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The issue is that the helicoil in the stand bolt hole....

February 11 2018 at 4:25 PM
Brent Lykins  (Login blykins)

Response to Oil restrictors for BBM heads

....partially covers the oiling passage. So without grinding a little bit of the insert away, you won't get anything in a straight shot down in that hole.

Typically, if I know that I'll be running a restrictor, I'll grind that part away, and then either tap the hole for a 5/16-18" set screw, or a 1/16" NPT pipe plug. Then you can drill either plug for the right size.

You need something with about a .070-.080" orifice in it.

I would imagine if you got creative on shaping something, you could slide it in the hole around the insert.

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