Brand New MC350f cutting out

Grouper
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Grouper
0.0 hours, I’m breaking it in today some and this is what’s going on. Blipping the throttle or rolling into about 1/16th throttle when idling in neutral causes it to make a “spitting” sound which I presume is a backfire and die. Check it out:

https://youtube.com/shorts/M4Blufa4o7k?feature=share

Any ideas? Does your Austrian 4 stroke behave this way?

Thanks everyone.
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AJ565
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AJ565 2/20/2022 2:28pm
2/20/2022 2:28pm
My ‘22 KTM 350 would die out of corners after I put the vented side cover and 2 stroke air cage in it. I had to bump the idle up some and that fixed the problem. It would also do it when cold if I blipped the throttle.
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Grouper
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Grouper 2/20/2022 2:56pm
2/20/2022 2:56pm
AJ565 wrote:
My ‘22 KTM 350 would die out of corners after I put the vented side cover and 2 stroke air cage in it. I had to...
My ‘22 KTM 350 would die out of corners after I put the vented side cover and 2 stroke air cage in it. I had to bump the idle up some and that fixed the problem. It would also do it when cold if I blipped the throttle.
Side note, has anyone ever actually burnt a bike down by backfiring? I want to put a 2T cage in mine as well.

I’m seeing you say that I don’t have a problem then, correct? Just bump the idle up some?
CarlinoJoeVideo
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CarlinoJoeVideo 2/20/2022 3:09pm
2/20/2022 3:09pm
Check the inline fuel filter.

Turn up the idle and 1/8 or 1/4 turn.

How old is the gas?

Anything behind the air filter like a rag?

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Grouper
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Grouper 2/20/2022 3:12pm
2/20/2022 3:12pm
CarlinoJoeVideo wrote:
Check the inline fuel filter. Turn up the idle and 1/8 or 1/4 turn. How old is the gas? Anything behind the air filter like a...
Check the inline fuel filter.

Turn up the idle and 1/8 or 1/4 turn.

How old is the gas?

Anything behind the air filter like a rag?

It was just wheeled out of the showroom I’m thinking it’s probably alright. The tech wasn’t a goober either- we talked. Gas is new, and I’ll take a peek at the fuel filter soon because I’m new to that so I’d like to inspect it to learn about it some anyways.

Also, it’s a little hesitant to start right up so I’m putting another chip in the “idle adjustment” pile. Let me give that a shot tomorrow and we’ll revisit this.

The Shop

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Nate_Z
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Nate_Z 2/20/2022 3:30pm
2/20/2022 3:30pm
I had an EFI KTM a few years back not want to start or spit and sputter brand new. Basically there was a glob of fuel sludge sitting right on top of the injector. Pulled the injector, cleaned it off and ran perfect. Good luck!
Pirate421
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Pirate421 2/20/2022 4:21pm
2/20/2022 4:21pm
Mine would do that all the time when it was new I think it’s not just warmed up enough. Especially when it was brand new. Definitely frustrating but it never became an issue for me.
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AJ565
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AJ565 2/20/2022 6:11pm
2/20/2022 6:11pm
Flame out is the word I was looking for earlier. It seemed to be pretty common and the idle bump up helped a ton. It hasn’t flames out since.
soggy
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soggy 2/20/2022 7:15pm
2/20/2022 7:15pm
Does it die under heavy acceleration from low rpm?

I’m thinking fuel filter too.
Grouper
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Grouper 2/20/2022 8:03pm
2/20/2022 8:03pm
Pirate421 wrote:
Mine would do that all the time when it was new I think it’s not just warmed up enough. Especially when it was brand new. Definitely...
Mine would do that all the time when it was new I think it’s not just warmed up enough. Especially when it was brand new. Definitely frustrating but it never became an issue for me.
Lol you've been helping me since before i decided to buy this thing hahaha.
My YZ was funky until it got about an hour on it as well, so I'm thinking this is the case here too.
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Grouper
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Grouper 2/20/2022 8:07pm
2/20/2022 8:07pm
soggy wrote:
Does it die under heavy acceleration from low rpm?

