Feedback on New Fuel-Injected KTM Two-Strokes?

FGR01
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6032
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10/1/2006
Location
AZ US
Fantasy
3/10/2026 5:27am
You didn’t strike a nerve, TBI Ktm’s did. I’ve never seen a TBI thread without fgro1 chiming in about how terrible they are, don’t take it...

You didn’t strike a nerve, TBI Ktm’s did. I’ve never seen a TBI thread without fgro1 chiming in about how terrible they are, don’t take it personal.

I noticed earlier in this thread you shared your positive thoughts on TBI's but left out the issues you had with them.  You should share those pics again.

3
AMetts
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Lincolnton, NC US
3/10/2026 5:30am
FGR01 wrote:
I wish you the best of luck with it.  But do promise us that you will come back here and let us know if it has...

I wish you the best of luck with it.  But do promise us that you will come back here and let us know if it has some massive headache of a problem like so many other TBI bikes have.

826 wrote:
My experience has been these massive headaches problems are more common online than in real life.I have a '25 250xc with 80ish hours and it hasn't...

My experience has been these massive headaches problems are more common online than in real life.

I have a '25 250xc with 80ish hours and it hasn't had a single hiccup.  My best buddy and his kid both have '24s, one with 200+ hours one with 100+ hours, no issues.

In my riding group I've been around at least 20 other TBI bikes since they came out and I don't know anyone who has had these gremlins that the internet loves to talk about.  Mostly off road riders/racers so a lot higher hours than dudes who sit at tracks half the day waiting to ride.  

Seen several of them go 150+ hours without opening the motor at all.

I guess we're all just lucky.

Pretty much my experience too, have 80 hours on my 24 300XC and my wife just bought a 24 250 and we have had no issues what so ever. We race GPs and hare scrambles and I see a ton of these bikes out there every weekend and have seen none sitting on the side of the track. 

The only modification I have done as far as tuning goes is cut half a coil off of the red idle adjuster as mine was almost bottomed out and still wasn't quite a high enough idle. 

2
bodycast
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1/18/2020
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Monroe, NC US
3/10/2026 6:04am

I have a good buddy that I ride with that fouled a plug on his yz few rides back.  Left us on the side of the trail for about an hour and a half.    Bike had about 10 hours on it.  

Does this mean he should light it on fire and tell everyone the bike is a peice and in no way shape or form did he have anything to do with that plug fouling?

3
bodycast
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Monroe, NC US
3/10/2026 6:10am Edited Date/Time 3/10/2026 6:10am

Another friend dropped a valve in his crf at about 45 hours.  

Another crf blew out the rear spokes landing off a triple.

Another friends oil pump failed on his yzf and sent shit flying all in the top end.

I had a oil pump gear fail on an xcf that caused some damage in the top end.

What are we doing here?

 

2
1

The Shop

G-man
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Mesa, AZ US
3/10/2026 10:14am

Wow, you guys are giving me the willies with all this talk of problems with the TBI Bikes. I just picked this up a few weeks ago with thirteen hours. The only thing i've noticed is some spooge on the silencer, other than that it ran great.

Granted, it still had some gas in there from the previous owner, who bought it from someone else.So i'm not sure how old the gas is, but I put some fresh premix in the tank to mix with the old gas.

So far so good, the bike is very nimble, but actually felt a lot like my 16 350 XCF W that I've loved as well. 1000013287 1

3
dcg141
Posts
2310
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11/30/2009
Location
MS US
3/10/2026 10:33am

The best mod we have seen from customer feedback on all the two strokes are RK-Tek heads. 

2
3/10/2026 11:25am

I have a friend who has a ‘24 300SX he’s had since new. I think they had some bugs to be worked out with reflashes the first few months, but since then he’s had nothing bad to say. He’s scored some top 10s at LL a few years ago in 125 B/C and Schoolboy, he’s no slouch and the bike lives on the limiter, 90% of his riding is deep FL sand. He did a top end around 80 hours and now it’s just under 140 hrs and runs flawlessly. 

Personally, I just prefer a carbureted bike for the simplicity. It’s the same reason I like manual windows and locks in my truck. Less is more to me, I’m not going to dive into semantics about peak HP because none of that really matters. I just like being able to work on my shit easily when and if I need to.


Personally, I find jetting kind of fun. It’s nice to take some unridable, blubbery POS and turn it into a crisp and responsive engine. It’s not very hard to do and only costs a few bucks in brass. 

I also prefer a carb’d two stroke because of the engine characteristics alone. I ride my bikes to enjoy them, not chase lap times. Nothing puts a smile on my face like when my PC built 125 hits it stride and just never shuts off. When I rode a TBI TC125, within the first two laps I just knew it wasn’t for me because of the “4 stroke” like feeling. It just didn’t tickle my pants like an old carbureted bike does. 

There’s a seat for every ass. 

9
urbanlift707
Posts
1138
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9/27/2006
Location
Humboldt, CA US
3/10/2026 10:49pm
You didn’t strike a nerve, TBI Ktm’s did. I’ve never seen a TBI thread without fgro1 chiming in about how terrible they are, don’t take it...

You didn’t strike a nerve, TBI Ktm’s did. I’ve never seen a TBI thread without fgro1 chiming in about how terrible they are, don’t take it personal.

FGR01 wrote:
I noticed earlier in this thread you shared your positive thoughts on TBI's but left out the issues you had with them.  You should share those...

I noticed earlier in this thread you shared your positive thoughts on TBI's but left out the issues you had with them.  You should share those pics again.

My pics of a blown up motor were from my 2020 husky 250. I never had a motor issue with a TBI bike. I did have issues with my early model 23 having a bog that a map fixed. Guess what my yz250 misses shifts and vibrates like hell, my 24 yz450 lost a Front brake at 20 hours. No reason for me to jump into every forum to bash them. Shit happens.  

4
urbanlift707
Posts
1138
Joined
9/27/2006
Location
Humboldt, CA US
3/10/2026 10:53pm

The 2020 tc250 was a gnarly motor failure though! 15 or so hours I recall and husky covered the entire thing!IMG 1767 6IMG 1771 1IMG 1759 3IMG 1760 3.jpeg?VersionId=4.urJ5qU1vNCqUOcsaejD

1
urbanlift707
Posts
1138
Joined
9/27/2006
Location
Humboldt, CA US
3/10/2026 10:55pm
You didn’t strike a nerve, TBI Ktm’s did. I’ve never seen a TBI thread without fgro1 chiming in about how terrible they are, don’t take it...

You didn’t strike a nerve, TBI Ktm’s did. I’ve never seen a TBI thread without fgro1 chiming in about how terrible they are, don’t take it personal.

FGR01 wrote:
I noticed earlier in this thread you shared your positive thoughts on TBI's but left out the issues you had with them.  You should share those...

I noticed earlier in this thread you shared your positive thoughts on TBI's but left out the issues you had with them.  You should share those pics again.

My pics of a blown up motor were from my 2020 husky 250. I never had a motor issue with a TBI bike. I did have...

My pics of a blown up motor were from my 2020 husky 250. I never had a motor issue with a TBI bike. I did have issues with my early model 23 having a bog that a map fixed. Guess what my yz250 misses shifts and vibrates like hell, my 24 yz450 lost a Front brake at 20 hours. No reason for me to jump into every forum to bash them. Shit happens.  

Edit, I just remembered, I did blow a top end on my 24 from detonation. But I think that was the twisted map, their green map was lean as hell and apparently (they later told me) not to run that in deep sand. Again, I stand by my belief that the tbi 300’s are the best two strokes ever made!

4

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