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Discussion Starter · #1 ·
i just rebuilt the carb on my 1987 250 fourtrax and now it wont creep around real slow ....like when i need to run the fence line and what it is doing os running but going opo pop ......pop pop pop pop ........pop ..................pop pop pop pop pop i wasjed it out with carn clraner and did not really see anything gunked up..but after a 1/8 throttle is seems to run ok coud it ne in the wiring or still trash in the carb
 

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I would say there's still something in the idle circuit or either the float is sticking and it's flooding. Did you clean out the passageways in the carb body?

When it's popping, is any black smoke coming out the exhaust? If there is, I would say it's flooding. If not, I would say something's in the idle circuit. Also, did you adjust the pilot screw?
 

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Discussion Starter · #3 ·
yes i did clean it out when it pops no smoke at all and if you crack the choke shuttle open any at all it dies ... i am going to check the clean it again and this time use a strong light and see if i can see anything at all blocking it
 

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yes i did clean it out when it pops no smoke at all and if you crack the choke shuttle open any at all it dies ... i am going to check the clean it again and this time use a strong light and see if i can see anything at all blocking it
clean the jets out with just one wire from a wire brush..hold them up to a good light source..if they are clean..you should be able to see though them..make sure you poke the wire through the side of the jets too..if you spray your carb down with..say..gum out..< this is the best i've found on the market >..make sure you remove all rubber pieces..0-rings..everything..or you will melt the rubber !..take the carb after your have cleaned it really good..and with a air compresser..blow every little nook and cranny out with air..re-assemble the carb..after your done getting it back on the bike..make sure you don't have any cracks in your intake boot..this will cause your bike to run like crap..it's probally a good time to check the intake boot when you have the carb off..it's alot easier to remove the boot this way..and inspect it.good luck.
 

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Discussion Starter · #6 ·
yes i did clean it out when it pops no smoke at all and if you crack the choke shuttle open any at all it dies ... i am going to check the clean it again and this time use a strong light and see if i can see anything at all blocking it
clean the jets out with just one wire from a wire brush..hold them up to a good light source..if they are clean..you should be able to see though them..make sure you poke the wire through the side of the jets too..if you spray your carb down with..say..gum out..< this is the best i've found on the market >..make sure you remove all rubber pieces..0-rings..everything..or you will melt the rubber !..take the carb after your have cleaned it really good..and with a air compresser..blow every little nook and cranny out with air..re-assemble the carb..after your done getting it back on the bike..make sure you don't have any cracks in your intake boot..this will cause your bike to run like crap..it's probally a good time to check the intake boot when you have the carb off..it's alot easier to remove the boot this way..and inspect it.good luck.
will see i have done that b4 i will have to get it in a better light... does anybody have a break down of this carn ie which jets are for which circuits?? i know they should all be clean but i would like to know what goes to what and al i need to check the coil it maybe be weak cause it is oem coil will keep posted :funnyhonda:
 

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I don't have a diagram for the Fourtrax 250 carb, but I have a diagram for a Fourtrax 300 carb. I can't remember if they use the same carb, but I'm thinking they do. I'll post the diagram and you should be able to look at it and tell if it's the same carb as the 250.

 

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Discussion Starter · #8 ·
thanks for the diagram still have touchy issues with it i get it i am going to take a break b4 i get ill with it and sell it
 

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thanks for the diagram still have touchy issues with it i get it i am going to take a break b4 i get ill with it and sell it
Yeah, I know what you mean. When you get aggravated, just take a break and work on it later. That's what I do.
 

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just fyi, if you are tired of messing with that one, i have a good carb off my old 86 trx250 if you are interesting. has both cables still attached and the throttle cable is practically brand new
 

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I am assuming you have a Mikuni carburetor. You could be really leaning the bike out and it isn't getting enough fuel in the low end. But, I could also be wrong. Check your plug after running it full speed to fourth gear and killing the engine while it is still in the pipe and so forth.
 

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Discussion Starter · #12 ·
just fyi, if you are tired of messing with that one, i have a good carb off my old 86 trx250 if you are interesting. has both cables still attached and the throttle cable is practically brand new


ok let me recoop from what i have spent on it and talk to the boss ( wife) and i will let you know :icon_arrow:
 

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You didnt accidently move the retainer clip on the Jet needle during the rebuild did you? Also check to see that its properly seated in the slide
 
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