?

Still working on mine, just spraying it down with paint remover, then gently grinding off the things I don't won't.

I did! My brother is going to come over next week before he goes back home to Wyoming and I believe weld a pool at the wavy spots then help me sand/file down properly so it's nice and straight and even! I'll post some pics of the during and finished result! Wish us luck!
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Offline calj737

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Re: Trigger Happy with the Flap Disc
« Reply #15 on: May 13, 2022, 11:16:33 AM »
Your brother (and you) would be well served to use Silicon Bronze filler to build up those thinned areas. It takes less heat to melt, is softer to sand smooth, and will take powder coat. The downside potential of using steel filler is you compromise the wall thickness due to internal rust as you try to weld and end up with a bigger mess than you started with. Plus, you’re heating the tubing in small areas and changing the strength of the tube in particular spots, not evenly.

A 3/32 filler wire and a TIG torch work a treat. Won’t need much more than 45 amps to do the job properly. (The tubing is only 0.063 wall thickness anyway).
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Offline Ellz10

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Re: Trigger Happy with the Flap Disc
« Reply #16 on: May 13, 2022, 03:09:51 PM »
Your brother (and you) would be well served to use Silicon Bronze filler to build up those thinned areas. It takes less heat to melt, is softer to sand smooth, and will take powder coat. The downside potential of using steel filler is you compromise the wall thickness due to internal rust as you try to weld and end up with a bigger mess than you started with. Plus, you’re heating the tubing in small areas and changing the strength of the tube in particular spots, not evenly.

A 3/32 filler wire and a TIG torch work a treat. Won’t need much more than 45 amps to do the job properly. (The tubing is only 0.063 wall thickness anyway).

He hasn't been welding nearly as long as you, nor as well I would imagine, but he's been at his job for 7 years so I would hope he's decent enough but I will definitely show him what you said so he can use it exactly. Thanks Cal!
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Offline Trevor from Warragul

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Re: Trigger Happy with the Flap Disc
« Reply #17 on: May 14, 2022, 03:36:31 AM »
JB Weld can be powder coated.
« Last Edit: May 14, 2022, 03:39:19 AM by Trevor from Warragul »
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Offline WhyNot2

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Re: Trigger Happy with the Flap Disc
« Reply #18 on: May 14, 2022, 05:43:50 AM »
JB Weld can be powder coated.

I'll make note if this, for future reference.
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Offline Trevor from Warragul

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Re: Trigger Happy with the Flap Disc
« Reply #19 on: May 14, 2022, 07:07:57 AM »
1971 Kawasaki H1A
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1976 Moto Morini 3 1/2 Sport
1978 Honda CBX
1997 Suzuki Bandit 1200
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Offline Ellz10

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Re: Trigger Happy with the Flap Disc
« Reply #20 on: May 14, 2022, 07:17:43 PM »

Thank you for that clip, I actually enjoy watching those types of videos and the powdercoat turned out amazing!
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