Quote:
Originally Posted by akh1685
......... And yes, it came with an aluminum washer.........
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You will need to plan time to disable the bike, just in case any repair takes some time.
You will need to drain all the oil and inspect the condition of the aluminum threads in the crankcase (the old plug is not likely to be damaged).
See how the new plug adjusts in the threads; it doesn't have to be perfect.
They may be strong enough to put pressure on the new washer and eliminate the leak.
If not, you will need to find a way to seal that hole and use the new-gen system.
You could try a helicoil but the problem is that the threads need to be perfectly perpendicular to the flat sealing surface in order to avoid any leak.