KTM leak down test

Matt Fisher
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Matt Fisher
Edited Date/Time 4/18/2024 9:10pm
So I’m trying to do a leak down test on my 2017 350, and all of the adapters I’ve tried seem to not seal up properly, I think the hole is so small that the edge of the adapter bottoms out without the O-ring being able to seal up against the spark plug hole.
For anyone that’s been able to do a leak down test on this type of motor, are you using a special type of adapter, or am I just not doing it right?
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motoracer58
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motoracer58 4/19/2024 6:48am
4/19/2024 6:48am

I've never had an issue using the standard parts in my motion pro kit

Matt Fisher
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Matt Fisher 5/12/2024 6:38pm
5/12/2024 6:38pm
motoracer58 wrote:

I've never had an issue using the standard parts in my motion pro kit

Thank you! That was exactly what I needed- the Motion Pro adapter worked perfectly.

75 PSI in, and held 74.5 PSI.  Fantastic for 154.7 hours, particularly given that it has an aftermarket cam, porting, tuned ECU, etc.  Original piston, rings, crank, etc.

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