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Sorry for the dumb question but I'm just learning my way around the engine.

In preparing for winter, I already added STA-BUL, topped off the tank with gas and mixed it well. Then I ran the engine for about 10 minutes and moved the gas valve switch to OFF to starve the carbs.

Do I really need to drain them? If so, please see the picture and let me know if these two screws are used to empty each carb. I do see what looks like a drain tab in the back, that I could connect a small hose too. I realize the other carb (not pictured) has a similar pair of screws.

Thanks,
-PH
 

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I don't even starve mine. I just add Sta-bil, take it for a short ride to make sure it gets to the carbs, then shut it off and turn the gas off (more out of habit than any other reason). Started right up last spring and ran great all summer. Nothing wrong with what you did or draining them. I really don't think it makes a difference one way or another but I bet you'll get as many opinions as you would asking what the best oil to use is (well maybe not QUITE that many...lol).
 

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If you turned the petcock off and let the bike run till it quit then the carbs are already drained.

I think its a wash - if the fuel stabilizer works as intended then its better to leave the carbs full of gas, so the alum parts wont oxidize (same reason you keep your tank full, so it wont rust).

If you somehow got a bottle of bad stabilizer then draining the carbs is better, but you will have a gas tank full of gunk anyway, that will fill your filter with gunk. If that happens draining the tank and replacing the fuel filter should be all you need to do.

You should never have to take the carb apart on any vehicle - ever. The carbs on these bikes are not intended to be taken apart and put together over and over. The first time you try it, and strip out the screw heads, that will become obvious.

Edit: I just looked at your photo: NO! do not turn or take out screws on your carbs unless you are sure you know which one is which. Some are very carefully adjusted, and if you turn them you "screw up" the carbs.

When I was a teenager I worked in a neighborhood TV shop. Sometimes people would take the back off their TV when it was not working right, and see all the capacitor and inductor tuning screws, and grab a screw driver and "tighten them all up" because they looked loose. That was a $100 repair to re-tune all the filter circuits in the entire television.
 

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To answer the question, Yes those are the drain screws. The one on the left drains the float bowl and the one on the right ,below the solinoid, drains the area around the main jet, which is closed by the solidoid when the ignition is shut off. After you drain it pull the choke[ enrichener] and crank the engine a few seconds to suck the tiny bit of remaining gas out of the pilot jets. They are smaller and the ones that usually get clogged. Hope this helps!!
 

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If you do choose to drain them (and skkypupbob already explained how), I heartily encourage you to use the proper, good-condition #2 philips screwdriver to avoid stripping. If they're already stripped or sticky, they are cross-slotted for a straight-blade screwdriver. That's a 2nd-best option, IMHO, and again, make sure you use one with a good fit - solid in the slot and goes all the way across the screw head.

Toward that, one of my go-to tools is a screwdriver with an interchangeable 'hex head' fitting for bit tips, and DeWalt #2 Philips Non-strip bit heads. They really do seem to do a much better job. Look for the ones with the yellow band around them.
 

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Sorry for the dumb question but I'm just learning my way around the engine.

In preparing for winter, I already added STA-BUL, topped off the tank with gas and mixed it well. Then I ran the engine for about 10 minutes and moved the gas valve switch to OFF to starve the carbs.

Do I really need to drain them? If so, please see the picture and let me know if these two screws are used to empty each carb. I do see what looks like a drain tab in the back, that I could connect a small hose too. I realize the other carb (not pictured) has a similar pair of screws.

Thanks,
-PH
depends on how long your winter is
 
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