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I've heard quite a bit about the 350 flame out problems and yesterday was my first experience with it. Racing a Hare scramble and had at least 5 flame outs in a 2 hour race. I have a Rekluse auto clutch so it shouldn't happen at all but it did. because it has a Rekluse, just turning up the idle may not be a good fix because it could creep. Does anyone have any fixes for it.
First thing to check is your inline fuel filter. Especially if it just started happening.
Thanks, I'll give that a look, still a fairly new to me bike and the course I was riding on was a little harder than concrete. It happened while coming down from speed and locking the brakes up. Other than riding at the Fly ride day at Pax last weekend this was my first time with the Rekluse.
I am not familiar with these bikes but do they have different mapping? Like a switch or plug?
I’m on my 3rd 350. Turn up the idle a little bit and it’ll mostly fix the problem. Eventually, get a Vortex and you’ll not only fix the problem, but turn your bike into an absolute trail weapon.
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Could you please describe the flame out in more detail. I clicked on this post expecting to see something like this
The fuel filter is more likely to cause higher RPM stutter since fuel demand is higher. A throttle position sensor adjustment will make it a little richer might help flameout.
That's a flame on.
the fuel filter was already on my list because I was experiencing some high RPM issues.
Run the heavy wedges and light springs on the rekluse. I was about to throw the rekluse in the trash until I tried this combo on my 350
stock mapping on these bikes are terrible. Mine does the same shit and it drives me nuts.....it needs a remap and make sure the TPS is adjusted as well.
Fixed mine by adjusting the TPS.
so it takes a vortex to fix the problem? and people still buy these things?
My 2021 has been flawless.
Changed inline fuel filter every other oil change.
Yeah....super expensive bike...holds up great though....
change the inline fuel filter every 5 hours … it’s cheap insurance.
The 350 XCF and SXF will flame out when the terrain gets technical. In wide open off-road or at the track its not a issue. Couple things you can do, higher idle and you can adjust the Rekluse for a higher stall speed but a flywheel weight really helps also. I have had some guys also let Tokyo Mods, Blaise Racing or Twisted Development do remaps and were pretty happy with the results. Also trying not to lug the bike as much, its tempting because it pulls so well down low but that's where it will flame out in you.
I have the Taco Moto TPS tool and have used it on the last 5 KTM's I have bought and every one of them has been set too lean from the factory. When the TPS is set right it fixes all the flame out's and poping also if you switch to the filter cage without the screen you definitely need to reset the TPS.
I am not saying the mapping is perfect, but if you are going down a hill with a rekluse and you lock the back brake, then the clutch settings are the issue, surely??
Because if you didn't have rekluse and had perfect mapping, locking the back wheel with bike in gear will cause a stall??? Right?
Pit Row
132 hours on mine. No issues.
Wait til you see what it cost to fix the suspension
Can you please elaborate? My bike stalls if I go WOT from idle. I've never heard of this being alleviated with the TPS. Very interested in fixing it if this is the route.
The throttle body TPS should be set to .40 volts with the throttle cable backed all the way off and the idle and the choke backed off too. The bikes I have had the past few years have been coming set around the low .39 and as low as .38 which is a lean setting, My 2023 KTM 450 seems to like .41 volts since I am running the filter cage with no screen.
I have 223hrs between 2 350s and haven't experienced that, but my idle has always been set to 2250-2350 per the manual. Bought an rpm tach that clips onto the sparkplug wire specifically for that. Also heard if your cold start dial is way out of adjustment it can mess with the throttle body. Sounds like it's something to do with your mods
The clutch is likely dragging ever so slightly causing the engine to be killed when you abruptly lock up the rear wheel with the clutch lever out. It needs some adjustment.
My cold start knob was approximately 15 clicks too far in causing a rich condition and the bike ran like doo doo. I wasn't understanding all the 350 love until I found the issue and corrected it. Neither the OEM or dealer thought to check it.
I've been dealing with stupid issue on every machine I've bought post covid.
Awesome, how do you adjust it?
https://www.youtube.com/watch?v=f_FZ2tBDjTY&t=665s&ab_channel=TPSTool
Awesome! Thank you!
I had gnarly flame out on my 350 after adding exhaust, 2 stroke cage and vented airbox. Adjusted the tps, changed spark plug and bike now eats
Can you track the throttle open without it stalling?
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