23 KTM 300SX

OCgoon1533
Posts
86
Joined
3/28/2022
Location
Yorba Linda, CA US
11/28/2022 11:05am
Kris Keefer has some base settings in his review podcast and he goes through all three of those. Give it a listen.
7/11/2023 12:32pm

ff448b55-fbf7-4e95-9064-48dab76dd4d2.jpeg?VersionId=k64wirKgbmCxGbC8o2C

 42a7eeed-47f1-43c1-82f0-bb85845dba5e.jpeg?VersionId=77HnFkFN7yEAlJbxdRKgYB1Ovyle

 3447eebb-03f7-4c57-b110-77e71ce404cf

 5cbc71a6-f1f8-45af-b3ec-9cd3a76f131a

 6e8076b7-2d0c-488c-ab39-fad88efc79f9.jpeg?VersionId=ojgrG8oUriQKfj2

 710547f1-6522-4580-919b-46361a1e13b1

 Mine did this after 22 hours . Anyone else seen this on any others 

3
7/11/2023 12:40pm
           Mine did this after 22 hours . Anyone else seen this on any others 

ff448b55-fbf7-4e95-9064-48dab76dd4d2.jpeg?VersionId=k64wirKgbmCxGbC8o2C

 42a7eeed-47f1-43c1-82f0-bb85845dba5e.jpeg?VersionId=77HnFkFN7yEAlJbxdRKgYB1Ovyle

 3447eebb-03f7-4c57-b110-77e71ce404cf

 5cbc71a6-f1f8-45af-b3ec-9cd3a76f131a

 6e8076b7-2d0c-488c-ab39-fad88efc79f9.jpeg?VersionId=ojgrG8oUriQKfj2

 710547f1-6522-4580-919b-46361a1e13b1

 Mine did this after 22 hours . Anyone else seen this on any others 

Holy shi. Looks like a hand grenade went off in there. 

The Shop

langhammx
Posts
8904
Joined
5/5/2011
Location
Santa Clarita, CA US
Fantasy
323rd
7/11/2023 12:41pm
           Mine did this after 22 hours . Anyone else seen this on any others 

ff448b55-fbf7-4e95-9064-48dab76dd4d2.jpeg?VersionId=k64wirKgbmCxGbC8o2C

 42a7eeed-47f1-43c1-82f0-bb85845dba5e.jpeg?VersionId=77HnFkFN7yEAlJbxdRKgYB1Ovyle

 3447eebb-03f7-4c57-b110-77e71ce404cf

 5cbc71a6-f1f8-45af-b3ec-9cd3a76f131a

 6e8076b7-2d0c-488c-ab39-fad88efc79f9.jpeg?VersionId=ojgrG8oUriQKfj2

 710547f1-6522-4580-919b-46361a1e13b1

 Mine did this after 22 hours . Anyone else seen this on any others 

That’s a shame. I personally haven’t seen any failures on the 12+ bikes in my riding group. But there has been a few reports of the piston hitting the crank, which could lead to a situation like you have here. 
It seems like most/ all the failures have been with the SX 250/300, but that doesn’t make much sense, since they are the same motors/ ECU as the XC models. 
Maybe riding them harder at the motocross track leads to this, I don’t know… 

But mine have been very solid, with no issues 

KTM47
Posts
26
Joined
6/22/2023
Location
Davenport, FL US
7/11/2023 2:00pm

Ours has been great for 4 months and around 20 hours now. But last week wouldnt start on the button, just turns the motor but wont fire. Then the button is dead for about 10-15 minutes, so seems like the ECU is preventing it from starting then shutting of the start button.

Will start easily with a bump start and run perfectly with no flashing codes.

Changed the battery, plug and start/stop button but that changed nothing and it does exactly the same. Its going to a dealer tomorrow to plug in to a KTM diagnostic tester, hopefully they find something, although no lights flash so the bike thinks its OK, once we start it.

langhammx
Posts
8904
Joined
5/5/2011
Location
Santa Clarita, CA US
Fantasy
323rd
7/11/2023 2:36pm Edited Date/Time 7/11/2023 2:37pm
KTM47 wrote:
Ours has been great for 4 months and around 20 hours now. But last week wouldnt start on the button, just turns the motor but wont...

Ours has been great for 4 months and around 20 hours now. But last week wouldnt start on the button, just turns the motor but wont fire. Then the button is dead for about 10-15 minutes, so seems like the ECU is preventing it from starting then shutting of the start button.

Will start easily with a bump start and run perfectly with no flashing codes.

Changed the battery, plug and start/stop button but that changed nothing and it does exactly the same. Its going to a dealer tomorrow to plug in to a KTM diagnostic tester, hopefully they find something, although no lights flash so the bike thinks its OK, once we start it.

I did have an issue with the OEM start/stop button shorting out and draining my battery. I replaced it with the Motominded BBS button and charged the battery. Everything has been ok since… the stock start/stop button is a piece of junk

post up your findings after the dealer checks it out, I’m curious as to what happened to yours. 

wrc777
Posts
2176
Joined
5/21/2020
Location
Greenwood, IN US
Fantasy
1130th
7/11/2023 2:38pm
KTM47 wrote:
Ours has been great for 4 months and around 20 hours now. But last week wouldnt start on the button, just turns the motor but wont...

