How Much Power Can We Get From a 2023 Fuel Injected 125 2 Stroke? 

I too had a 2001 yz125 and the bike was an absolute ripper. Never should have sold it

Yamaha from like 97-04 is awesome

I had the first gen pds KTM 125, the 1998 model and rode with a bunch of buddies who had japanese machines including YZ's. None of them had a motor that would run with the KTM, they handled a little better but motor wise it was not close.

nice new bike dosent have a history of abuse and halfassed maintenances

You ever rip a ktm 200? Rips like a 300 with out the “oh fuck” qualities of a 300. And when modified they’re quicker off a dead stop than a 250 but lack the top end that gets scary on the trail. My forever bike

48hp out of a 150 is a stretch. I own/built a water brake dyno for my little engine work. Did you know there is no real good way to calibrate them? That is why you can take the same engine package to a different dyno, and get different numbers. If they got an actual 48hp out of it,---it was not running on gasoline. 48hp is pretty good for a 250cc bike on gas. I wonder how funny his exhaust smelled? :)

@@EarthSurferUSA probably smells like corn i would guess , haha

​@EarthSurferUSA nitromethane maybe?

I had a Husky Cr125 bored to an Eric Gore top end 144, and my 23 125 SX makes more power at every rpm. It's much easier to ride as well.

48 is realistic from a 150 , factory KTM 125’s where over 40hp decades ago and the road race 125 - 55hp !

The harsh truth is fuel injection will do nothing for horsepower. It makes tuning faster and easier, but you will get just as much power from a carburetor. Its main benifits are slightly less emissions, and that is irrelevant an a losed-course racing bike.

@@dr.hugog.hackenbush9443 its all about smoother throttle and smooth fuel delivery

@@lifebehindtheselens I had a throttle carbed 91 kdx200 comparable to that of a efi ktm all about tuning

@@dr.hugog.hackenbush9443 If anything it wil actually reduce power because of reduced fuel droplet size, I have a feeling the spray patterns on those are made extremely fine for emmissions

​@@lifebehindtheselens on a 125? 😂😂😂

its coming soon Brian :)

@@999lazer waiting to see a pro race a tricked one against 450s after seeing some ride em and confirm def 450 race competitive. Sucks AMA is stuck on politics but from what I hear you guys can run em with ?

I know he has the pipe already as we are shooting a test with it this week :)

@dpenduro8950 same as ktm. Same owners

Tech is properly applied, (and was developed), with free enterprise. The factories had no free market intention to push a bike to over 10 grand. That was the force from the EPA/government(s),---and that is called a dictatorship. It may eventually cost us,----everything we ever built. What we did not learn is school is the fact that free people, mostly in the USA, (the most free nation ever created by man), created free enterprise, and it is called economic fascism when government give out favors for their own political reasons, (hindering free market competition), and simply called communism when government tell us what to make and buy, and take over entire industries that free people built, (like our recently nationalized health care industry.). I say, with any rational definition, we live under a dictatorship now.

The fuel injection will comp fine with different elevations

exactly, in UK we are good with one jetting from March to November. No rapid elevation difference either.

​@@lifebehindtheselens there is no barometric sensor on these so no it will not comp for elevation

I think these new ktms are getting like 20-30 mpg anyway so fuel consumption sucks on these and there is not baro sensor to comp for elevation. I dont see any positives with this KTM really shot themselves in the foot going tbi on a 125sx lol. All the complexity and weight for absolutely nothing.. you can make the case for the 300 and maybe even the 250 but electric start and tbi on a 125 LMAO

In the test it was running 99 octane unleaded (pump fuel)

Who? What results?

Have you contact?

It is down on power. Tbi is a joke. Just ask anyone who bought it about the countless mapping issues and low hp numbers on a dyno

Yes to both! Efi does not equal adequate oil injection

They are 82hp from the factory with a huge carb.

www.motocrossdirect.co.uk and talk to Roland

I'm not exactly sure, I've seen people do this a lot... maybe for fun? Lol. Unless they are trying to keep oil fed into the cylinder while it's at high rpm's, since all the oil is in the fuel. Granted these bikes and many other 2 strokes besides those crappy 2 stroke cars made in the 1940s should be just fine engine braking without oil being fed. Maybe he just wants to add that extra bit of life to the bike haha.

