Engine problem's????

kaw rider9
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kaw rider9
Edited Date/Time 1/26/2012 4:51pm
1998 KX 250 smoker.

Start's right up, Idle's fine, Run's fine till I wick it open, Then sputter's bad!!!

I clean my filter after every ride. I took off my carb and cleaned it knowing damn well that wasen't the problem. Still sputter's... Took off my top end to see if the exhaust valves were gummed up. Clean as a whistle.. Reed's look fine. Repacked the silencer, Even though it wasen't ready(Did it about a month ago).

The O-Ring's on the pipe a worn a little(Where it goes in the head). But I can't see that making it run poorly. Can it?? I'll replace them after work but I really don't think that's my problem!!

Could it be an electrical problem?? I don't see how, But that's all that's left. What the hell am I missing?? Compression check show's 140 pound's. Book say's spec's are117-168.... Thank's for any help!!!!!
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Cygnus
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Cygnus 6/23/2008 11:02am
6/23/2008 11:02am
What, a problem with a 2 stroke ? No fucking way !
croom mx
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croom mx 6/23/2008 11:03am
6/23/2008 11:03am
Mixture sounds a little rich . Also get some new gas and oil about 40-1 ratio. Plug could be fouled.
kawasa84
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kawasa84 6/23/2008 11:04am
6/23/2008 11:04am
I'm sure you ckd the plug when you did compression ck. but I had this problem when the metal pc that wraps to the electrode broke, or maybe a cracked or chipped reed petal?
kawasa84
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kawasa84 6/23/2008 11:06am
6/23/2008 11:06am Edited Date/Time 4/16/2016 7:22pm
Cygnus is just jealous cause its cheaper to fix whatever it is than his heavy in & out of the shop 4 banger

The Shop

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Camp332
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Camp332 6/23/2008 11:07am
6/23/2008 11:07am
Reeds being cracked, or not sitting tight on the reed block can cause that. Otherwise I got nothin.
Cygnus
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Cygnus 6/23/2008 11:10am
6/23/2008 11:10am
kawasa84 wrote:
Cygnus is just jealous cause its cheaper to fix whatever it is than his heavy in & out of the shop 4 banger
My 450 Honda has never been in a shop. I am training with some WMA pros today here for the national. What are you doing ?
Cygnus
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Cygnus 6/23/2008 11:11am
6/23/2008 11:11am
Probably the pulser coil or CDI going bad . On the 98 dinosaur .
kaw rider9
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kaw rider9 6/23/2008 11:14am
6/23/2008 11:14am
Camp332 wrote:
Reeds being cracked, or not sitting tight on the reed block can cause that. Otherwise I got nothin.
I can see a little air gap when I look through the reed's! Delta V Force. But I have another KX the same year and it look's the same, And run's just fine.

Swapped the plug, but it looked good.

I have recentaly changed from Spectro to Amsoil! Running the same mixture 50-1 like I have since it was new!

Screw you Cygnus!!!! J/K... I can't belive I can't figure this one out!!! WTF!!!

CDI box and coil is gonna be my next guess, But I can't see either one being intermittant!
Cygnus
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Cygnus 6/23/2008 11:16am
6/23/2008 11:16am
If you have another bike . Just swap some parts . I have seen both pulsers and cdi's be intermittant.
kaw rider9
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kaw rider9 6/23/2008 11:18am
6/23/2008 11:18am
Cygnus wrote:
Probably the pulser coil or CDI going bad . On the 98 dinosaur .
What do you mean "Dinosaur"????

She's like new!!! One owner, low mile's, no rust, non smoker(Smoker), Never raced, never abused.......I'm a good salesman!!!! And a liar!!!!!
Cygnus
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Cygnus 6/23/2008 11:19am
6/23/2008 11:19am
There is a reason the franchise shops don't work on bikes over ten years old.
kaw rider9
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kaw rider9 6/23/2008 11:20am
6/23/2008 11:20am
Cygnus wrote:
If you have another bike . Just swap some parts . I have seen both pulsers and cdi's be intermittant.
I'm gonna swap tonight, How the hell can they be intermittant?

