KTM EXC TPI 2018 Models - Running Lean [Problem]

[@stanleygardiner1780]

Mines now done 14hrs and Its running fine I'd get the dealer to check the throttle sensors Keep us posted

[@ChangeCorpGroup]

This is the Rev limiter. The TPI comes with a Rev limiter because it doesn't have the natural fall-off that a carb does at max revs

[@RWWRENTAL]

I dont think TPI come with rev limiters. My bike is doing the same thing and every once in a while, it has a smooth response with no pinging.

[@blancolirio]

Seems to run fine under a load...In neutral you are just hitting the rev limiter. (Great wheelies btw).

[@theslipperface]

There is no rev limiter...

[@laurenz5187]

@@theslipperface yes there is its a tpi

[@a64738]

Cold start on TPI bikes it is very different as they only get pure oil injected into the crank and it takes time for oil to get to the piston specially in cold climate areas (like here where summer is +5C to +10C) and when doing winter riding. There is many videos here of pistons of TPI show wear marks probably caused by lack of lubrication on the piston during cold start. KTM should maybe make another cold start oil injector to lubricate the piston when starting. .......

[@hardenduromontoncel1078]

The problem seems be only when you are in neutral, it doesn't appear when you ride full gaz in the field no ?

[@Lewiseyers]

Pmsl...its fine when riding, which the bikes designed for.... Sitting stationary revving the cock of it, it sounds as you'd expect from a engine of the state of tune...lol... Some people crack me up

Have you replaced the fuel screen (the fine filter on the fuel line) to new one yet? The user manual suggests to replace one after only one hour of riding at the beginning and then after every 20 hours or so. I didn't replace mine yet, will wait for symptoms of clogged filter and replace then.

[@DiDoSvK]

"And due to the nature of FI and its ability to allow the engine to spin to ridiculous RPM without falling off like a carbureted motor, KTM had to place a rev limiter inside the ignition so riders didn’t blow the bike up with excessive RPM. So often times on a wide-open upshift you can hear a loud pop from the exhaust that some assumed was due to a lean condition which isn’t the case." Read more at dirtbiketest.com/fresh-dirt/2018-ktm-250300-excxc-w-tpi-riding-impression/#iS621muJ5ve2PgVz.99

[@rihs335]

Hi you fix this or its not the problem ? mine exc 300 212 do fuly the same thing

[@a64738]

It is supposed to run lean when not under load after what I have heard?... You need to test it while under load to know if it is actually running lean (look at videos on how to use spark plug color to find that out). The electronic fuel injection system adjust the mixture different if it is under load, what rpm and all kinds of other factors. My brand new 2019 mod KTM 500 EXC F is running so lean that top speed is 95km/h... Something is wrong with it and dealership of course have closed for summer holliday a week and it is 5 hours drive to get there lol (my kind of luck).

[@jjoeabhn2526]

Rondo Cat im not sure but if its a brand new bike it could have speed limiter for the first few hours

[@THEBOILEDONE]

My cr 250 does the same thing...was it a lean pilot.you can tell your bike is lean by how the revs hang when you chop the throttle.these idiots saying it's a rev limiter obviously didn't listen to it rev higher...wtf.

[@Dovestar295]

My tpi does the same so what’s the issue with the bike?!

[@mitsu554]

Its not a rev limiter?

[@EdVenture547]

KTM's fix is to remap the ECU.

[@rihs335]

I hawe been Yamaha yz 125 2006 carburator and my engine runs the same whet open trodele 50% its wierd rpms jumping. when is on idle works perdect but when go full trodle runs perfext to wierd thing for 2 stroke

[@csulea0590]

How do you solved IT?

[@mobbniggazz]

i think its coolant sensor issue because of bubbles inside the coolant system

[@sptnk87]

I think that the TPI has a rev limiter, thats why it sounds like that.

[@TheDirtbikeRiderNoMusic]

KTM TPI EXC 2018 models are running very good in low revs at the bottom end, but on top end the bike is running lean, maybe that is ok but its weird. So EXC250 TPI is using a lean mixture of gas and air.

[@maverick2242]

The Dirtbike Rider #2 No Music you have 5 different sensors with the TPI bike, if not the fuel filer as suggested above, I'd be getting those sensors checked out! Especially the throttle position sensor, as where that is will determine your fuel oil mixture at varying revs and this is what you describe, where as the fuel filter dirty from bad fuel or not being changed regularly to me would affect all rev ranges esp low, yet you don't say low is affected! My 2c ftw!

[@rtk4214]

kzbin.info/www/bejne/g3nPdoeFnMd0jsk The KTM Husky channel has a fix.

[@motoarizona779]

KTMandHusky.com will have your answers

[@RhinoStar0]

Have you adjusted the powervalve? I queried KTM why I didnt receive power valve springs with my bike, they said you shouldnt change it on TPI bikes as it will confuse the injection system, go figure.

[@mattiasandersson3444]

Sounds like BS to me. Should KTM´s techicians have missed that ? Dont Think soo, its not he first time they construct a dirtbike

[@RhinoStar0]

Mattias Andersson copy and paste of email from my dealer - " Further comms from KTM re missing part & power valve springs :- There are no optional power valve springs with the 2018 TPI bikes and we have been informed by the factory it is not recommended to change them for previous models springs as it effects the running due to the more detailed ecu calibration. I have raised the website issue with the factory and asked this is removed. " Nuf said

[@hobidolap]

did this problem start after the crash?...

[@TheDirtbikeRiderNoMusic]

nope, it comes with new bike !

[@sebysebastian7578]

I know that the vforce readings are sometimes bad to it... check that out

[@ke8amr536]

That's the rev limiter. On a fuel injected bike it's an ignition and fuel cut.

[@RWWRENTAL]

that is def not the rev limiter. if you check the 1:00 mark its pinging at mid range then he revs it even more in the high revs and its worse up there. if it was the rev limiter, he would not have been able to put it even more into the revs. im having the same issue except mine does not do it all the time. I dont have a rev limiter on my TPI it just keeps revving until it cant anymore

[@DenisElpashev]

And how are you supposed to adjust the mixture on those tpi bikes? Only to go to a dealer and ask them to do it?

[@blazbencic5453]

Денис Елпашев I think that the TPI system is not a thing you should mess with, because theres alot of sensors and shit

[@DenisElpashev]

yes, and that is a big problem. With good old carb I can do whatever I want, I can adjust it precisely the way I like it, but with this fancy pantsy tpi crap if something goes wrong (and it will always do, sooner or later) you're clueless how to fix it...

[@jeffmc686]

Don’t be afraid of technology, have fun with it. Remember the “good old carby” was once new. Just the rev limiter in this situation. Normal.

[@danielhiltunen5294]

Pinging bad. I'll stick to carby

[@markkus1134]

Should have got the carbed model

[@enduro-parts-aus]

defiantly doesnt sound good, thats why id rather my 300 with a lectron carby rather then tpi

[@MrJasonfromcanada]

ive had good luck with JD needles on my 300

[@mattiasandersson3444]

I Think it´s a typical 2 stroke-thing, the on and off problem. Same thing going on a road, it cant hold the same speed though you dont move the throttle. Same thing here, without load on the Engine. Just my 2 cents.

[@anibaltv845]

Rev limiter, you should read the manual of the bike, looks like you don’t know about it very much, or the tpi at least

[@fallbangskid5037]

I just got one.... Is he hitting the rev limiter? She sounded like that or a EFI fuel cut back to prevent over rev....

[@drax6821]

No, it's not running lean. Read the manual before posting false information. It's the rev limiter.