13 kx250f starting/idle issues? Valves?

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8/17/2018 9:27 AM

2013 kx250f. I have 95 hours on my bike on original motor and valves have never been clearenced. I don't know how they made it this long. My bike is just now starting to show signs that they need adjustment(I think). My bike will start in a few kicks at the beginning of the day but it won't idle for very long. Almost sounds like it wants to cut out every 5 seconds until it dies. Once I get it warmed up it will idle. But then it will get very difficult to start. I found that for some reason it will start when I give it gas as I kick. I don't understand though because it is fuel injected. Why is this? I also noticed once in a while when I kick the starter I feel like snap or something. Yes I have been pushing the starter to compression and then kicking. Could all this point to my valves or what's up with it? My bike seems fine when I ride though.

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8/17/2018 9:55 AM

Check valve clearances.
Check and or replace cam chain.
Check fuel pump and filter.
Clean fuel injector.

Paw Paw

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8/17/2018 10:02 AM

Paw Paw 271 wrote:

Check valve clearances.
Check and or replace cam chain.
Check fuel pump and filter.
Clean fuel injector.

Paw Paw

X2.

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8/17/2018 10:04 AM

Paw Paw 271 wrote:

Check valve clearances.
Check and or replace cam chain.
Check fuel pump and filter.
Clean fuel injector.

Paw Paw

Any idea why it starts when I give it gas when I kick. I don't understand. Its F.I

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8/17/2018 12:14 PM
Edited Date/Time: 8/17/2018 1:27 PM

Either idle set too low, TPS is not set correctly or fuel injector is dirty.
You do understand it's past time for a new top end and timing chain as well, correct?

Paw Paw

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8/17/2018 1:29 PM

Lmaoo false alarm. Idle was way too low ?. Turned her back up to 2000 rpm. Thanks for all the suggestions guys.

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8/17/2018 1:34 PM

Paw Paw 271 wrote:

Either idle set too low, TPS is not set correctly or fuel injector is dirty.
You do understand it's past time for a new top ...more

Oh yeah I'm aware. However it does vary quite a bit from bike to bike and how its been ridden and maintained. In my case, it's been very well maintained all it's life and about half it's life very lightly ridden. Mechanic checked out the top end for me at about 60 hours and said I had another season in her. She's probably nearing the end lol. Still has good compression amd power though.

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8/17/2018 1:53 PM

I wouldn't ignore it. unless you lowered the idle theres no reason it would just lower on its own. You might be compensating for an issue by raising the idle up. You would be crazy not to do a top end in that bike asap. What could cost you a couple hundred now may cost a couple thousand if you completely blow it up.

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8/17/2018 1:55 PM

fourfourone wrote:

I wouldn't ignore it. unless you lowered the idle theres no reason it would just lower on its own. You might be compensating ...more

X2

Paw Paw

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8/17/2018 2:13 PM

Id prob still consider doing a valve job at 95 hours. Im not sold they havent moved

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8/17/2018 2:13 PM

fourfourone wrote:

I wouldn't ignore it. unless you lowered the idle theres no reason it would just lower on its own. You might be compensating ...more

Pretty sure I twisted it a few times here and there over time when pulling the idle valve out. Bike shows no signs of top end wear. However I am getting it checked out soon

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8/17/2018 2:14 PM

kb228 wrote:

Id prob still consider doing a valve job at 95 hours. Im not sold they havent moved

I agree lol. Gonna take it to my mechanic soon

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