non runnin 84 250r

[timberwolf78]

well im really starting to get really mad at this thing. it has a new top end 110 octane fuel mixed 32:1 new fuel line and filter , the carb has a 130 jet which is what the book calls for and being that the top end is basiclly identical to the way it was when i bought it .040 wiseco i jus got a different cylinder from the honda shop here and a new piston is all. it will start fine when its cold i mean bump the throttle 2 times pull the choke and it fires on the first kick but it only runs for bout a min and its almost like you turn the fuel off and it dies , also it wont wind out jus gets up right before its wound out and starts stuttering real bad and then it starts cutting out after it dies i can hold the throttle wide open for about 5 secs and then it will fire back up and do it again,
please help or im gonna drop a match in the tank and push it off a cliff

[ATCnut]

Sounds like a fuel flow problem. Pull the line off of the carb, hold it over a gas can, turn on the pet****, and see how fast the fuel is coming out. It should be a steady stream. My guess is that it is just a dribbling out. It sounds like it runs until the float bowl is empty. The bowl fills back up while it is not running. Take the bowl off of the pet**** on the tank and see if the screen is plugged up. there is also a screen in the tank, be careful it is plastic and easy to screw up. You get to the tank screen by taking the whole pet**** off. You should be able to see the tank screen by draining the tank and looking in the filler cap. Another thing to try is to put the pet**** on reserve.

[atc330r]

man, you still didnt get it going. you dd all the pet**** cleaning last time right? your bored 40 over you will have togowith a bigger main jet like a 150. like he said put it on resevre. it seems like that will
by pass the in tank filter. i havn,t had a 250r tank apart all summer. just lucky i guess

[timberwolf78]

it ran b4 i bought it only prob with it was it had a piston meltdown but the topend is the same as it was b4 it was .040 b4 but the piston had a hole in it and i jus happened to find a new piston and a reworked cylinder at the dealer in stock too but essentially its the same as it was.

[timberwolf78]

i pulled the fuelline off the carb and stuck in in a gas can and turn the pet**** on and the fuel comes out steadily not a dribble but actuallly pretty fast so now what

[ATCnut]

Im not a 2-stroke guy. I have heard about problems with the crank seals messing up the fuel distribution. Anyone have a opinion on that problem?

[83Atc250R]

that does happen it was causing some problems on a 185 i just had and i sold it because of that problem.

[Dirtsquirt]

Crank seals can let a little bit of mixture out or let air pass into the motor which leans out your mixture.

Is your plug properly gapped and/or do you have the proper plug?

B8ES or B9ES

[atc330r]

just for the hall of it try running the motor with the gas cap off. if it still dies. your going to have to
do a pressure test to see if the seals are bad. it,s just sounding to much like a fuel flow thing.

[83Atc250R]

i had a similar problem just like 5 minutes ago on my 110 threw another carb on it and it was FINE!

[Mr. Richard]

sounds like you got the same problem as the prior motor!!!! when you melt a hole in the piston it is usually real lean and you are getting detination ,,,,,,,,,,,,, pull the drain out of the carb turn the fuel on make sure you have alot of fuel flow!! ALOT NOT A DRIBBLE!!!,,,,,,,,,,,,,,,

[Black Sheep]

i agree with kasey this sounds like what caused the failure in the first place. have you completely cleaned the carb? passage ways and all? what is your float level set at? how about your air screw how many turns out is it at? you do not need to rejet just because you bored it to .40 over.
you could also have a air leak. seals,intake gasket,head and base gasket,
if you have a compression testor see if it will hold compression for say a hour. if it goes down you have a air leak.
this is just a few areas to look at

[atc330r]

a compression tester will only show whether or not your head gasket is leaking. if you hold compression for an hour. you,ll be in the guiness book of records. you,ve had this problem for over a month??? right??. have you done all the cleaning people have talked about?? if you,ve done that pressure test. then it only leaves the cdi, coil, plug wire or some other wiring falure. next time it dies reach under the tank and feel the cdi box and coil to see if they feel warm. clean the ground wire contacts on the coil. trim off a 1/2" off the plug wire both end to be sure theres good contact there. your sure your not running it with the choke on??? that will do just what your talking about untill the plug fouls so bad that it wont start. try thuis as soon as it dies turn the fuel tank off. use a 17mm box end take the plug out of the bottom of the carb. there should be a float bowls worth of fuel run out. which will seem like alot. if its only afew spoon fulls then its a fuel flow problem.

[timberwolf78]

ive done everything except for the pressure test , ive also heard bout seals leakin will cause this but im not so sure its the seals plus the fuel is coming out of the line fast enough for it to run but to me the condition is getting worse than it was when i first started messing with it,i changed the fuelline jus to be sure and i think the problem got worse since then. ive got the stuff to do the pressure test jus havent felt like tearing the stuff back down as for the plug its a ngk b8es but my clymer calls for br8es but the only diff is one is a resistor plug and one is not im not sure but i dont think that would make a diff.

[timberwolf78]

and also after it died the last time i pulled the plug as soon as it quit and grounded it on the side of the head ands ran the kickstarter by hand and it still had a pretty good blue spark so im not leaning towards electrical probs yet.

[timberwolf78]

well i pulled the cdi and the ignition coil and checked them with a meter according to the clymer manual and guess what unless my meter is junk , their fried so anybody got a good cdi and an ignition coil for a 84 250 r send em my way

[jenndnn3]

Timberwolf I have been following your thread for some time to learn from the pro's....and I really feel for ya. Wish I had magic wand to make it all better. But now I have a question for all the pro's.cdi and ignition coil would cause a piston melt???? If so how is this done. For give the stupid question just learnin.

[timberwolf78]

jenn i dont think that the cdi coaused the meltdown b4 i think it was running lean to but im still not real sure if i put a new cdi and ignition coil on it if it would fix it or not but im pretty sure that the cdi is fried but not to sure bout the coil but i know the stator is good