Topic: O-ring size - 78 cb550 drain bowl screw

[boaf]

I need to replace the o-rings on my drain bowl screws on a 78 cb550.

I have searched and can’t find any info on the o-rings.

The carb rebuild kits have the o-rings but they aren’t available OEM separately nor can I find their size.

Can anyone help with the size so I can go to my local shop and buy.

I believe they are 4.0 x 1.8 mm based on measuring an existing one but not 100% sure due to its condition.

Steve

[bryanj]

Cant help you there. Sometimes if you look the part up on cmsnl the part number will have the size but not always