hey all well my klx 250sf i just got isnt starting up that well here in cleveland i pull the choke out and i just keep on tryin to start it till my battery is dead practically about 8 trys..i had to recharge battery other day once it is started it idles nice i need to let it warm up a long time before i ride it or it stalls..i dont no i guess i just wish it would start on the 1st or 2nd try specially when i just had it running previous day just got it less than a week ago 351 fmfq4 on it no nothing about bikes at all but going to try and learn just is frusterating tryin to start it then losing your battery while doin it. hope its dif. when it gets warm...

 

It will get better when it warms up. There is info here on how ot fix it but you must take the carb apart and if it's stock drill it or if it's been changed maybe jetting.

 

Have you looked at any of the threads on here regarding the cold start issue? Enlarging the enricher jet is the way to really fix it, but as I said in your other thread, there are workarounds. The workaround that i used was to slowly pull the choke after I started cranking the bike over. Worked every time for me. There are a few other ways that also work. Look them up.
Dan

 

A shot of starting fluid in the air box will aid in cold starts.

 

Its a known issue with these bikes, they are hoooooorrid at starting.
It does get better with warmer weather though.
One thing that has helped mine is to shut off the fuel before you shut down the bike to park it, let as much gas run out of the system as possible, best if all of it runs out.
If its not all ran out, when you go to start it again, pull the choke and crank it a couple times, then turn the fuel on, should get started then.

What will REALLY help it start is what I just had done.
I had an FMF Powercore 4 pipe, Megabomb header, highflow filter, and reject done.
The bike starts ALOT better now.... oh yea and runs better too, good bit more bottom end.

 

I have had the cold start issue both bone stock and after rejetting and other mods. As the final solution, I will drill the starter jet when I have the carb off again, but until then...I use a method I read either here or on the ADV boards.

What I have found to work, so far even in temps as low as about 10 degrees F, is shaking the bike side to side (somewhat rapidly) while pressing the start button. Doing that, it will fire off quite quickly. The reason this works is the fuel sloshing in the float bowl allows extra (excessive) fuel into the carb, and since the engine is turning at the same time it is able to pull in that extra fuel, and ultimately start. Essentially it's acting like a false enrichment circuit.

If I shake my bike the same way without trying to start it, the extra fuel will flow out of the overflow vent, rather than into the engine.

What I like most about this method is there is no ritual to it. When I'm done riding, I hit the kill switch and walk away. When I'm ready to start the bike cold, I pull the choke and hit the starter; if it doesn't fire right away, I shake the bike and it starts. It doesn't matter if the bike has been unused for a day or a month. The only way to make it simpler will be the necessary internal carb mod, which I will do because I don't want to always resort to the shake it method.

 

Guess it depends on the bike and who you ask

Mine's never taken more than a second or two of cranking to start, starts all the time, every time, weather it's 20° or 90° out.

 

A tip I got from here is to roll the throttle WFO for around 8 seconds, pull the choke and engage the starter. It seems to work for me. These bikes are really cold blooded. I even have to use the choke if I'm off the bike for an hour or so for lunch. I let the bike warm up for a good 10 minutes before I ride. My Honda's are cold blooded too, but they start better.

I also shut the fuel off and allow the carb to run dry. I do this with all my bikes. I may not get to ride for a few days and it seems auto fuel goes bad real quick and bikes are sensitive about that.

 

Hello Guy’s and Girl’s, As you can tell I’m a Newbie,
But I guess we all share a common problem with the 2010 Kawasaki KLX 250S.
Which is the hard starting. When I purchased mine a few days ago, And went to pick it up the Dealer had it running for me, so I could get on it and ride away, Which I did. The next morning I went out to go to work and it took me about 5 minutes to get it to start, I called the Dealer and he said they all have that problem, But for $60.00 I could bring it back in and they would drill out a jet that would solve the issue. I asked him #1 why should I have to pay for a fix they already know about and shouldn’t it be taken care of under warranty, He said the warranty did not cover it because it is a modification and not considered a repair. I checked here and on a few other sites
and found that modification is illegal, Because of smog laws. I told him I could not believe Kawasaki would sell a brand new product knowing they had this problem. I called a different Dealer and there Service told me to bring it in and they would fix it and charge Kawasaki and would not do any modifications, They said if I do start making modifications it could void my warranty. I also e-mailed my local Kawasaki Manufacture / Dealer and below is there reply. Keep in mind I live in Calif. And the weather has been in the 60’s and 70’s

There e-mail: reply
Thanks for your email. We understand your concern.
It sounds like your bike has a problem to us. Moreover, we have had a few KLX250S models in particular that very hard starting in cold weather. Your bike may have a defective automatic compression release. The fix is simple and your dealer can get this information by giving our technical services hotline a call.
We apologize for any inconvenience, but are certain that this can be remedied.
If you have any questions, please give me a call.
Best to you,
Consumer Services
Kawasaki Motors Corp., U.S.A.

I also asked if the following: Which I found on there web site Tech. Sheet was False Advertising , You’ll notice he didn’t answer that question.

Electric Starting
• Quick and easy push-button starting
• Kawasaki Automatic Compression Release (KACR) automatically lifts one of the exhaust valves at cranking rpm, for reduced starting effort.
I will be taking the bike in to the dealer either tomorrow or Tuesday, They are closed on Monday.
I’ll let you al know what they come up with.

 

The bike should start. NOT ALL of them have the problem. Mine started all except a few times when it was really cold and sat for a week. Then I drilled out the starter jet and problem gone for ever. Turning the fuel off helps.

David