Just changed my cam chain. Three hours running. Went to a local enduro today. 3km in to the first timed section, the bike quit. Damage, one broken cam chain, two bent exhaust valves and the tensioner bolt got bent and cracked the head where the bolt goes through. The cam chain broke but not on the master....any ideas why? Brand new iwis.
Dammit Kayeffess,
That's a stroke of very bad luck.
At this moment i don't have clou what could have gone wrong, sorry!
Cheers Rens
That's a stroke of very bad luck.
At this moment i don't have clou what could have gone wrong, sorry!
Cheers Rens
Bitch is that ktm Canada doesn't seem to have any of the stuff on their online parts. Another shipment from the UK I guess 
. I think I got off lucky as there could have been a lot more damage. The damage to the head around the tensioner bolt will be the biggest pain.
On the up side, the cylinder liner still looks brand new
. I think I got off lucky as there could have been a lot more damage. The damage to the head around the tensioner bolt will be the biggest pain.On the up side, the cylinder liner still looks brand new
It was the only old generation berg at the race. A shame to have to put it on the trailer. I did get off lucky though.
I bought an 02 recently of a guy who'd experienced the same failure. The decompressor stop blot had backed out and caught between the primary gear and the lower cam sprocket. Lucky it happened while he was kicking over the bike, so no valve damage. Loads of Loctite going on in the rebuild.
Joined Nov 2001
17K Posts | 774+
Ely, England
i was going to say it is either the auto decomp stopper or the tappet locknut. these are the usual 5 culprits.
always remove the decomp stopper M5 allen screw and nut (8mm). let the decomp stop against the cam sprocket bolts.
as for the damage KFS, suggest that you scribe a line horizontally through the middle of the bolt hole and then the same vertically. get it welded up. file the faces flush and then drill in line with the scribes, OK?
regards
Taffy
always remove the decomp stopper M5 allen screw and nut (8mm). let the decomp stop against the cam sprocket bolts.
as for the damage KFS, suggest that you scribe a line horizontally through the middle of the bolt hole and then the same vertically. get it welded up. file the faces flush and then drill in line with the scribes, OK?
regards
Taffy
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