Missing rubber plug on bottom of carb...is it crucial???

[COP TZR]

After sorting out how to adjust my idle, I discovered that I'm missing one of the rubber plugs on the bottom of my carb.  Is it crucial to be there?  Will riding without it affect anything?

Here's a pic for reference.  You'll see that this pic has 4 of the black rubber plugs in tact.  I'm missing one on the far left side of this photo.
Can anyone chime in please.

[Howie]

Nope.

[koko64]

No problem. Your float bowls have a double skin for an oil jacket.

Those plugs just cover the holes that allow for the factory carb heating kit under warranty. Oil lines with banjo bolts run to an oil jacket in your float bowls. It was there for fittment of the warranty solution for carb icing. Warm oil is supposed to heat the bowls. Didn't work for my first Monster. The lines ran from one hole to the other, then to the other carb, really ugly. It had a tap you turned on in cold weather to divert some oil to the bowls.

See the thread that covers the later electric float bowl warmers ("Does anyone know what this is?"). It seems that the factory finally developed a good solution like that used on some cars. Edit: I've since heard that this didn't work either.

[COP TZR]

thanks guys.  Appreciate the help!