Chain Tensioner Cylinder Rear; Timing Chain Cylinder Rear - KTM 990 Adventure Repair Manual

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Chain tensioner cylinder rear

– Remove the bolt from the chain tensioner
NOTE: measure the preload on the chain tensioner element before
dismounting:
– Apply the chain tensioner bolt to the chain tensioner element
without compressing the spring.
– Measure the distance between the sealing washer and the cylinder
head.
The measured value should be between 6 mm and 11 mm. If the value
is lower, the tensioning rail could be worn or the timing chain
excessively elongated. If it is higher, the engine was turned to TDC
against the running direction.
– Remove the sealing washer.
– Pull out the chain tensioner element
NOTE: the housing and the tensioning piston on the chain tensioner
element are compression molded. If they fall apart during disassembly,
the chain tensioner element must be replaced.

Timing chain cylinder rear

NOTE: Valid up to and including model year 2006
– Loosen the bearing bolt
the cylinder head together with the needle bearing. The double
timing gear will slide down slightly, relieving the timing chain.
NOTE: Valid as of model year 2007
– Remove the screw of the bearing bolt
bearing bolt 4 with a screwdriver. The timing gear slips down easily
and the timing chain loosens.
4
– Remove the O-ring on the bearing bolt.
– Use a wire hook
to lift the side of the chain
teeth
double timing gear towards the outside by inserting your finger
through the hole for the bearing bolt.
on the double timing gear and pull out of
3
which you can bend from a piece of welding wire
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towards the inside from the chain
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over the gear teeth of the double timing gear. Hold the
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4-4
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and carefully press out the
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