Carb bowl drain bolt size/thread - CV carbs - and where to get?

[mmattockx]

My question of where to get them is asking about the bolts, not the gas.

**** Has someone found a source for these bolts other than Suzuki?

Did you try Sudco for Mikuni parts? Why is a Suzuki dealer not a reasonable place to order them from? Are they a discontinued part?


Mark

[Nessism]

Why not just modify the screws you have now if the goal is to create a "fast drain" feature? The factory screws are special in that they have an integrated washer shape underhead and it's unlikely to find an off the shelf screw that's a perfect match. If you are just looking to make some level gauges, just about any screw with the right thread shape will work. Drill out the center of the screw and JB Weld on some steel tubing. Put an O-ring on the screw and run them in hand tight and they won't leak. I've made just such gauges before and they work perfectly.

BTW, the sealing washers for those screws are unique. They are not O-rings. Robert Barr includes O-rings which are okay, but the proper sealing washers are superior for that application.

[Fjbj40]

I just picked up 4 of the drain bolts from a used parts place. Drilled #30 holes as it was a snug fit for #2(1/8") copper tubing and made my fuel height tooling. Worked great, helped me fix my carb issues. Even though my floats were set to spec, the fuel height was not where it was supposed to be, it was to low. This caused a lean idle mixture that could not be tuned out with the pilot screws.

As has been stated, you will have a hard time finding the screws just anywhere. I paid $10 for the 4.

The bolts are around $6 each from Suzuki.