Rear shock wiggle


9 replies to this topic
  • 426 NOOB

Posted February 11, 2009 - 07:28 PM

#1

Ok, I searched around a bit but want to be sure. 01 426. When on the stand and rear wheel is unloaded, I can grab the wheel and pull up on it. the swing arm moves up about an inch before it sees resistance from the shock. Is this too much? There is no side to side movement. Just up and down. Also i noticed when pulling up on it, and standing facing nitrogen reservoir, if I grab the nitrogen reservoir, I can wiggle it left to right a bit. Is this normal?

  • grayracer513

Posted February 11, 2009 - 08:41 PM

#2

The rotational movement is OK. The shock is hung on spherical bearings.

But an inch of vertical at the the axle is quite excessive. Have someone move the swing arm while you feel each pivot point to detect where the movement is. Be sure to check the vertical motion at the top shock pivot as well.

  • 426 NOOB

Posted February 11, 2009 - 08:45 PM

#3

thanks, for the reply, I will have my dad pull up on wheel, and will get back to you

  • 426 NOOB

Posted February 11, 2009 - 09:34 PM

#4

Ok, good news, I once again live up to my noob name. I guestimated how much slop up and down the linkage moved. When I measured with a tape the up/down movement was about a quarter inch give or take a hair. I guess that backs up the old saying that looks are decieving. So about how much is normal Gray?

  • grayracer513

Posted February 12, 2009 - 07:45 AM

#5

If all of that was the result of looseness at a single pivot point or two, it might be problematic. If it's a total of all the clearance at the whole rear linkage, it's not so bad. What you see at the axle is roughly 3 times what there is at the linkage. Still, you should check it out and see where it's coming from. Shock bearings are the most likely culprit.

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  • 426 NOOB

Posted February 12, 2009 - 08:29 AM

#6

it looks to me like it was coming from the top bushing under the seat and the lower one, where the bottom of the shock bolts up. The other places looked pretty solid.

  • grayracer513

Posted February 12, 2009 - 09:35 AM

#7

Shock bearings. They tend to have a little slack in them as it is, but if it seems excessive, replace them.

  • 426 NOOB

Posted February 12, 2009 - 09:40 AM

#8

okay, thanks gray, like I said the axle only moves up about 1/4 inch and between the two bearings, from what I have read is not that bad, but I will tear it down and replace them very soon.

  • 426 NOOB

Posted February 12, 2009 - 09:42 AM

#9

okay, thanks gray, like I said the axle only moves up about 1/4 inch and between the two bearings, from what I have read is not that bad, but I will tear it down and replace them very soon.
PS: the book says that they are pressed in. Will I need to have them pressed out by a shop or are they under a small load, enough to where they can be replaced at home?

  • grayracer513

Posted February 12, 2009 - 11:54 AM

#10

You can probably do them yourself, but it may be worth the small price it should cost to carry your shock in and have it done.





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