Front End wobble - Page 4

ponch · 10-01-2014, 04:27 PM

Quote:

Originally Posted by Silent Sam

"GYROSCOPIC-PROCESSION" take place 90 degrees to the rear of the direction of rotation

It how helicopters are controlled...and is a real bitch in rotating parts/assembly's, if there is any slack that can be "fed-into" the equation. (study it on Wikipedia)

Considering the mass of the front wheel assy..if it starts any erratic movement in any plane..it can/will set up a wobble...sometime escalating to uncontrollable !

In the case of the Big Assed Kawasaki's..it seems to be limited to around a forward speed of 30 - 40 mph..

(I feel pretty -educated, right now..so I need a good come-uppence, and a reply by one of you rotateing mass engineers to correct my ramblings)

Some might call that porpoising.

redjay · 10-01-2014, 04:36 PM

Quote:

Originally Posted by ponch

But you had a 1600, not a 1700. Anyway, it tapered rollers are better and cure it, you have to wonder why they weren't used in the first place. It's real cheap to skimp on something like that.

I doubt the Japanese testers ever checked if the bikes front end would wobble if you took both hands off the bars. I guess they figured you would always have at least one hand on the bars

**Rasta** · 10-01-2014, 04:40 PM

Quote:

Originally Posted by ponch

But you had a 1600, not a 1700. Anyway, it tapered rollers are better and cure it, you have to wonder why they weren't used in the first place. It's real cheap to skimp on something like that.

In my case I have a 1500 and I didn't change the bearing.....I tightened what came with the bike and that has worked for me.

ponch · 10-01-2014, 06:56 PM

Quote:

Originally Posted by redjay

I doubt the Japanese testers ever checked if the bikes front end would wobble if you took both hands off the bars. I guess they figured you would always have at least one hand on the bars

there have been instances where they didn't grease bearings and splines. I guess anything to save a buck.

ponch · 10-01-2014, 06:58 PM

Quote:

Originally Posted by Rasta

In my case I have a 1500 and I didn't change the bearing.....I tightened what came with the bike and that has worked for me.

Mine was never lose. Some people experience that. It's probably a good idea to pull the forks off and get the bearing done right with a synthetic grease.

seawolf · 10-01-2014, 11:22 PM

So bike (Voyager 2013) is in for 24k km's service at dealer. Inspection found triple tree bears past acceptable wear. Is this a warranty issue? I believe it should be covered. 24000 km's is nothing in my opinion. Advice?

seawolf · 10-01-2014, 11:24 PM

By the way the last 10000 km's I found that I could rarely take my hands off the handle bars as it would wobble badly.

ponch · 10-01-2014, 11:28 PM

I would think steering stem bearings would be covered under warranty.

bouson · 10-01-2014, 11:34 PM

Quote:

Originally Posted by Win_surfur

I had this wobble once too. Well, the bike had it, not me personally...anywho...it turned out to be a tire pressure issue, it was underinflated. Added air to the proper pressure, and the wobble stopped.

I've had a few wobbles myself over the years, but it had nothing to do with my air pressure ;)

Same here I have been riding with no wobble all summer. Rode home one night about 5 miles of the ride hands free. Temperature dropped over night about 30 degrees cooler then normal and I got a wobble. Checked the pressure and was under 20 pounds (I run 30 lbs normally). Aired it up to normal and no wobble at any speed.

recumbentbob · 10-02-2014, 07:24 PM

I can't believe how low air pressure some people run in their tires on big heavy bikes.

ctc6698 · 10-02-2014, 08:56 PM

Maybe different issue but hoping someone has some insight. I dont have a wobble and can ride with no hands at times...til I come to my senses.

