New Startup Running Problems. PLEASE HELP!!

[BigRed]

Another factor in this will be your float height. If the fuel in the bowls is too high, you can get a RPM drop or a stall when you come to a hard stop. First step is to get the butterflies synched. Next, set your floats; this will affect all RPM ranges. Your main size will affect your mixture in the upper RPM range, and your idle screw setting will affect your idle mixture. You should check your sync after adjusting your idle mixture screws too... it may or may not have changed.

Good luck!

[JoshKeast]

How do you set float height?? I don't remember seeing any kind of adjustment when I rebuilt the carbs.

[BA80]

You REALLY need to get a manual Josh.

[BigRed]

How do you set float height?? I don't remember seeing any kind of adjustment when I rebuilt the carbs.

The short answer is that you bend the little metal tab that the float needle hangs on. The long answer is in the tech tips section... found here: http://www.xs11.com/xs11-info/tech-t...balancing.html

Good luck!

[JoshKeast]

I have a clymer manual, it says bend the tab, clearence should be 1.012 plus or minus .04. Not the best description for someone who's never done it before. That is why I come here, BA80, to get answers from more knowlegable people willing to share their knowlege.

Thanks for the link to the tech tip BigRed.

[JoshKeast]

Just thinkin out loud here, since I swapped to Pod filters, I lost the rear support of the rubber boots. If my carbs are hanging down just by a hair, and are out of level, can that affect the performance of my floats?

Should I sit on the bike, level the carbs, and then make a bracket to hold them that way?

[crazy steve]

I have a clymer manual, it says bend the tab, clearence should be 1.012 plus or minus .04..

If your bike is a '81, that's the wrong spec. That number is for the '78-79 brass floats, and your carbs should have plastic floats if you have the original carbs. The plastics floats should be set to .906", +/- .020".

The Clymer manual 'main' text covers the '78-79 bikes; it has a section in the back covering the changes to the later bikes, you need to check there too...

[JoshKeast]

thanks steve, I would not have known that. I'll check there too. Any thoughts about a bracket to support the rear of the carbs?

[motoman]

thanks steve, I would not have known that. I'll check there too. Any thoughts about a bracket to support the rear of the carbs?

If you have it, put the stock airbox back in there. It doesn't have to be removed to remove the carbs anyways, and it will be easier to tune to run right at all rpm ranges.

[bikerphil]

Just thinkin out loud here, since I swapped to Pod filters, I lost the rear support of the rubber boots. If my carbs are hanging down just by a hair, and are out of level, can that affect the performance of my floats?

Should I sit on the bike, level the carbs, and then make a bracket to hold them that way?

I wouldn't worry about if affecting your float level, lot of people don't even run any rear carb support bracket with pod filters. It would be a good idea though after you are finished sorting them out to add one to relieve stress on the front carb boots.

[James England]

I did synch the carbs the best a could with the vinyl tubing/brake fluid setup. I know they are close.

I know that we're not made of money these days but... if at all possible... I would buy a set of the four vacuum gauges that are on eBay. I bought some for about $50 and I do think they are a good investment and the only proper way to synch the carbs. I was surprised at just how good they are actually.

[DGXSER]

THe only issue with a 4 gage setup, is the calibration of the gages. Not saying all will be off, but most will be off from one another at least a little.

For me, being a true cheapazz, I made the PVC plenum setup form the tech tip, and use my Mity Vac vacuum gage hooked to one end of the plenum. The other end I move from one carb to the next taking readings and adjusting. Takes maybe 30 minutes to synch the carbs that way.

As to accuracy, it sounds pretty nice when done and I can tell the difference. If you do not calibrate a 4 gage setup to a knonw vacuum source, then I am certain my method would be more accurate.

If your not afraid of spending some do-ra-me, then the Carbtune 4 stick setup is a really nice option.

[graybird78]

josh i live i c.b. i have 80sg.can get together.you can see how my bike runs.

[JoshKeast]

Another update!

got the bike running!!!! was out on the interstate after over 100 miles of successful, fun riding and BOOM. TRANSMISSION BLEW UP!!!! YAY now i get to work on the bike MORE!!!!!!

[natemoen]

Middle drive, final drive, or transmission gears?