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Author Topic: Balance shaft on KTM LC640 question  (Read 367 times)

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Offline Amsterdam

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Balance shaft on KTM LC640 question
« on: October 17, 2016, 07:39:27 pm »
A friend of mine is trying to fix his son's bike.  It sounded like a big end bearing rattling but on stripping he found some play on the balancer shaft.  The video shows the play on the shaft but of course with the cover removed the shaft is only supported on one side.  However, this does not look right to me.  Is there anyone here who knows if this is a normal amount of play?

I don't know how to embed the video so I uploaded it to Youtube, sorry.

https://youtu.be/7sHLZ3JCxsg

KTM 500 XCW, Husqvarna 701, KTM 1190 Adventure
 

Offline Amsterdam

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Re: Balance shaft on KTM LC640 question
« Reply #1 on: October 18, 2016, 12:23:35 pm »
Surely one of you technical experts has come across this before?  Maybe I can get more comments by renaming this thread "Why KTM is better than a BMW but not as good as a Yamaha"?
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Offline Amsterdam

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Re: Balance shaft on KTM LC640 question
« Reply #2 on: November 07, 2016, 02:37:06 pm »
The bearings of the balancer shaft were replaced.  This eliminated the free-play and got rid of the noise.  As I said in the first post, it sounded like a big end bearing failure so if your  bike has that noise don't immediately despair.  These bearings are easy to get at and you don't have to strip too much.
KTM 500 XCW, Husqvarna 701, KTM 1190 Adventure
 

Offline Sprocketbek

Re: Balance shaft on KTM LC640 question
« Reply #3 on: November 07, 2016, 04:10:08 pm »
Good!
Thanks for the info  :thumleft:
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