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Sep 25th 2016, 08:49 AM   #1
 no splat matt's Avatar
 
  Jan 2016
  Beaverton

  With a grin on my face
KTM LC4 640, known issues?

I'm gonna be checking out a 2000 KTM LC4 640. Looking for info on any known problem areas I should be on the look out for. I know the main drive shaft bearing had been a problem, and I know the rocker arm roller bearings - especially the intake - can be an issue. Any other problematic areas specific to this bike I should be on the lookout for?
Sep 25th 2016, 02:55 PM   #2
 TimberMoto's Avatar
 
  Jan 2016
  Salem, Oregon

  2001 Gsxr 600
Don't personally have any exp with the bike, but this thread has a lot of good info.

http://advrider.com/index.php?thread...thread.140701/

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Sep 25th 2016, 06:07 PM   #3
 dragracer1951's Avatar
Moderator
 
  Jan 2016
  Bremerton

  07 XB12 Buell Lightning
I had an 05 625smc. Same motor.
Rockers and output shaft bearings.
Replaced them on mine...
Sep 25th 2016, 08:13 PM   #4
 no splat matt's Avatar
 
  Jan 2016
  Beaverton

  With a grin on my face
Quote:
Originally Posted by dragracer1951 View Post
I had an 05 625smc. Same motor.
Rockers and output shaft bearings.
Replaced them on mine...
That seems to be the consensus on the various websites I've been visiting. The shaft bearing replacement looks pretty easy. The rocker arm roller bearings look a bit more involved. Isn't that what winter is for? Hope the rest of the bike looks good!
Sep 25th 2016, 08:56 PM   #5
 dragracer1951's Avatar
Moderator
 
  Jan 2016
  Bremerton

  07 XB12 Buell Lightning
The roller rockers are easy
The output bearing requires you to split the cases
Sep 26th 2016, 09:03 PM   #6
 no splat matt's Avatar
 
  Jan 2016
  Beaverton

  With a grin on my face
Quote:
Originally Posted by dragracer1951 View Post
The roller rockers are easy
The output bearing requires you to split the cases
Looks like I have to re-look at the output bearing job. I thought I could get by just dealing with the sprocket side. It will be a whole new experience dealing with the clutch side since I haven't taken one apart before. I hope this has been done already, but nothing ventured, nothing gained.
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