My 11 Vaq. has a bad vibration in the front end at lower speeds when I lean into left and right turns such as on mountain roads. When I straighten up, the vibration goes away. Any ideas?

redjay · 10-02-2014, 08:58 PM

Tires are cupped/scalloped.

ctc6698 · 10-02-2014, 09:04 PM

Quote:

Originally Posted by redjay

Tires are cupped/scalloped.

dont appear to be....original with 6100 mls....but I have looked hard at it. felt for hot bearings, hubs, rotors but nothing stands out

recumbentbob · 10-02-2014, 09:21 PM

Tires.
How many miles on your tires and what pressure do you run?

Silent Sam · 10-02-2014, 11:18 PM

When my -rear, Brazilian Mfg- Metzler ME 880 was coming loose from the carcass..It "Looked Normal", til I looked closely, down into the tread groves, and saw the cracks...

It would sound like I was riding on "diamond plate" in the curves !

10-01-2014, 11:22 PM	#51
seawolf Member Join Date: Feb 2008 Location: Stony Plain, Alberta Posts: 153	So bike (Voyager 2013) is in for 24k km's service at dealer. Inspection found triple tree bears past acceptable wear. Is this a warranty issue? I believe it should be covered. 24000 km's is nothing in my opinion. Advice? __________________ John 1964 305 super hawk 1985 500 Shawdow 2006 900 Kawa Classic 2007 1600 Nomad 2013 Voyager
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10-01-2014, 11:24 PM	#52
seawolf Member Join Date: Feb 2008 Location: Stony Plain, Alberta Posts: 153	By the way the last 10000 km's I found that I could rarely take my hands off the handle bars as it would wobble badly. __________________ John 1964 305 super hawk 1985 500 Shawdow 2006 900 Kawa Classic 2007 1600 Nomad 2013 Voyager
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10-01-2014, 11:28 PM	#53
ponch Sr. Contributor Join Date: Nov 2007 Location: Way East Valley Posts: 12,014	I would think steering stem bearings would be covered under warranty. __________________ Ponch VBA 0019 VROC 8109-R BMWMOA 162849 BMWRA 41335 BMW: When you care enough to ride the very best. My Motorrad Blog My Motorrad YouTube 2009 BMW R1200RT Previous bikes:2007 Nomad \| 2001 Vulcan 800 Classic \| 1984 GPz750 \| 1978 KZ1000A2 Rallies: Custer '09\|Prairie Du Chien '10\|Crescent City '11
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10-02-2014, 07:24 PM	#55
recumbentbob Sr. Member Join Date: Mar 2009 Location: Newburgh IN Posts: 3,404	I can't believe how low air pressure some people run in their tires on big heavy bikes. __________________ VBA #01084 "A well regulated militia being necessary to the security of a free State, the right of the People to keep and bear arms shall not be infringed."
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10-02-2014, 09:21 PM	#59
recumbentbob Sr. Member Join Date: Mar 2009 Location: Newburgh IN Posts: 3,404	Tires. How many miles on your tires and what pressure do you run? __________________ VBA #01084 "A well regulated militia being necessary to the security of a free State, the right of the People to keep and bear arms shall not be infringed."
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10-02-2014, 08:56 PM	#56
ctc6698 Member Join Date: Oct 2013 Location: Kings Mtn, NC Posts: 114	Maybe different issue but hoping someone has some insight. I dont have a wobble and can ride with no hands at times...til I come to my senses. My 11 Vaq. has a bad vibration in the front end at lower speeds when I lean into left and right turns such as on mountain roads. When I straighten up, the vibration goes away. Any ideas?
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10-02-2014, 08:58 PM	#57
redjay Top Contributor Join Date: Feb 2008 Location: Ontario Posts: 6,930	Tires are cupped/scalloped.
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10-02-2014, 11:18 PM	#60
Silent Sam Sr. Member Join Date: Sep 2013 Location: On The Shakey Side Posts: 2,501	When my -rear, Brazilian Mfg- Metzler ME 880 was coming loose from the carcass..It "Looked Normal", til I looked closely, down into the tread groves, and saw the cracks... It would sound like I was riding on "diamond plate" in the curves !
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