Weird front sprocket wear


9 replies to this topic
  • bigl

Posted August 18, 2015 - 08:49 PM

#1

Hi

 

I managed to wear out a front sprocket in +/- 600km.  This seems very excessive even though I like caning the bike - 05 WR450.

 

This sprocket looks to have the same wear as the set I replaced.  The inside, motor side of the sprocket is very deeply worn, while the outside looks fine.  I checked to see if there are any shim washers in the manual, but see none. ( In case the rear is slightly offset. )

 

I also replaced the chain adjuster blocks after the last chain set.  The chain looks straight when fitted.

 

Any ideas?

 

p.s.  I should have taken photos, I know :banghead:



  • GuyGraham

Posted August 18, 2015 - 11:08 PM

#2

Sounds like chain alignment is out possibly due to rear wheel alignment.
I get 3k miles out of front sprockets and thats all off road use

Edited by GuyGraham, August 18, 2015 - 11:09 PM.


  • bigl

Posted August 19, 2015 - 03:09 AM

#3

Sounds like chain alignment is out possibly due to rear wheel alignment.
I get 3k miles out of front sprockets and thats all off road use

So no front sprocket spacer.  Dang.  Does that mean the swing arm is bent or should I find a better way of checking the rear wheel alignment?



  • Krannie McKranface

Posted August 19, 2015 - 05:27 AM

#4

motion pro chain sight alignment tool



  • bigl

Posted August 19, 2015 - 08:18 PM

#5

motion pro chain sight alignment tool

Thanks.  I am checking it out.



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  • jsantapau

Posted August 21, 2015 - 04:34 AM

#6

if you have two different colored wheel spacers check to see if they are not on t wrong side

  • bigl

Posted August 21, 2015 - 11:05 PM

#7

if you have two different colored wheel spacers check to see if they are not on t wrong side

I am not to sure what you are referring to?



  • Krannie McKranface

Posted August 22, 2015 - 05:24 AM

#8

I am not to sure what you are referring to?

He's talking about the rear wheel spacers. 



  • bigl

Posted August 23, 2015 - 07:42 PM

#9

I thought so, but the parts fiche shows the same part number both sides.

 

I dug through the scrap metal to get the sprocket to show to a buddy.  I found another friends VTR1000 front sprocket from a set I helped replace a while back.  It had the same one sided wear pattern.  i am now thinking it must have something to do with the torque effect.



  • still2smokin

Posted August 23, 2015 - 08:04 PM

#10

Maybe also check your swing arm bearings .






 
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