need help bad!!!!

just traded a 1989 kawasaki 250 mojave for a yamaha 1986 xj700. Guy said there were some minor problems. Got it tried to start it with choke on started fine but after warm up took choke of bike dies out tried sdjusting ide screw didn't work. Took carbs off opend each one and clead with carb cleaner didn't take jets out though. puit carbs back in doaes same thing but know when i take ckoke off engine reves up pretty high the dies. Help Please. 'm in the chicago land area near route 66 speedway

 

you need to remove the jets and other stuff, clean everything, check float and balance. I just did mine. I didn't take the rack apart, but I removed everything else, cleaned inspected, and adjusted. Watch the air passages too. A clogged air passage will make it run bad too.

 

check the petcock make sure its working properly you might not be getting enough gas quick enough to keep the float bowel full . try it on prime see what it does before ripping the carbs apart just a thought you can check it by pulling the hose off the manifold and off the petcock suck on the hose see if fuel comes out of the petcock

 

Out of curiosity BigHoss72 how well "tooled" and knowledgeable about rebuilding/bench tuning carbs are you?

I'm in Bourbonnais and another user is in Chicago Heights w/o the tools.

Though I did order the YCIS Eliminator tool and and trying to win a colortune on flea bay...

 

BigHoss:

There's dozens of Members, in here, that will testify that you'll be a whole lot better off after the Carburetors have been removed and very thoroughly cleaned.

Following their Cleaning you can proceed to remount the Carbs and enjoy the thrills and spills of Fine Tuning.

The BEST thing you can do is get yourself prepared to Clean the Carbs or have someone with mechanical experience help you.

Having a Workshop Manual specific to your Bike is an invaluable resource.
What you need to know about what you need to do is all prepared in a Step-by-step ... Play-by-play format, on pages in a Manual you can enjoy reading at the beach.

 

Guys, please, slow down back up. Check the rear brake for delamination before you do ANYTHING ELSE, like ride the bike. http://xjbikes.com/Forums/viewtopic/t=15874.html

Not only that, the brake fluid, brake hoses, TIRES (how old are they anyway?) all need attending to right away. You can't just start riding it, it's not an '86 Pontiac. It can hurt you.

If you latch onto a quarter-century old bike, and actually want to USE it (like I do, X2) you have to properly "recommission" it. Gotta either go big or suck wind. No in-betweens, I tried. Doesn't work. Go all out and do it RIGHT and you get a new bike for a fraction of the cost of new. Try to look for "easy outs" and you will fail.

It's up to you.

Read: http://xjbikes.com/Forums/viewtopic/t=24010.html
Read: http://xjbikes.com/Forums/viewtopic/t=14581.html

Then decide. Honestly, I'm not trying to discourage anyone, I love it when another new XJ owner takes up the cause. You just need to understand what this means, and decide if you want to ride this bike... or fiddle with it forever.

It really is your choice.

 

Fitz speaks of wonderful things. I chose to take it up and am still in the process, but the experience has been incredible and more rewarding than anything else I do.

I have taken the plunge, but I also do about 10 hours of reading for every one hour of work. I like to know what I'm getting into... but at this point I feel like there's nothing I can't do. Except get that damned dent out of my tank.

 

the bike has been rode before the guy bought it from his neighbor. The namber let a friend mess with carbs so the guy i bought it from bought used carbs from ebay.
i did notice one of the floats didn't spring back up like the others when i took it apart.

 

if there is someone close to joliet IL to show me how to clean carbs properly i would appreciate it

 

If your getting it to fire up with the choke on when its cold your doing better than most people on here who pick up their bikes.

Theres alot of good information on this site regarding rebuilding carbs and cleaning. Its not as hard as its made out to be it is just time consuming.

Don't take the carbs apart from each other unless you absolutely have to. Just disassemble each carb. Floats, jets slides etc. Be careful with the diapragms or you'll be looking for another rack of carbs. They are pricey.

The way i cleaned mine was concocted a homemade ultrasonic cleaner. Took an aluminum pan and duct taped a palm sander to the bottom and put water and mr clean in the pan with the carbs. after an hour the crap that came out of the carbs even though visibly they looked clean was amazing and that was after cleaning them with spray carb cleaner.

The best advice is read, read, and read before and during the process. :lol:

 

Well i cleaned the carbs still haveing idle issues. any advice what to do next. i think it maybe a vaccume problem!!!!

 

Really need more info to diagnose. You can check for vacuum leaks using an UNLIT propane torch. The idle will change when it sucks in the gas. Use water on the headers to see which CYL is the lazy one at idle. Post a pic of your plugs (1,2,3,4). Describe your problems in detail.

Welcome to the site !!