Maintenance & Technical > KX250 / KX125
Cold start problem.
Jopiz:
Im having a problem starting my '91 125. I managed to get it running a few days ago when temperature was a little above freezing ( 0?c, 32?F). It ran nice and cleanly. When temperature dropped below freezing, im unable to get it running. Im sure it fires and spark should be ok. Smoke is coming every time i try to kick start. I got it running about 5 seconds but suddenly it just died. Carb is cleaned and no dirt or anything suspicious was found. Is something freezed? I tried to use starter spray but it didnt seem to make a difference. It worked last time. Any help is appreciated.
- Jopiz
Albertan:
That's pretty cold; was it starting with or without choke? I suspect that if it is jetted for normal summer temperatures, it would be pretty lean at 0C.
Friar-Tuck:
Jo,
I'm wondering if something else is going on here, pull the plug and take a whiff, (I know sounds crazy). I had the crank seal go south on my CR and it was running great one day next time I tried to start it I fouled a plug and it smelled like gear lube. The clutch side will suck gear lube from the tranny and exhibit the hard starting and plug foul. If I remember correctly Cam 22 suggested measuring gear oil at change interval. A few ml is no big deal, but if your losing more than an Oz. or two you've got a bad crank seal.
Like Al said thats pretty cold, but starting ether should have gotten her to fire, if when you pull the plug there should be some fuel on it (wet).
(There will be some more guys posting in the next few days after things settle down after Christmas. Try not to get discoureaged)
Tuck\o/
Jopiz:
Hey!
I pulled the plug and it didnt smell like gear lube. It was fouled and debris was found. I also took my pipe off. There were about a 50ml of unburned fuel and oil inside it. Im going to replace the crank seal anyways. Any suggestions what to try next?
-J
Friar-Tuck:
Jo,
I don't want to lead you down a rabbit trail, but the flooded condition your talking about would point to the carby. The crank seal usually will only draw trans lube while its running.
50mls is like a Nyquil medicine cup full right? I think you would be able to tell the difference between premix oil and gear lube with that amount in the cyl.
If you haven't already taken down the the sidecover and all, snoop around the carb and and maybe the reed's.
You said earlier the carb was clean, is it possible the main or pilot worked itself loose?
Do you have enough room to loosen the carb and remove the bowl? Even if you had to pull the cap and slide, rotate the carb and remove the bowl it's alot less work than the crank seal.
The only other thing that comes to mind is with the temp's as low as you're talking about would it be possible your premix is separating? I recall certain oils have recommended temps on the bottle and some specific for cold weather.
Is your bike/fuel stored in unheated shed/garage?
If nothing else changed from the time you got her to run a few weeks ago and now is the weather....Hmmm...
I guess other than that start with the basics and hang in there. Clean filter, fresh fuel, plug, Gap, connections, kill switch, plug wire, coil, flywheel key, cd box,.
If you make any changes (carb Jetting) keep a notebook on what all you've done.
After a few frustrating days I would forget what all I did and then didn't have baseline as to where I started and what finally "Got it Running".
You may be able to find a used service manual (or new if you have the $'s) at Amazon or ebay etc. Most guys have a Clymer as the are about half of the OEM service Manual.
Wish I could be more help,
Tuck \o/
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