Thanks Laromonster.

Hi;
I have a problem about KTM Service in Turkey. Is there any contact e-mail in KTM Headquarters Austria?

Thanks

I've got 14k miles on my LC4, and have had 2 problems, first had a kill switch short out a certain RPMs when accelerating the bike, causing the bike to act like it was a fueling issue. I just unplugged the switch until I replaced it with a new one, easy fix. And now I've got a hole in the top of my motor.

Mine's an 03 640 Enduro, I've maintained her more or less by the book & she's been pretty good. Apart from the usual consumables of chains, sprockets, wheel bearings, brake pads, suspension servicing etc here's my list:

Countershaft seal @ about 12 000 km (they musta had a bad batch as the replacement is still going strong)

Re-sealed the seeping cam cover @ 20 000 km, Use good goo & there'll be no more problems.

At 45 000 km the intake valve clearance seemed to be opening up a touch so going off Jerome's recommendation I stripped the head at the 50 000 km mark & found that the intake cam follower roller was indeed showing signs of wear. Replaced that, all the other bearings in the head & the timing chain. The other bearings & the timing chain all seemed to be in good shape but the parts weren't too expensive so they got done.

5/2009 update: At 75 000 km now, (47 000 miles) & she's still going strong. From my experience I would rate the KTM 640 as a very well made reliable bike. And it goes fast!

6/2010 update: At 90 000 km now, (56 000 miles) she's still never let me down. Gave the carb a rebuild at 80K km as it was getting well worn. Also welded up a crack in the subframe & reinforced it. Keep a eye on the rear of the tool case mount tube, this seems to be a common failure point. Mine did a serious amount of loaded up, high speed, rough road hooning before it cracked though. Did another countershaft seal too to fix a slight seep.

I think I'll give the ol girl a rebuild at 100 000 km if she needs it or not. Cheap fun in my book.



Cheers
Clint

edit doesn't seem to be working...

I forgot to add the starter sprag clutch which I replaced at 50 000 km also. A simple job if you have the right puller, & not very mission critical anyway as the beast is fairly easy to kickstart once you have the knack.

Cheers
Clint

It's been almost 2 years since my last update so I guess it's time..... I've gone through 2 riding seasons with very little problems from the bike but late last fall another one crept in....

Nearing the 85,000 KM mark my bike developed quite a coolant leak into the combustion chamber so I pulled the top end and found a faulty head gasket.... While I had the head off I sent it in for a valve job to restore the seats.... I ended up having to replace all the valves and guides due to wear at this time..... I then installed the restored head and upon inspection after the test ride I detected a very minor coolant leak in the right exhaust port....
To make a long story short: I ended up with a very small {almost undetectable} leak between the head and the valve seat.... My cure for this was to pick up a used head and fork out another hefty sum for more valve work and a new head gasket.... I don't mind paying for one valve job every couple of years but paying for a second one kind of hurts....