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Title: swing arm bearings
Post by: iain on November 26, 2011, 08:57:21 PM

Hi Guys,
I'm having problems with getting rid of swing arm movement, my bearings are only about 3 to 4 thousand Ks old. I have put slightly bigger thrust washers as per the manual and I still have movement. As you guys know, when you have the back end deciding to steer itself it doesn't make for pleasant riding. I would be grateful if some one could give me suggestions on how to eliminate this problem.
Iain
NZ

Title: Re: swing arm bearings
Post by: Re-Vision on November 26, 2011, 10:31:27 PM

Have you inspected the swing arm and frame for damage around the pivot shaft? Are you pretty sure that your rear wheel steer is caused by thrust bearing assembly rather than rear axle bearings? Dumb questions I suppose but there doesn't appear to be a whole lot of things that would cause your problem. Got a parts bike? BDC

Title: Re: swing arm bearings
Post by: RedBaron on December 13, 2011, 05:09:47 AM

Did you get that worked out? Is this the same bike you had trouble getting the swing arm out of for powder coating?

RB

Title: Re: swing arm bearings
Post by: jasonm. on December 13, 2011, 05:12:12 PM

the Yamaha manual is clear about taking measurements before getting thrust washers. ALSO the bearing races MUST be fully seated in the FRAME. Yamaha was not big on setting them in as far as needed. Often they stick out a slight bit, sometimes from the thrust washers rubbing on the frame.

Title: Re: swing arm bearings
Post by: The Prophet of Doom on December 14, 2011, 03:16:54 AM

Are you sure it's not frame flex?
My bearings are tighter than a Carmelite nun, but put the bike on its main stand and the rear wheel can move at least 1cm either way. At least 1/2 that seems to be the main stand flexing.

Title: Re: swing arm bearings
Post by: jasonm. on December 14, 2011, 08:26:12 AM

Quote from: roro on December 14, 2011, 03:16:54 AM
Are you sure it's not frame flex?
My bearings are tighter than a Carmelite nun, but put the bike on its main stand and the rear wheel can move at least 1cm either way. At least 1/2 that seems to be the main stand flexing.

I have had 4 Visions. My '83 had since '93. None had that type of play. Play is checked while lightly pushing/pulling side to side. Roro...something is wrong with your bike...loose.

Title: Re: swing arm bearings
Post by: Night Vision on December 14, 2011, 08:57:18 PM

your rear end is definitely loose

(http://www.simbolic.co.nz/prototype/media/avatar.gif)

Title: Re: swing arm bearings
Post by: Re-Vision on December 14, 2011, 09:08:27 PM

Looks like really smooth roller bearings with a little frame flex to me. Looks safe to ride. BDC

Title: Re: swing arm bearings
Post by: iain on December 15, 2011, 12:28:29 AM

The reason she's got frame flex is that she has been ridden to often
Iain
NZ

Riders Of Vision

General => TechTalk => Topic started by: iain on November 26, 2011, 08:57:21 PM