640 main bearing failure......
A sad story and a couple of questions...
Bought 640 2002 from Brackens, London, rode the bike to Australia last year (www.city2surf.c.uk
) with the usual fun and games and an unexpected small-end bushing failure - was it me or something else?
Ignored all of the advice on this board and imported the bike. Took the bike offroad for the first time a couple of weeks ago, when the main bearing went. Fortunately I was able to find a shack to sleep in and got the bike to a dealer (Wisemans motorcycles) within a couple of days. KTM Austria have just approved warranty replacement of 95% of the engine. Bike was in warranty by one day.
I have a couple of questions someone may be able to answer:
What can cause a main bearing failure?
Everything is being replaced other than the crankshaft and the top of the cyclinder head. I have asked the mechanic to look at the valve seats, which are original and have 50,000km on them. Should I be thinking about anything else?
Still love the bike!