Carburator top hoses go to...?

[Macamon]

I thought I seen this somewhere in the forum but cannot seem to find it now. Could someone point me in the right direction or outright tell me.. The bottom T on the carb feeds the fuel bowls, what does the top t feed or vent??

Thanks

[3Phase]

Mac, the carburetor vent hoses connect to the two small fittings on the air box; should be one on either side of the breather vent hose.

[Macamon]

Thank You

[3Phase]

You're welcome!

[XSessiveForce79]

vacuum lines questions

I just switched out my old stock coils for some other stock coils..replaced my fuse box with a Napa blade style box and took out my stock air cleaner box and installed POD type air cleaners for each carb.I installed a POD type filter for the crankcase breather...now what to do with those 2 small vacuum lines at the carbs..?? 79XS1100 standard...bike seems to idle nice,runs smooth..and has a cool growl.but seems a lil less snappy...what are those vacuums lines suppose to be doing?

[bikerphil]

Less snappy throttle with the pods is because you don't have the velocity stacks anymore that the factory air box had, JMHO. As for the vent lines, either leave them open or put a small fuel filter on each one to keep dirt, bugs etc from entering. They must be open to atmosphere to prevent flooding of the carbs.

[natemoen]

Less snappy throttle with the pods is because you don\'t have the velocity stacks anymore that the factory air box had, JMHO. As for the vent lines, either leave them open or put a small fuel filter on each one to keep dirt, bugs etc from entering. They must be open to atmosphere to prevent flooding of the carbs.

My question about those little hoses is that in the factory setup there would be a little bit of vacuum being applied to those lines, and then that would create a different atmospheric pressure inside the float bowls.

Could that then cause changes with the fuel level/ how fuel flows up the jet and into the air stream going through the carbs?

[DGXSER]

Could, Should, and Would...

As a matter of pure physics, yes, there is the COULD part of the equation.

How much vacuum is created, and how much friction is invovled in pulling any amount of air through the path of those lines, to those T's and through the carbs? The difference is the amount of vacuum the float bowls SHOULD see.

Now, based upon info from many others here who run POD filters and their journey to tuning their carbs I have watch documented on the site, and in person on one or two occasions, I would say there WOULD be no noticable change. I have seen several play around with float levels and typically always come back to factory works best, PODs or not. I know one or two people will say they get much better results with non factory float levels, but the majority work best at factory.

So like Phil stated, most just tie them up to the frame under the tank, some put a filter on them.

As to your throttle snappyness, well, most POD owners will tell you they lose a little on the bottom end, but gain it back and then some on the top end. Also, almost all have to rejet for the POD filters to get the best results.