Hard to Start - KX 250

greggm263
Profile picture for user greggm263
Posts
7
Joined
8/25/2011
Location
Vestal, NY, USA
greggm263
Edited Date/Time 1/27/2012 2:40pm
My son has a 2010 KX 250. We have trouble starting the motorcycle after a fall over. Besides the fact that you shouldn't crash or fall over, is there something that can be done to make the bike start easier or is something wrong? It seems like it takes 50 kicks or more to get it started again. By that time, you are in last place.

Thanks
|
mxtech1
Profile picture for user mxtech1
Posts
1968
Joined
7/21/2011
Location
Galesburg, IL, USA
mxtech1 8/25/2011 10:35am
8/25/2011 10:35am
Sounds like you might need to adjust your air fuel mixture screw or go up a siz on your pilot. It probably isn't getting enough air when it's hot. If you have to hold the throttle open to get it started, the above is likely.
greggm263
Profile picture for user greggm263
Posts
7
Joined
8/25/2011
Location
Vestal, NY, USA
greggm263 8/25/2011 1:00pm
8/25/2011 1:00pm
Thank you for the response.

Would you happen to know what the standard number of turns are for the air/fuel mixture screw on a KX 250F 2010?
mxb2
Profile picture for user mxb2
Posts
22437
Joined
6/15/2010
Location
Bowie, MD, USA
mxb2 8/25/2011 2:04pm
8/25/2011 2:04pm
greggm263 wrote:
Thank you for the response. Would you happen to know what the standard number of turns are for the air/fuel mixture screw on a KX 250F...
Thank you for the response.

Would you happen to know what the standard number of turns are for the air/fuel mixture screw on a KX 250F 2010?
IMO , if your gonna keep the bike for awhile, you might want to purchase a service manual or owners manual! I am assuming you meant kxf 250 since you said it was a 2010? How many hours on bike? might need valves?
greggm263
Profile picture for user greggm263
Posts
7
Joined
8/25/2011
Location
Vestal, NY, USA
greggm263 8/25/2011 4:18pm
8/25/2011 4:18pm
The bike probably has about 10 hrs on it

The Shop

See All »
mxtech1
Profile picture for user mxtech1
Posts
1968
Joined
7/21/2011
Location
Galesburg, IL, USA
mxtech1 8/26/2011 5:43am
8/26/2011 5:43am
greggm263 wrote:
Thank you for the response. Would you happen to know what the standard number of turns are for the air/fuel mixture screw on a KX 250F...
Thank you for the response.

Would you happen to know what the standard number of turns are for the air/fuel mixture screw on a KX 250F 2010?
In your title you said kx250 not kx 250f.

You can still try adjusting air/fuel mixture, 1.5 to 2.5 turns out. If you are outside of this effective range, you defentily need a pilot jet change. Unfortantely on the 4 strokes this problem is not easy to fix like a 2 stroke. It can be anything from too lean of needle, pilot jet, air/fuel mixture, and acc pump. I can't really help you much. You'll just have to play with it.

Like someone already said, get a service manual. there is a good troubleshooting guide in the back with a section on jetting that is very helpful.
greggm263
Profile picture for user greggm263
Posts
7
Joined
8/25/2011
Location
Vestal, NY, USA
greggm263 8/26/2011 6:36am
8/26/2011 6:36am
Hey.. that's a start. Thank you for the advice. I will try a few things and let ya know.

Post a reply to: Hard to Start - KX 250