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Old 04-22-2015, 07:06 PM   #1
sacrider OP
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Joined: Jul 2008
Location: Northern Cal
Oddometer: 78
KTM LC4 engine longevity question

Hey guys and gals, I'm looking to buy a newer KTM to upgrade from my 1995 620. Ideally I'd like to get a 625 SM (I think they were made from 03-06, but not certain).

I see alot of 625s and 640s advertised with under 15k miles, but with "engine fully rebuilt 1500 miles ago".

Its my understanding that these motors are supposed to be bulletproof. I know my old 620 just keeps going and going.

Is it just the weak main bearing that is causing motors to be rebuilt with less then 20k miles, or are there more issues? I haven't asked any sellers what happened, since I'm still kinda lurking in the craiglist ads.

Is there a way to check the main bearing before buying a LC4?

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Old 04-22-2015, 07:31 PM   #2
Big Bike, Slow Rider
Joined: Jun 2008
Location: Frankston, Australia
Oddometer: 852
Somebody will correct me if I am wrong, but AFAIK the main bearing was only an issue on pre-03 motors.

My 2005 640 has 64,000 km on it. A top end rebuild was required at 31,500 kms but it was my own fault (stupidity).

ClintNZ and Gunnabuck (both inmates) have over 100,000 on their engines.

2005 KTM 640A
2008 Wee-Strom
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Old 04-22-2015, 08:00 PM   #3
Verbal tactician
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Joined: Sep 2007
Location: central Mn
Oddometer: 11,404
I have 52k miles on my 05 640 Adventure. The cam follower and cam bearings were just replaced. The original owner did those at 25k also. It does not use any oil and is very easy to start.

I bought mine because it had high miles, looked to be in fantastic condition and was very inexpensive. I had to get over the feeling that with the miles, it was fragile. Looking forward to a fun summer of dual sport riding.
all around good guy
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