1979 xs1100s ignition issue

[GLoweVA]

Obviously the thief had to know that the carbs are worth something otherwise why take them?!

[dondons1984]

Ive called all my friends and explained to them that I have called the police. They understand how serious this is and none of them have stolen anything or played a prank. This just really effing sucks. I cant believe someone would do this!!!!!

[oldyam80sg]

Well the first question i ask is-Any of your friends playing a joke on you?Was anything else taken from the bike? If not,i would look on E-bay or Craigslist as someone might try to sell them.

[dondons1984]

so I got up this morning and went out to start my bike and yeah, someone stole my ****ing carbs!!!!!

I called the police made a report and all they do is ask me if I have any information on them. I tell them know and they just say that they will do what they can but I wouldnt count on finding them!

Anyone got any carbs that work that I can do payments on now?

God damn mother Effer son of jose kick me and just let me die!!!!

[BA80]

3 things Don,

#1) Be sure your throttle linkage at the carb isn't hanging up, possibly on a boot clamp.

#2) be sure your throttle cable is properly routed and isn't binding.

#3) SYNC THOSE DAMN CARBS!!!!!!

[dondons1984]

OK so started it up was running fine then hit high rpm so I shut it down and now I go to start and it backfires but won't fully start . What's up?

[BA80]

Sometimes they will leak for a bit if the parts are old but after a bit of use it will stop. Be sure you have the good side out against the lever.

[dondons1984]

thanks. I didnt have to go in till 2am (working the farm for 12 hours) so I soaked them in to see if they would right off the bat kind of work and I was leaking gas (yes I read your note I am just impatient). so now I will let them soak in gas overnight and hope that they work. they looked in pretty good condition to me.

THANKS A TON GREG!!!!!

[BA80]

Overnight should be good. They haven't been in contact with it for a while and are kinda dried out and hardened.

Hope they work for you man.

[dondons1984]

greg got the parts you sent me. How long should I let them sit in gas? If I dont will I leak?

[dondons1984]

damn that made my nuts hurt!!!!

[BA80]

Here's 2 NOS floats.

http://www.ebay.com/itm/YAMAHA-XS400...7d2005&vxp=mtr

[dondons1984]

just waiting on parts now.

[3Phase]

Don,

CB750 floats? I like it! I'd buy another float or fix the leak but it's your bike!

Where is the leak?
Is it in the solder seam holding the two halves of the float together? (most likely)
At the float/float arm solder junction? (someone bent/twisted/abused the float)
Somewhere else? (not as likely but it happens)

The explanation of how to repair the float looks more difficult than it really is but the leaks can be fixed if you have a soldering iron and some time. If you don't have the time just buy another float that doesn't leak and don't worry about it or try to fit your CB750 floats. If you don't have a soldering iron you could buy one (or two, or three) for what a new float would cost.

Moving right along! To fix the float, put it in hot water and mark the leak(s) with a metal scribe.

De-solder and open the vent hole in the side of the float so the float can be heated but won't collapse when it cools off. The vent hole is underneath the single patch of solder in the center of the outside of each float.

Drain any water or fuel out of the float and make sure it's dry inside before you start or the fuel/water will boil out of the float and contaminate the solder as you try to make the repair.

Clean! the outside of the float to get rid of any fuel residue, finger oils, and oxidation.

Fix the leak.

Quickly solder the vent hole closed. If the float gets to hot while you close the vent hole it'll collapse as it cools.

Check for leaks again by putting the float in hot water.

Put the carbs back together and go ride!



Be careful:

Don't overheat the float when you're trying to fix it or it'll come apart and you'll have a lot of fun trying to put it back together again.

Don't add too much solder or it'll change the weight of the float. The float will still work but you won't be able to use the normal factory float height setting and the float height will have to be set by checking the the dynamic fuel level in the float bowl with the engine running.

[dondons1984]

Ok so I just bench synched the carbs so that was fun. I looked up how to bench test them and did it that way. no leaks at all. so all good so far. just dont freaking jinx me!!!!!! Only carb i cant test is the one I need a float for. wondering if I can take the one off my cb750? hmmm now that is an idea. anyone got any input on that part?