Replacement needle jet o-ring

[Endee]

Hi all,
I need 2 replacement needle jet o-rings for my '79. I don't want to spend 10$ in shipping for 3$ in parts. Will an o-ring from the auto parts store work or is this something that will cause problems if it isn't the exact part.

Mikes has it listed as this
O-Ring - needle jet (nozzle main) Mikuni BS38 CV carbs
$1.93
IN STOCK
Only 108 left
Part
48-5020

 

[5twins]

No, you can use a "generic" replacement. The size needed is 1mm thick x 4mm I.D. I get them in Viton (a little better than Buna-N) rubber from McMaster-Carr in bags of 25. I refuse to pay several dollars for one o-ring.

https://www.mcmaster.com/#9263k284/=183hvyy