I’m thinking fuel filter too.
I haven't heavily accelerated it yet lol. atleast, not 100% throttle from the bottom range. However, it will lug itself around like a train and open up quick if I let it.. which has been one time. We're just rolling it around the neighborhood for now.
Grouper
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Grouper 2/20/2022 8:08pm
2/20/2022 8:08pm
Thanks for the suggestions everyone. I'm going to continue the break in process and when that's done I'll go through the fuel system. I do know that the dealer did not put fuel or oil into it until I came and got it. They were adamant that I gave a heads up before coming so they could take the wrap off of it, oil, gas, etc.
Pirate421
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Pirate421 2/20/2022 8:44pm
2/20/2022 8:44pm
Grouper wrote:
Lol you've been helping me since before i decided to buy this thing hahaha. My YZ was funky until it got about an hour on it...
Lol you've been helping me since before i decided to buy this thing hahaha.
My YZ was funky until it got about an hour on it as well, so I'm thinking this is the case here too.
Yep I really can’t see that as a fuel issue. Just let it warm up good and gently roll the throttle before it’s full warm then it will be fine. I even had a video when I first got the bike that my wife took and she’s laughing because I couldn’t even take off up the driveway because it kept cutting off like that. Didn’t have any issues after the break in
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Factor E
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Factor E 2/21/2022 1:11am
2/21/2022 1:11am
IF YOUR BIKE SHOWED 0.0 HRS WHEN PICKED UP THEN THE DEALER DIDN'T
PREP IT:
ECU GETS UNLOCKED AND PARAMETERS CHECKED
MOTOR GETS HEAT CYCLED
IDLE IS SET 1800-1900

WHEN DONE METER SHOULD AT LEAST READ JUST INDER A HR
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Digger29
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Digger29 2/21/2022 7:55am
2/21/2022 7:55am
Adjusting the voltage to the TPS should clear that up.
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Bruce372
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Bruce372 2/21/2022 8:52am
2/21/2022 8:52am
Take it back to the dealer
1
Rickyisms 2/21/2022 8:52am
2/21/2022 8:52am
Factor E wrote:
IF YOUR BIKE SHOWED 0.0 HRS WHEN PICKED UP THEN THE DEALER DIDN'T PREP IT: ECU GETS UNLOCKED AND PARAMETERS CHECKED MOTOR GETS HEAT CYCLED IDLE...
IF YOUR BIKE SHOWED 0.0 HRS WHEN PICKED UP THEN THE DEALER DIDN'T
PREP IT:
ECU GETS UNLOCKED AND PARAMETERS CHECKED
MOTOR GETS HEAT CYCLED
IDLE IS SET 1800-1900

WHEN DONE METER SHOULD AT LEAST READ JUST INDER A HR
Gasgas doesn’t come with an hour meter equipped on it.
MXer391
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MXer391 2/22/2022 8:10am
2/22/2022 8:10am
Grouper wrote:
0.0 hours, I’m breaking it in today some and this is what’s going on. Blipping the throttle or rolling into about 1/16th throttle when idling in...
0.0 hours, I’m breaking it in today some and this is what’s going on. Blipping the throttle or rolling into about 1/16th throttle when idling in neutral causes it to make a “spitting” sound which I presume is a backfire and die. Check it out:

https://youtube.com/shorts/M4Blufa4o7k?feature=share

Any ideas? Does your Austrian 4 stroke behave this way?

Thanks everyone.
I just bought the same bike and this is my 4th 350. There's nothing wrong with it. You can't blip the throttle like that when they aren't warmed up. They are all like that when they are new. After the motor gets broken in, it goes away.
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Grouper
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Grouper 2/22/2022 8:21am
2/22/2022 8:21am
Factor E wrote:
IF YOUR BIKE SHOWED 0.0 HRS WHEN PICKED UP THEN THE DEALER DIDN'T PREP IT: ECU GETS UNLOCKED AND PARAMETERS CHECKED MOTOR GETS HEAT CYCLED IDLE...
IF YOUR BIKE SHOWED 0.0 HRS WHEN PICKED UP THEN THE DEALER DIDN'T
PREP IT:
ECU GETS UNLOCKED AND PARAMETERS CHECKED
MOTOR GETS HEAT CYCLED
IDLE IS SET 1800-1900

WHEN DONE METER SHOULD AT LEAST READ JUST INDER A HR
Rickyisms wrote:
Gasgas doesn’t come with an hour meter equipped on it.
I was being exaggerative when i said that too.. It was just my way of saying it has "0 miles", or no ride time. that video is the second time it's started in my posession. They started it, i heard it.

Pit Row

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Grouper
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Grouper 2/22/2022 8:23am
2/22/2022 8:23am
Grouper wrote:
0.0 hours, I’m breaking it in today some and this is what’s going on. Blipping the throttle or rolling into about 1/16th throttle when idling in...
0.0 hours, I’m breaking it in today some and this is what’s going on. Blipping the throttle or rolling into about 1/16th throttle when idling in neutral causes it to make a “spitting” sound which I presume is a backfire and die. Check it out:

https://youtube.com/shorts/M4Blufa4o7k?feature=share

Any ideas? Does your Austrian 4 stroke behave this way?

