hi scott,
what is the milage of your tenere?
it's difficult to say something without hearing the noise.
is it always present or only when the engine is cold?
in the worst case, crankshaft or rod bearings are gone. but to check this, you have to dismount the cylinder at least.
other possibility is a loosened primary drive. this you can check by dismounting the right engine cover.
did you check the camshaft chain tensioner?
valve clearance?
oil consumption?
good luck!
klaus@xt600.de
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