05 Kx 250F trouble starting

chas28 · 4 Weeks Ago

I have a 05 Kx250f and I am having trouble starting the bike, there is compression there but i guess not enough to kick it over.

case_sense · 4 Weeks Ago

have u done the normal trouble shooting? check plugs, spark, fuel etc?

KDXGarage · 4 Weeks Ago

When is the last time you checked and adjusted the valves?

case_sense · 4 Weeks Ago

or the jetting

knoxbrendon · 3 Weeks Ago

deff check valves my buddies rmz 250 valves are leaking and the only way it will crank is to roll start it

kxboblarry · 3 Weeks Ago

Check the valves! Before its too late.
New timing chain and time it.
Clean the carb and get a new air filter

KX450_#122 · 2 Weeks Ago

Much agreed with checking the valves if they are sticking open you and you happen to get it started then you may be in a world of hurt and could end up with a couple bent valves (sucks). If my memory serves me correctly the 04 and 05 KX 250Fs had weak valve springs and that was a killer in floated valves and such. Before you start tearing down your bike and removing this and that. start by doing a compression test. There is a tool you can buy that will screw down right into the spark plug hole and you will kick the bike over and have your reading. refer this reading to your manual and start trouble shooting and working from there. Always measure twice and cut once ( old carpenters saying)

4 Weeks Ago	#1 (permalink)
chas28 Newbie Join Date: Oct 2009 Posts: 2	05 Kx 250F trouble starting I have a 05 Kx250f and I am having trouble starting the bike, there is compression there but i guess not enough to kick it over.

4 Weeks Ago	#3 (permalink)
KDXGarage Hey, lemme ride your bike BTK Expert Join Date: Dec 2005 Location: AL, USA Posts: 1,849	When is the last time you checked and adjusted the valves? __________________ DO NOT e-mail me asking for a pdf of a manual!! Get a Freaking JOB like I did, and buy one!

3 Weeks Ago	#6 (permalink)
kxboblarry Full Hot BTK Beginner Join Date: May 2009 Location: Niagara Ontario Posts: 43	Check the valves! Before its too late. New timing chain and time it. Clean the carb and get a new air filter __________________ 2006 KX250f 1992 KX500 1967 Chev C10 1982 Yota P/U

2 Weeks Ago	#7 (permalink)
KX450_#122 #386 & #122 Join Date: Jan 2008 Location: TN Posts: 14	Much agreed with checking the valves if they are sticking open you and you happen to get it started then you may be in a world of hurt and could end up with a couple bent valves (sucks). If my memory serves me correctly the 04 and 05 KX 250Fs had weak valve springs and that was a killer in floated valves and such. Before you start tearing down your bike and removing this and that. start by doing a compression test. There is a tool you can buy that will screw down right into the spark plug hole and you will kick the bike over and have your reading. refer this reading to your manual and start trouble shooting and working from there. Always measure twice and cut once ( old carpenters saying) __________________ John Theros 2003 KX 250 #386 2007 KX 450 #122

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4 Weeks Ago	#2 (permalink)
case_sense Newbie Join Date: Oct 2009 Posts: 5	have u done the normal trouble shooting? check plugs, spark, fuel etc?

4 Weeks Ago	#4 (permalink)
case_sense Newbie Join Date: Oct 2009 Posts: 5	or the jetting

3 Weeks Ago	#5 (permalink)
knoxbrendon Newbie Join Date: Sep 2009 Posts: 3	deff check valves my buddies rmz 250 valves are leaking and the only way it will crank is to roll start it

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