Thanks everyone.
MXer391 wrote:
I just bought the same bike and this is my 4th 350. There's nothing wrong with it. You can't blip the throttle like that when they...
I just bought the same bike and this is my 4th 350. There's nothing wrong with it. You can't blip the throttle like that when they aren't warmed up. They are all like that when they are new. After the motor gets broken in, it goes away.
Do the more modern bikes have any kind of low-level machine learning like a car when you reset the battery? My STI would run so funky at the pedal until you drove it 3-5 times after a batter disconnect. I think you're completely right and I'm thinking it just needs a little ride time to behave better.
Moto520
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Moto520 2/22/2022 9:06am
2/22/2022 9:06am
That's normal imo.......
MXer391
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MXer391 2/22/2022 10:38am
2/22/2022 10:38am
Grouper wrote:
0.0 hours, I’m breaking it in today some and this is what’s going on. Blipping the throttle or rolling into about 1/16th throttle when idling in...
0.0 hours, I’m breaking it in today some and this is what’s going on. Blipping the throttle or rolling into about 1/16th throttle when idling in neutral causes it to make a “spitting” sound which I presume is a backfire and die. Check it out:

https://youtube.com/shorts/M4Blufa4o7k?feature=share

Any ideas? Does your Austrian 4 stroke behave this way?

Thanks everyone.
MXer391 wrote:
I just bought the same bike and this is my 4th 350. There's nothing wrong with it. You can't blip the throttle like that when they...
I just bought the same bike and this is my 4th 350. There's nothing wrong with it. You can't blip the throttle like that when they aren't warmed up. They are all like that when they are new. After the motor gets broken in, it goes away.
Grouper wrote:
Do the more modern bikes have any kind of low-level machine learning like a car when you reset the battery? My STI would run so funky...
Do the more modern bikes have any kind of low-level machine learning like a car when you reset the battery? My STI would run so funky at the pedal until you drove it 3-5 times after a batter disconnect. I think you're completely right and I'm thinking it just needs a little ride time to behave better.
Funny you say that. Yes, apparently they do. MXA has been recently saying that the Austrian bikes are to idle on the stand for 3-4 minutes to initialize the ECU before each ride. This is the first I have heard about it but I'm going to ask my riding buddy who is a certified KTM tech about it.
Moto520
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Moto520 2/22/2022 12:25pm
2/22/2022 12:25pm
MXer391 wrote:
I just bought the same bike and this is my 4th 350. There's nothing wrong with it. You can't blip the throttle like that when they...
I just bought the same bike and this is my 4th 350. There's nothing wrong with it. You can't blip the throttle like that when they aren't warmed up. They are all like that when they are new. After the motor gets broken in, it goes away.
Grouper wrote:
Do the more modern bikes have any kind of low-level machine learning like a car when you reset the battery? My STI would run so funky...
Do the more modern bikes have any kind of low-level machine learning like a car when you reset the battery? My STI would run so funky at the pedal until you drove it 3-5 times after a batter disconnect. I think you're completely right and I'm thinking it just needs a little ride time to behave better.
MXer391 wrote:
Funny you say that. Yes, apparently they do. MXA has been recently saying that the Austrian bikes are to idle on the stand for 3-4 minutes...
Funny you say that. Yes, apparently they do. MXA has been recently saying that the Austrian bikes are to idle on the stand for 3-4 minutes to initialize the ECU before each ride. This is the first I have heard about it but I'm going to ask my riding buddy who is a certified KTM tech about it.
i wouldn't let the machine idle on the stand for that long.......it will overheat
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sandman768
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sandman768 2/22/2022 2:14pm
2/22/2022 2:14pm
I let my 21 350sfx idle for about 2 mins, without touching the throttle if the weather is a lot different than the last time I rode, After reading the same article in MXA. These bikes do run better after about 10hrs,maybe due to break in? Every KTM I have owed runs cool compared to the Honda”s I had before, my bike just turned 110hrs on the meter, I routinely check the coolant level and never have had to add coolant. I think the cooling system is one component of why these engines last so long…
Grouper
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Grouper 2/22/2022 3:28pm
2/22/2022 3:28pm
A lot of interesting stuff here. Can any of you link the relative reading materials so I can pursue this on multiple avenues? Super neat honestly.
Chippy
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Chippy 2/22/2022 8:23pm
2/22/2022 8:23pm
My SXF (new 2021) did this last year. I got it delivered and it flamed out after running it, on the day I took delivery of it.

Turned the idle up, ran good fuel and it's been fine ever since.
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bvm111
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bvm111 2/24/2022 11:48pm
2/24/2022 11:48pm
My 21 does the same thing. order extra fuel filters and change them every five hours … even if there isn’t anything in them. 9 times out of ten it’s that damn little inline filter!

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