Planet Minis

russer456 · 08-31-2008, 10:25 PM

My son has a ktm 50 and the other day at the track it had a weird sputter it ran ok just had a weird sputter in a spot in the throttle. As the day went on the bike was harder an harder 2 start but it started and when he was taking it back to trailler it started to sputter real bad and went blahhhhhh and died and wouldn't start again I took it home and washed it and tried 2 start it just would start n die start n die so changed plug and it started up but ran with a bad sputter it acted as it was loaded up real bad but won't clear up could this be electrical anyone that has any ideas I'm open to them thanks for your time

SUZUKIRM12594 · 08-31-2008, 10:31 PM

Sounds like clogged jets and a fouled plug to me...Clean your jets, change the plug, and while youre at it, clean your air filter if you havent already done so

. Some fresh premix wouldnt hurt either if its been sitting for a while.

CJsDad · 08-31-2008, 11:09 PM

Couple things to check for. Check the ground wire on the frame under the seat. Sometimes they come loose or dirt builds up under them. Check the reeds. Pull them out and hold them up to a light. If you see light thru the edges, its time for new ones. take the clutch apart and clean the washers and make sure the stack is within specs. Make sure the jets are clean. If none of that works, chances are your stator is bad.
Try KTMTalk.com if you need more help. There is a whole section on the KTM 50's and lots of good info.

darkrider001 · 09-01-2008, 05:49 AM

Quote:

Originally Posted by CJsDad

Couple things to check for. Check the ground wire on the frame under the seat. Sometimes they come loose or dirt builds up under them. Check the reeds. Pull them out and hold them up to a light. If you see light thru the edges, its time for new ones. take the clutch apart and clean the washers and make sure the stack is within specs. Make sure the jets are clean. If none of that works, chances are your stator is bad.
Try KTMTalk.com if you need more help. There is a whole section on the KTM 50's and lots of good info.

second that. plus check kill button.

geof · 09-01-2008, 08:08 AM

On the KTM the little spade connector onto the coil has a tendency to become loose over time - pull it off clean it up and crimp it up with a pair of pliers and re-attach it.

We had the same problem on our 50 pro Senior race bike. Cured it in the end by soldering a net spade connector on

However, do check jets and clean carb out as suggested above.

08-31-2008, 10:25 PM	#1 (permalink)
russer456 PM Newbie Join Date: Aug 2008 Posts: 2	ktm 50 sputters My son has a ktm 50 and the other day at the track it had a weird sputter it ran ok just had a weird sputter in a spot in the throttle. As the day went on the bike was harder an harder 2 start but it started and when he was taking it back to trailler it started to sputter real bad and went blahhhhhh and died and wouldn't start again I took it home and washed it and tried 2 start it just would start n die start n die so changed plug and it started up but ran with a bad sputter it acted as it was loaded up real bad but won't clear up could this be electrical anyone that has any ideas I'm open to them thanks for your time

08-31-2008, 10:31 PM	#2 (permalink)
SUZUKIRM12594 3rd Gear Member Join Date: Jun 2008 Location: Glendale California Posts: 2,449	Re: ktm 50 sputters Sounds like clogged jets and a fouled plug to me...Clean your jets, change the plug, and while youre at it, clean your air filter if you havent already done so. Some fresh premix wouldnt hurt either if its been sitting for a while. Last edited by SUZUKIRM12594; 08-31-2008 at 10:33 PM.

08-31-2008, 11:09 PM	#3 (permalink)
CJsDad 3rd Gear Member Join Date: Jan 2007 Location: BrookPark, Ohio Posts: 1,350	Re: ktm 50 sputters Couple things to check for. Check the ground wire on the frame under the seat. Sometimes they come loose or dirt builds up under them. Check the reeds. Pull them out and hold them up to a light. If you see light thru the edges, its time for new ones. take the clutch apart and clean the washers and make sure the stack is within specs. Make sure the jets are clean. If none of that works, chances are your stator is bad. Try KTMTalk.com if you need more help. There is a whole section on the KTM 50's and lots of good info.

09-01-2008, 08:08 AM	#5 (permalink)
geof Moderator Join Date: Feb 2004 Location: "Over the Pond" Posts: 74	Re: ktm 50 sputters On the KTM the little spade connector onto the coil has a tendency to become loose over time - pull it off clean it up and crimp it up with a pair of pliers and re-attach it. We had the same problem on our 50 pro Senior race bike. Cured it in the end by soldering a net spade connector on However, do check jets and clean carb out as suggested above.

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