98 Yahmaha XT 250 Won't start

[nwoods29379]

98 Yahmaha XT 225 Won't start

First off, this is the first bike I have ever worked on so I will tell all that has been done. It has been sitting for a couple of years now and it still had gas in the tank. So first thing I did was drain out all the old gas and cleaned the air filter. I then checked the plug and oil which seemed fine, niether was dirty. I opened up the the carb and cleaned it out the best I know how. I put everything back together the way it was and tried to start it but it only turned over. I checked the plug and there is spark. I removed the air filter and sprayed some starting fluid in it and it started but died as soon as the starting fluid was gone. From what I can tell with my lack of ecperience, it seems no fuel is getting to the cylinder. How would I fix this?

 

[1BAD250]

first off you should pull the plug & put a cap full of oil in the cyclinder & rotate the engine a dozen times then diasemble the carb. remove all jets & be sure every oraface is clean a free of any resadoe. use carb. cleaner & shop air also be sure you getting good fuel flow from your tank. also if its been sitting that long take a look & make sure ther are no mise or small bird nests in the muffler or air box it happens..good luck..

 

[rmc_olderthandirt]

I opened up the the carb and cleaned it out the best I know how.

That's not enough information to help......

If the carburetor had gas sitting in it, or worse had the gas valve open so that there was a tank worth of gas being fed to the carburetor and it sat for a few years then it is highly likely that the gas condensed down to a sticky goo that is really messing things up.

It is easy to clean the float bowl out, but that isn't where the problem is. What needs to be cleaned are all the tiny passages, especially to the main jet, idle circuit and metering jet.

You need to completely disassemble the carburetor, including removal of the jets and especially the float needle valve and its seat (if you don't remove it you will destory it). Then soak the carburetor pieces in a good solvent overnight. Now use compressed air to blow out all the liltte passages. Rinse in warm water, dry it off real good (compressed air again) reassemble with new gaskets and preferably a new needle valve and seat.

 

[nwoods29379]

That's not enough information to help......

If the carburetor had gas sitting in it, or worse had the gas valve open so that there was a tank worth of gas being fed to the carburetor and it sat for a few years then it is highly likely that the gas condensed down to a sticky goo that is really messing things up.

It is easy to clean the float bowl out, but that isn't where the problem is. What needs to be cleaned are all the tiny passages, especially to the main jet, idle circuit and metering jet.

You need to completely disassemble the carburetor, including removal of the jets and especially the float needle valve and its seat (if you don't remove it you will destory it). Then soak the carburetor pieces in a good solvent overnight. Now use compressed air to blow out all the liltte passages. Rinse in warm water, dry it off real good (compressed air again) reassemble with new gaskets and preferably a new needle valve and seat.

There was gas in the tank and the valve was open. From what all I have now read, due to my inexperience with carbs, all I did was clean the bowl.

 

[1BAD250]

you will need to completely tear the hole carb. down & soak it over night next day clean every jet & hole in the carb. you should take a look at your reeds to if there the stock type they could be stuck closed you realy need to go threw the hole bike every nut & bolt pivit point just to be safe a lot of parts are going to be dried out. just take your time do one job at a time so you remember how to put it back together. just restore,repair or replace part by part you will learn at the same time & save money in the long run.

 

[nwoods29379]

Well, I tore the whole carb apart and soaked everything over night. Then I blew everything out with the compresser. I put it all back together and it runs like a dream EXCEPT when you try to just let it idle. If I open the choke a little it will idle fine but if I close the choke it dies. Would this be cause by the air screw??

 

[1BAD250]

did you try to set the idle? if you cant find a idle screw than you set it at the choke.

 

[1BAD250]

i found a exploded veiw of you carb. but cant post it if you give me your email il send it to ya. it showes your idle set screw being on the bottom left hand side of the carb. i also found a carb. starter set on the bay.

 

[nwoods29379]

i found a exploded veiw of you carb. but cant post it if you give me your email il send it to ya. it showes your idle set screw being on the bottom left hand side of the carb. i also found a carb. starter set on the bay.

I have an exploded view from the yamaha website and have tried adjusting the idle. I was looking over the carb yesterday and noticed the the part labled "pilot screw set" on the exploded diagram is actually GONE!! Thank god it's my brother-in-laws dads bike not mine. He is supposed to be getting a rebuild kit and I'm going to make sure the pilot screw set is replaced.

 

[1BAD250]

good deal hope it works out for ya.