YZ250 no go

[JT.]

Bought an '02 yz250 a few days ago and been pretty happy with it. Went for a blat down the river yesterday for about an hour, no probs. Today went down, my bro started it, let it idle for about a minute. Told him to bring it around to the truck as we had unloaded it off with a dirt pile but instead he goes to have a quick ride and stalls it. Starts fine again and he rides along in first then it conks out. He crash starts it and it fired up but died pretty quick. Now it wont go.

Fuel was on when he started. No amount of kick start or tow start is working.
Drained the carb, fuel is coming through fine, cleaned the plug but thats the extent of my experience with dirt bikes so far as this is my first one but I do all the work on my cars and road bikes myself so whats next?? :blank:

[Danger]

Try a new plug.

[MSTRS]

Try a new plug.

This man is correct. A fouled plug is not really cleanable.

[Taz]

You had mixed the gas I assume??

[CaMo]

yea my money is on the plug. Cleaning it in a proper spark plug cleaner is alright but just wiping it never seemed to work for me?

[GR81]

vote #3 for the plug

[JT.]

Pitty no motorbike shops open today, will get a new plug tomorrow.

Gave it a real good clean and it started and ran for a minute just sitting, revved up and idled ok but then cut out again and no luck since.

Whats the theory behind a fouled plug not being able to be cleaned?


You had mixed the gas I assume??

Yeah, had a full tank of 40:1 with yamalube semi synth. Used about 1/3 of it the night before so no issues there.

[cheese]

I found that you can clean an old plug and then spray it with some CRC or WD40 and ti will give it a short life again.

Anyway get a new plug. Go to BnT or repco and they are alot cheaper!!

[mxracer_nz]

id also check your air filter, you say you road down the river you go through any water? i dont supose you covered the filter when you washed it? you may have sucked sum water

[CaMo]

another thing to note is I have found the yamalube to foul plugs far easier (well the 2R racing shit anyway).

I use to run it at 32:1 and had problems so I changed to Motul and kept it at 32:1, didn't change the jetting or anything else and have not fouled one since!!

This is not the first time I have found this. Years ago I had the exact same thing happen on a KDX200 ;)

The 2R stuff is all good for motocross where you are thrashing the bike the whole time however if you start putting around it fouls up in about 30sec or so from my experience.

Letting it idle for a min doesn't help I spose. Keeping light short throttle blips while warming it up is probably better - helps burn the oil off.

[telliman]

sounds like you need to buy a kawasaki! problem solved.

[Pierce]

sounds like you need to buy a kawasaki! problem solved.

:nono:
Why would you try put the fella wrong like that haha

I'd also do as cam said and change the oil your using. fully synth is what i'm running. Motul

[CaMo]

:nono:
Why would you try put the fella wrong like that haha

I'd also do as cam said and change the oil your using. fully synth is what i'm running. Motul

haha!

yea I'd change the oil aswell if your not only running it for mx

[-df-]

another thing to note is I have found the yamalube to foul plugs far easier (well the 2R racing shit anyway).

I use to run it at 32:1 and had problems so I changed to Motul and kept it at 32:1, didn't change the jetting or anything else and have not fouled one since!!

This is not the first time I have found this. Years ago I had the exact same thing happen on a KDX200 ;)

The 2R stuff is all good for motocross where you are thrashing the bike the whole time however if you start putting around it fouls up in about 30sec or so from my experience.

Letting it idle for a min doesn't help I spose. Keeping light short throttle blips while warming it up is probably better - helps burn the oil off.

Hmmm...this sounds like my fouling problem right there!! I'm running yamalube and go thru a couple of plugs a ride now (I'm a 2 stroke pansie).

Time to change oil.

[cheese]

Just use TTS, its well priced and available everywhere.

[CaMo]

Hmmm...this sounds like my fouling problem right there!! I'm running yamalube and go thru a couple of plugs a ride now (I'm a 2 stroke pansie).

Time to change oil.

yea took me a while to figure it out. Was mainly a problem down long steep hills cause your trying to keep giving it alot of revs aswell as not fall off or else it starts bogging and when that happens its normall dead by the bottom.

[JT.]

:nono:
Why would you try put the fella wrong like that haha

I'd also do as cam said and change the oil your using. fully synth is what i'm running. Motul

This is my fourth yama, first proper off road bike but you'd have to pay me to own a kwaka :bleh:

New plug did it, got a BR8EG. Started first pop and been out for the last hour an half with no probs. Really wants to be thrashed, even more so than mates bikes which I've spent a bit of time riding so I think I might try the tts as I know they were all running it.

[Danger]

Good one, glad it worked out!

[Buddy L]

My friend has a yz250 "02 model"sitiing in his garage, sitting their with a fouled plug for the last 7-8 months, dosen't listen when i say "new spark plug and new fuel"
will fix it a treat.
But thein i think hes over riding the bike anywhere other then on the beach.

[ShiFty268]

My friend has a yz250 "02 model"sitiing in his garage, sitting their with a fouled plug for the last 7-8 months, dosen't listen when i say "new spark plug and new fuel"
will fix it a treat.
But thein i think hes over riding the bike anywhere other then on the beach.

Tell him to harden up!

[crazyxr250rider]

After using Motul 800 I would recomend it to any one.
Used it at 32;1 in the KTM250 I just re-built with 95 and 8IEX plug had no problems bike ran sweet.