White Brothers fuel mixture screw

bro

Member
Mar 21, 2002
60
0
I just bought a White Brothers fuel mixture screw for my CRF250 and am not sure how to install it.

The new screw has an o-ring between the threads and the adjusting knob. The original screw has the o-ring at the very tip.

Do I need to use my original o-ring? I hope not because it is toast.

The new o-ring doesn't seem to fit into the hole in the carb. Does it just sit against the carb to create a seal or are you supposed to mash it into the hole?

Thanks
 
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