Maintenance & Technical > KX100 / KX85 / KX80 / KX65 / KX60

KX60 blowing big ends! What do I do with this engine!?

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easykiwi_rider:
So I cleaned the left side of the crankcase up under the magneto with a wire brush.

Pics showing moulding mark failures as predicted by the Guru Gorr.
 
I pasted epoxy resin over them.

easykiwi_rider:
Hi all,


I thought I'd give you all an update (I hate it when people don't update!) so we can share the lesson.

So, I took the good advice offered and decided to rebuild (again) but this time without the washer.  And also without the carb spaced (for good measure).  And also the case cracks plugged.

It went together a dream and started easy.  Bore a little scratched from the imploding crank; but still starts OK.  Might resleeve is as Smacoroni suggests when it needs a new piston.

The end result?

Running 32:1, we've got 8 h on it and counting.  The young fella's learning about throttle control (she flies when it hits top end!) but having a whale of a time.

So I'd have to say exhaust restriction #1 problem.  Cracked case #2.  Put them together and buy shares in cranks...

Foxx4Beaver:
Excellent!!...roost on!! :-D

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