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Old 10-23-2013, 07:42 PM   #16
Dave in Wi
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Quote:
Originally Posted by ZEmann View Post
the PO was a Moron can u imagine passenger pegs on a swing arm
Take a look at some old-school bikes, that's where they used to mount them

On the holes.... It probably wouldn't hurt anything to ride it the way it is. But it would bug the sh*t out of me, and I'd always be wondering what other hillbilly engineering the PO did.
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Old 10-23-2013, 07:47 PM   #17
larryboy
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Quote:
Originally Posted by Dave in Wi View Post
Take a look at some old-school bikes, that's where they used to mount them

Or a brand new Harley.
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Old 10-23-2013, 07:47 PM   #18
kubiak
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i had a few honda xl 600s that had factory pass pegs on the swingarm. they were weird when you are on the back!
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Old 10-23-2013, 07:50 PM   #19
*Gmoney*
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Quote:
Originally Posted by Dave in Wi View Post
Take a look at some old-school bikes, that's where they used to mount them
I have at least 2 old bikes with foot pegs on the swing arm,
and once you put a passenger on it was overweight, and did go that far up/down. That was why the Feds said.
Strap on seat, or hand grip installed from factory, a place for un-sprung weight to hold on.
Strap on seat, hand grips or G-strings, its all still bike porn.
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Old 10-23-2013, 07:52 PM   #20
mcma111
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It's a steel swing arm. You could Swiss cheese it and not have a problem.
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Old 10-23-2013, 08:08 PM   #21
mikesova OP
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Originally Posted by mcma111 View Post
It's a steel swing arm. You could Swiss cheese it and not have a problem.
aluminum.
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Old 10-24-2013, 01:23 AM   #22
Beezer
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I'd plug em to keep them from filling up with water. wouldn't worry about the strength
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Old 10-24-2013, 02:19 AM   #23
jules083
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Quote:
Originally Posted by ZEmann View Post
the PO was a Moron can u imagine passenger pegs on a swing arm
Both of my sportsters, late 90's models, and my 2013 dyna have passenger pegs on the swingarm. I rode on the back of a friend's sportster with swingarm pegs when I had a breakdown once, it wasn't bad at all.

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Old 10-24-2013, 02:42 AM   #24
stainlesscycle
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Quote:
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I'd plug em to keep them from filling up with water. wouldn't worry about the strength
drill some small drain holes in the bottom - if they're not already there...
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Old 10-24-2013, 04:35 AM   #25
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I'd plug em to keep them from filling up with water. wouldn't worry about the strength
JB weld and thread a short bolt in there.
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Old 10-24-2013, 05:05 AM   #26
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I welded up a swingarm for a buddy who had a DR250 or something. Aluminum. The kickstand had worn a hole, actually a long trough, 5 times bigger than that hole. No issues.





Personally I wouldn't worry about it. If it ever does crack, I'd buy one on ebay, change out the bearings and ride on.
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Old 10-24-2013, 06:27 AM   #27
Mgbgt89
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Quote:
Originally Posted by tonusmaximus View Post
I was teaching GF to ride an '82 SP250 with pegs stock on the swingarm and as soon as she took off and my feet started folowing the bumps I freaked a bit! Whoa thats a bad design!

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I think its a great design. Just yell to your passenger to give you some extra rear preload for the rough stuff. Works great.
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Old 10-24-2013, 06:37 AM   #28
LuciferMutt
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It will be fine. Small round holes do very little to the integrity of straight bars under relatively minor loads.

Would it be better without it? Sure. The truth is, though, most of us will never come close to the structural limits of a part like that during the lifetime of the motorcycle. Almost guaranteed that something else is going to fail before the swingarm does.

Tapping it and putting a bolt in it is going to do absolutely nothing to help the integrity and will likely make it worse since the threads are now creating stress risers in the material (ie places for cracks to start).

Welding in a sleeve? Unless you are really good at welding aluminum properly, and most people aren't, you are going to make it worse than it is now.
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Old 10-24-2013, 06:45 AM   #29
WebGringo
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JB weld is your friend. Make a note when you buy it, bitch about it, but at the end of the day JB fixes that in 10 minutes.
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Old 10-24-2013, 07:09 AM   #30
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Not and issue

Think of a swing arm as a steel floor or ceiling joist. A box tube with a hole in the side will not effect a load applied in a vertical direction. Joist get their strength from the top and bottom straps hooked together by "x" braces with it being mostly open from the sides. A round hole will not create a stress riser and I wouldn't think twice about it being a safety issue. Put a plastic grommet plug in it to keep out dirt and water and ride it! Just an honest opinion from a deg. engineer.
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