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Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc.

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Old 01-17-2011, 02:13 PM
vgstef vgstef is offline
Join Date: Nov 2008
Posts: 22
Default Small hole in bottom of engine ???

I was changing the transmission oil on my ec 300 2006 and i notice a small hole with out any srew on the botton of the engine . This is not the allen bolts for the crankcase . I am talking about the one in the picture with the arrow ? I am suppose to have a srew in this hole ?

Thank you for the help

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Old 01-17-2011, 03:17 PM
jostby jostby is offline
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Join Date: Oct 2006
Location: Spokane, WA
Posts: 748

Some say it is used as a hole to mount a jig when the cases are built. May be true, I don't know. It also is drilled upwards at an angle into the ignition/flywheel housing and acts as a drain for errant moisture. They aren't meant to be plugged.

'00 XC250 (mine)
LTS front and rear suspension, power valve cover, carb jet kit and rear chain glide, RB Designs head mod, BRP tall triple clamp, backyard foot-peg lowering conversion.
'04 EC250 (the kids)
(he can do his own mods haha!)
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