What size bolts for the carb bowls?

[GrandPrix46]

Anybody know what size/thread bolts go in the bowls? Bike didn't come with any, and of course when I re-did the fuel lines and put some gas in, it started pouring out from the bottom. I assume they will also need copper washers, where's a good place to get those?

[81xsproject]

I know that they are M5's

[xschop]

metric

IIRC they are M8 x 1.0

[randy]

Fellas, I believe he means the drain plugs, not the bowl screws.

[GrandPrix46]

Fellas, I believe he means the drain plugs, not the bowl screws.

Sorry for not being more specific, but yes, it's the drain plugs that are missing. Also known as the bleeder screws.

[randy]

FYI;

Those screws are special, they have a tapered tip. Any old screw won't do the job. IIRC, been a while, but I had the same drain cocks on my '81 Special. They also have an o-ring on them?

[GrandPrix46]

So it's a dealer-only part, then? That sucks, guess i'll start calling around and see if anybody has them.

[jetmechmarty]

carb parts

You can probably source them from www.motorcyclecarbs.com as an alternative.

[randy]

Or Andreas!

[red bandit]

Those screws are special, they have a tapered tip. Any old screw won't do the job. IIRC, been a while, but I had the same drain cocks on my '81 Special. They also have an o-ring on them?

81 are they only one's that have that style (horizontal). The 78,79,80 have a brass hex bolt that goes up into the bowl in a vertical position. GrandPrix, which do you have? Horizontal or vertical?

[GrandPrix46]

GrandPrix, which do you have? Horizontal or vertical?

They're vertical (go up into the bottom of the carb). I'll check that motorcyclecarbs.com out.

[Ken Talbot]

If you're looking for this:



it is a M8x1.25 approx 6mm long, 10mm head size, brass if you can find it.

[GrandPrix46]

That's the one. Thanks bro, i'll hit up home depot or autozone tomorrow and see what I can find.

[randy]

I thought there was a carb change in '80, the bowls didn't change till '81?

[red bandit]

I thought there was a carb change in '80, the bowls didn't change till '81?

They did change the carbs in 80. 80 & 81 bowls will swap but the 80 take the same drain plug as 78-79, 81 has diff. drain "screw" with down spout for tube hook up.