I thought it either had spark or not! Guess I was wrong...... Not the first time though!!!!
Cygnus
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Cygnus 6/23/2008 11:23am
6/23/2008 11:23am
CDI's have different circuits for advancing the timing curve. The high rpm side might be fried .
BobbyM
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BobbyM 6/23/2008 11:30am
6/23/2008 11:30am
Cygnus wrote:
What, a problem with a 2 stroke ? No fucking way !
at least it will be a simple problem and a simple fix smartass
kawasa84
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kawasa84 6/23/2008 11:39am
6/23/2008 11:39am
Cygnus, Actually, back in 04' I came up there and rode Lakewood, Berthoud, and Milliken, and Watkins, all in 5 days. Never knew about your place!!!!
todder
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todder 6/23/2008 11:44am
6/23/2008 11:44am Edited Date/Time 6/23/2008 11:46am
Right side crank seal. Absolutely 90% positive. Seen this alot on those.

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kaw rider9
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kaw rider9 6/23/2008 11:58am
6/23/2008 11:58am
todder wrote:
Right side crank seal. Absolutely 90% positive. Seen this alot on those.
Replaced it last year for the first time... Started smoking real bad.... No loss in performance, but smoked like a sum bitch!!!!
williamsmotowerx 6/23/2008 12:04pm
6/23/2008 12:04pm
Todder, usually they clean up on top when crank seal goes... but run like crap down low.

cygnus has the right idea with electrical. swap stator first, then CDI.. almost never coil

eh, swap CDI first since it's easiest... but more than likely it's your stator.
bogdan912
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bogdan912 6/23/2008 12:46pm
6/23/2008 12:46pm
This is easy. Remove grips install yz250f.
Lightning78
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Lightning78 6/23/2008 12:49pm
6/23/2008 12:49pm Edited Date/Time 4/16/2016 7:22pm
kaw rider9 wrote:
1998 KX 250 smoker. Start's right up, Idle's fine, Run's fine till I wick it open, Then sputter's bad!!! I clean my filter after every ride...
1998 KX 250 smoker.

Start's right up, Idle's fine, Run's fine till I wick it open, Then sputter's bad!!!

I clean my filter after every ride. I took off my carb and cleaned it knowing damn well that wasen't the problem. Still sputter's... Took off my top end to see if the exhaust valves were gummed up. Clean as a whistle.. Reed's look fine. Repacked the silencer, Even though it wasen't ready(Did it about a month ago).

The O-Ring's on the pipe a worn a little(Where it goes in the head). But I can't see that making it run poorly. Can it?? I'll replace them after work but I really don't think that's my problem!!

Could it be an electrical problem?? I don't see how, But that's all that's left. What the hell am I missing?? Compression check show's 140 pound's. Book say's spec's are117-168.... Thank's for any help!!!!!
Let me know as soon as you find out I am having the same problem with my 02 CR250 smoker, had to turn the idle way up just to get it to idle. When it first started happening I pulled the reeds and yes the bottom one was missing a small chunk about the size of a pinky nail. Put new OEM one's in cleaned the carb and rejetted ..... still doing it whenever I crack the throttle hard but not when I roll it on easy and yes it does clean out on top but sputters heavily in the low-mid....can a worn out top end really have this effect?

(Recently bought it used so I dont know when the top end was last done)
rallendude
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rallendude 6/23/2008 2:30pm
6/23/2008 2:30pm
It's a good bit hotter around here than it's been for the last few months. Have you tried leaning the jetting out a little? Try dropping the main one or two sizes (i.e 180 to 175) and drop the needle one position.
Phlapjax
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Phlapjax 6/23/2008 2:49pm
6/23/2008 2:49pm
swap out engine with the one in the porsche.
kaw rider9
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kaw rider9 6/23/2008 2:57pm
6/23/2008 2:57pm
Phlapjax wrote:
swap out engine with the one in the porsche.
I don't wan't a four stroke!!Silly

Go read the second page of the 09 stuff thread...

I'm savin' my pennies for a Service Kawasaki 500!!!!!!!!!!

Think I'm big enough? 5'-7", a buck fourty two...... HA HA, Big guy!!!!!

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