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Steve H

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Re: Wobble?
Reply #15 - 01/03/16 at 08:08:33

You did notice that at one point in the video, he said the slow mo showed the front forks moving independently of each other.

That's a good reason to fix your forks. Might also be an indication that a fork brace is in order. It will stiffen and help to lock the 2 sides together.

Worn rear, new front was also mentioned as a problem as you pointed out.

Back in those days, they had done very little study of wind turbulence on bikes and how it affects the ride. Honda was the first I know of to really study it when they came out with the factory faired Goldwing models.

The wind being turbulent may also be a factor. Lying down on the bike will smooth the airflow as well as change the weight distribution. I have nothing to support this supposition though other than they said tail boxes and panniers could exacerbate the condition.

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87 LS650, 2005 Ninja 250, 2009 Yamaha C3, 2001 Honda Reflex. On 2 wheels since 6/80.

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chzeckmate

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Re: Wobble?
Reply #16 - 01/03/16 at 08:20:07

Serowbot wrote on 01/03/16 at 08:07:08:

A backpack will likely make things worse...
You'll notice the box on back in the video did...
Weight must go forward...

Either way it's fine. If it gets better or worse still goes to demonstrate the issue in the video. As for the amount of weight, go up incrementally until you get a result. If you don't get a noticeable difference then you're back to fix the forks and possibly select a different set of tires. Process of elimination.

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'05 S40, dyna muffler, rejet, high flow filter, Mobil 1 Racing 4T, Shinko 230 set with 140/90 rear, raptor, seat lift, LED running lights/signals, tach, reversed risers, homemade MR10 Lexan windscreen

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pg Serious Thumper Offline Posts: 5273 In Transit	Re: Wobble? Reply #17 - 01/03/16 at 14:07:40 I had a horrible wobble at about 55 mph and a T-Kat fork brace did wonders for me, I highly recommend it. Best regards,
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gizzo

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Re: Wobble?
Reply #18 - 01/03/16 at 14:43:06

chzeckmate wrote on 01/03/16 at 08:20:07:

Either way it's fine. If it gets better or worse still goes to demonstrate the issue in the video. As for the amount of weight, go up incrementally until you get a result. If you don't get a noticeable difference then you're back to fix the forks and possibly select a different set of tires. Process of elimination.

^This.
Some tyres just don't get along with each other, especially when they start wearing out and become squared off.ie: My Ducati hated the Pirelli Phantom rear, Bridgestone Spitfire front combo. A new Battleaxe on the back fixed it. I believe the old airhead BMW's suffered, too. Maybe check your tyre pressures, too. The only time my Cabbage ever shook it's head was when I had 15 psi in the back.
Could be the road, too. Some grooves or tar snakes making it tramline?

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cheapnewb24 Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1373 Virginia Gender:	Re: Wobble? Reply #19 - 01/04/16 at 09:19:55 Maybe this is why they say hard-mounted Sportsters handle better? https://www.youtube.com/watch?v=yvDI2dmzDEA Can anyone tell me how to imbed YT videos?
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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28663 Tucson Az Gender:	Re: Wobble? Reply #20 - 01/04/16 at 09:54:38 https://www.youtube.com/watch?v=yvDI2dmzDEA Select, "insert Media" icon... Paste URL... cut the "s" from "https" in the url... Code: [media]http://www.youtube.com/watch?v=yvDI2dmzDEA[/media]
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cheapnewb24 Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1373 Virginia Gender:	Re: Wobble? Reply #21 - 01/04/16 at 09:59:13 cheapnewb24 wrote on 01/04/16 at 09:19:55: Maybe this is why they say hard-mounted Sportsters handle better? https://www.youtube.com/watch?v=yvDI2dmzDEA Can anyone tell me how to imbed YT videos? Okay, Got it! My first YouTube imbed anywhere, I think.
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cheapnewb24 Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1373 Virginia Gender:	Re: Wobble? Reply #22 - 01/04/16 at 18:44:26 No one finds this interesting?
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Art Webb

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Re: Wobble?
Reply #23 - 01/05/16 at 09:00:15

That's a Dyna, not a Sporty
I know of very few people who claim a hardtail handles better. and those who do usually base that on 'feels' rather than empirical evidence
In racing, they spend thousands of $ lowering the weight of a bike by 2lb in the name of speed
Do you know how much a suspension weighs over a hardtail?
And yet no race bikes run hardtail frames
Interesting, no?

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chzeckmate

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Re: Wobble?
Reply #24 - 01/05/16 at 11:42:19

Art Webb wrote on 01/05/16 at 09:00:15:

That's a Dyna, not a Sporty
I know of very few people who claim a hardtail handles better. and those who do usually base that on 'feels' rather than empirical evidence
In racing, they spend thousands of $ lowering the weight of a bike by 2lb in the name of speed
Do you know how much a suspension weighs over a hardtail?
And yet no race bikes run hardtail frames
Interesting, no?

Well said.

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'05 S40, dyna muffler, rejet, high flow filter, Mobil 1 Racing 4T, Shinko 230 set with 140/90 rear, raptor, seat lift, LED running lights/signals, tach, reversed risers, homemade MR10 Lexan windscreen

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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18099 Camp Springs, Kentucky Gender:	Re: Wobble? Reply #25 - 01/05/16 at 13:46:30 cheapnewb24 wrote on 01/04/16 at 18:44:26: No one finds this interesting? I really don't care if a DYNA wobbles.....I most likely will never own one.
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cheapnewb24 Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1373 Virginia Gender:	Re: Wobble? Reply #26 - 01/05/16 at 18:11:01 Uhh...I was talking about a solidly mounted ENGINE vs rubber-mounted ENGINE, not suspension.
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verslagen1

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Re: Wobble?
Reply #27 - 01/05/16 at 19:43:42

cheapnewb24 wrote on 01/05/16 at 18:11:01:

Uhh...I was talking about a solidly mounted ENGINE vs rubber-mounted ENGINE, not suspension.

Undecided

cheapy, nobody knows what you're talking about.

cheapnewb24 wrote on 01/04/16 at 09:19:55:

Maybe this is why they say hard-mounted Sportsters handle better? Huh

cheapnewb24 wrote on 01/05/16 at 18:11:01:

Uhh...I was talking about a solidly mounted ENGINE vs rubber-mounted ENGINE, not suspension.
Undecided

when you don't explain yourself.

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cheapnewb24 Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1373 Virginia Gender:	Re: Wobble? Reply #28 - 01/05/16 at 20:38:38 Yeah, I guess I kinda made an ASSumption there.
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Dave

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Re: Wobble?
Reply #29 - 01/06/16 at 06:11:51

cheapnewb24 wrote on 01/05/16 at 18:11:01:

Uhh...I was talking about a solidly mounted ENGINE vs rubber-mounted ENGINE, not suspension.

Undecided

Well it seems that Harley mounted the DYNA engine/transmission in rubber to soak up the vibration - then attached the swing arm pivot point to the transmission case. As a result the swing arm is not all that rigid and can flex around a bit. (Still doesn't bother me.....as I won't ever own one).

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