Kx250f bogging accel need help!

GarnerWilson
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Grand Bay, AL US
GarnerWilson
Edited Date/Time 6/21/2013 5:54pm
I just rebuilt my 2005 kx250f. Cut to the chase-I'm lacking power on accel, and it Boggs about a quarter of a throttle out of a berm. It pops on accel too, and I can't get any power coming out of a turn. I've deep cleaned the carb, cleaned every jet and passageway, blew it with compressed air, IT'S CLEAN! I'm already running a 45 on the pilot jet. The stock is a 40. I've adjusted the fuel screw from stock(2.5 turns out) to almost all the way out and all the way back in trying to find a sweet spot and it still lacks power and Boggs. I tried a new accel pump, helped a little on responsive accel. But not enough. Could it be my floats? Could my cam timing be off a hair? Do I need to run richer than I already am with a bigger jet? I have a proper ground, (which would cause popping/sputtering on accel) help me out guys.
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Randy_Nix
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Randy_Nix 6/14/2013 6:45pm
6/14/2013 6:45pm
Is it hard to start? May be a tight valve.

How old is the cam chain? It's possible it has stretched and retarded the timing.

Could be a head gasget.
GarnerWilson
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GarnerWilson 6/15/2013 10:28am
6/15/2013 10:28am
I just rebuilt the engine, new crank, pistons, all new gaskets, valve job, cams, cam chain and guides. I feel like it's not getting enough fuel.
GarnerWilson
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GarnerWilson 6/15/2013 10:31am
6/15/2013 10:31am
And it'll start and idle like a champ. The throttle has so much response to it in neutral. But put it in first and it's hard to get power when I start off. I have to feather the
Clutch a bit.
Bry745
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Bry745 6/21/2013 11:34am
6/21/2013 11:34am Edited Date/Time 6/21/2013 11:43am
Check the stator. I had all kinds of weird issues on a 2009 KX250f I used to own. Ruled out the carb and valves, but ended up being the stator. You can prob pick up a used one on eBay for $100 or so.

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GarnerWilson
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GarnerWilson 6/21/2013 2:07pm
6/21/2013 2:07pm
Ok I'll check that. It's a 2005.
GarnerWilson
Profile picture for user GarnerWilson
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Grand Bay, AL US
GarnerWilson 6/21/2013 5:54pm
6/21/2013 5:54pm
So do you Think it's missing on the spark sometimes?

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