Ours has been great for 4 months and around 20 hours now. But last week wouldnt start on the button, just turns the motor but wont fire. Then the button is dead for about 10-15 minutes, so seems like the ECU is preventing it from starting then shutting of the start button.

Will start easily with a bump start and run perfectly with no flashing codes.

Changed the battery, plug and start/stop button but that changed nothing and it does exactly the same. Its going to a dealer tomorrow to plug in to a KTM diagnostic tester, hopefully they find something, although no lights flash so the bike thinks its OK, once we start it.

TPI bikes would stop the spark if the compression got too low. I don't know if the TBI have that same start logic or not.

sandman768
Posts
5958
Joined
3/21/2014
Location
Saratoga Springs, NY US
7/11/2023 5:21pm

Ouch… wonder if coolant was seeping into combustion chamber? Hydro lock? 

7/11/2023 5:24pm
           Mine did this after 22 hours . Anyone else seen this on any others 

ff448b55-fbf7-4e95-9064-48dab76dd4d2.jpeg?VersionId=k64wirKgbmCxGbC8o2C

 42a7eeed-47f1-43c1-82f0-bb85845dba5e.jpeg?VersionId=77HnFkFN7yEAlJbxdRKgYB1Ovyle

 3447eebb-03f7-4c57-b110-77e71ce404cf

 5cbc71a6-f1f8-45af-b3ec-9cd3a76f131a

 6e8076b7-2d0c-488c-ab39-fad88efc79f9.jpeg?VersionId=ojgrG8oUriQKfj2

 710547f1-6522-4580-919b-46361a1e13b1

 Mine did this after 22 hours . Anyone else seen this on any others 

There's been several failures like this in my area. The guy I know is an A rider with around 20hrs on the bike

7/11/2023 5:48pm
           Mine did this after 22 hours . Anyone else seen this on any others 

ff448b55-fbf7-4e95-9064-48dab76dd4d2.jpeg?VersionId=k64wirKgbmCxGbC8o2C

 42a7eeed-47f1-43c1-82f0-bb85845dba5e.jpeg?VersionId=77HnFkFN7yEAlJbxdRKgYB1Ovyle

 3447eebb-03f7-4c57-b110-77e71ce404cf

 5cbc71a6-f1f8-45af-b3ec-9cd3a76f131a

 6e8076b7-2d0c-488c-ab39-fad88efc79f9.jpeg?VersionId=ojgrG8oUriQKfj2

 710547f1-6522-4580-919b-46361a1e13b1

 Mine did this after 22 hours . Anyone else seen this on any others 

There's been several failures like this in my area. The guy I know is an A rider with around 20hrs on the bike

Interesting. I’m an a rider too . I messaged the shop I got it from and they said that the pistons in them aren’t very strong but Ktm won’t do anything about it 

sandman768
Posts
5958
Joined
3/21/2014
Location
Saratoga Springs, NY US
7/11/2023 5:58pm
Interesting. I’m an a rider too . I messaged the shop I got it from and they said that the pistons in them aren’t very strong...

Interesting. I’m an a rider too . I messaged the shop I got it from and they said that the pistons in them aren’t very strong but Ktm won’t do anything about it 

I would escalate that with a call to a KTM customer service rep or regional rep….

KTM47
Posts
26
Joined
6/22/2023
Location
Davenport, FL US
7/12/2023 9:52am

Ours has been in the dealership for 2 hours at $115/hour and still not fixed. They have just asked my son who took the bike about going into the 3rd hour. If they can fix it after that we still pay $345 and take the bike home in the same condition we took it in.

Is that right?

urbanlift707
Posts
890
Joined
9/27/2006
Location
Humboldt, CA US
7/12/2023 10:42am
Interesting. I’m an a rider too . I messaged the shop I got it from and they said that the pistons in them aren’t very strong...

Interesting. I’m an a rider too . I messaged the shop I got it from and they said that the pistons in them aren’t very strong but Ktm won’t do anything about it 

sandman768 wrote:

I would escalate that with a call to a KTM customer service rep or regional rep….

My 2020 tc250 had pretty much same thing happen at 15 hours, only thing left of the piston was the dome. Husky paid for everything, even bought me a new fmf pipe as there was piston chunks inside it. Was super easy too, my dealer took care of everything and instantly got the green light to fix it all. 

8/7/2023 7:34am
           Mine did this after 22 hours . Anyone else seen this on any others 

ff448b55-fbf7-4e95-9064-48dab76dd4d2.jpeg?VersionId=k64wirKgbmCxGbC8o2C

 42a7eeed-47f1-43c1-82f0-bb85845dba5e.jpeg?VersionId=77HnFkFN7yEAlJbxdRKgYB1Ovyle

 3447eebb-03f7-4c57-b110-77e71ce404cf

 5cbc71a6-f1f8-45af-b3ec-9cd3a76f131a

 6e8076b7-2d0c-488c-ab39-fad88efc79f9.jpeg?VersionId=ojgrG8oUriQKfj2

 710547f1-6522-4580-919b-46361a1e13b1

 Mine did this after 22 hours . Anyone else seen this on any others 

Yep got 30hrs out of mine though 

Post a reply to: 23 KTM 300SX

The Latest