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oil drain plug

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hi guys i did a search and didnt find the answer to 1 question.

I have a 05 yz 250 and my sump has being stripped of it's threads,so i am gonna insert a helicoil but there is a small hole on the left side of the threads in the sump so if i put in a helicoil will it matter if i block this hole :bonk:

What is this hole for?

I dont think there should be a probelm because when the bike is running the oil will be up in the gearbox and clutch.

Any advice would be greatly appreciated



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You will be fine... seen it done many times. Someone over tightens the drain plug, strips the threads, and ends up needing a heli coil inserted. Works just fine!

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