12° dome

The edge of the piston is angled at 12 degrees but you need to buy the VHM head and insert to suit the piston dome pistons have flat top with a 12 degree edge some pistons are domed with a 12 degree edge

That will most likely be factory readings from the crank.

No. No it does not.

@@scootypuffjr. dyno tested it today 36hp to the wheel

@@bananas401k every dyno is different. Comparisons only work on the same dyno.

From a 1986 KX125? Id be interested in seeing the graph, as I have a 125 trail bike that has an engine very heavily based on the 86 KX, but de-tuned somewhat.

they are all part of the same company but the 2023 gasgas is not fuel injected

Yea, that is new business today. Instead of a company going out of business, KTM buys them up, (for example). But the competition is still gone. That is one thing I have not become sure of in economics, if merging is ethical. I know we have the right to do it, but if there was not any government force on the industry, new companies could start up with out being tax payer subsidized like electric bikes, (and never make a profit, so it is a drain of our opportunity.). I guess it depends if government force is ethical on our industries that free people built. What do you think? I think if it eliminates real competition with use of government force/regulations, it has to be unethical.

Which is a ktm150. Had pv work. Porting. Top end. Pipe etc. Was a shocking power figure!

@@TheShift1313 ya! Amazing bike

Yes while it was an insane number 45 hp isn't a fair figure to compare to this dyno every dyno is different so it's more important to know that dyno numbers. That cr150 is amazing and these 23 125s are amazing not fined tuned yet but can be amazing

If they can't figure that out, what makes anybody think they are qualified for this test?

It has been done and raced many times. But they need expensive race gas, so 44-47 is about the production limit today. Good porting matched with a good pipe with high compression on race fuel, and you are there.

Bone stock '02 & '03 KTM 250SX engine were putting out 50 hp while Japanese 250s were around 43-45 hp

That’s why the gasgas has the same motor, but is carbureted and faster!

Tbi is kinda a garbage idea for a 2 stroke. Just look at all the old 2 stoke GP bikes and the millions they poured into development. Most teams still used carbs. The successful ones anyway

Nah the 2024s are all fixes

Personally I prefer fuel injection tbh

Not really, when they are able to open up the computer and map it, these 2 strokes will be making more hp up top, and the fuel injected bike makes more power across the lower Rpms, so coming out of corners and such it’s going to be better than the carbed bikes once they start tuning them

If it was already running rich it should be all good now

nice!

Awesome bikes!

I’d guess more like 29-31 on a dyno

I think it is still true that a 2-stroke can make twice the power of a "4" stroke of equal displacement

@@EarthSurferUSA I don't believe that twice the power is possible as the 4 strokes still have cleaner scavenging. I'm pretty sure Yamaha's famous "1.6x" was pretty close to the actual difference in performance per given displacement.

Have you ever seen an engine dyno for dirt bikes? I would bet the factories made their own, but everybody else is using a roller/chassis dyno, because it is way more difficult to hook up different engines alone to a dyno. Even so, dynos have no real calibration that I have ever found for either type. That is why a different dyno will most likely post different numbers from the same engine set up. I bought a Land and Sea water brake dyno for my little engines, and built the drive system for a engine dyno. But I really had no idea if it was displaying the actual torque. But the stock engine does have hp/rpm in the owners manual (with no exhaust pipe/can, no exhaust at all and no air filter.), so I ran the stock engine, and adjust my "efficiency loss factor" in the software to match the 2.8hp at 12,500 rpm that the manual claims. It did peak power at the 12,500 rpm claim, so that was good to see from the Japanese built engine (Zenoah), now owned by Husky. That is the best for calibration I could do, (trust the engine manufacture). I have never seen a good way to calibrate a dyno, but some can be so simple, (direct drive inertia dyno's.), that if designed properly, will be accurate as soon as you put it together. I measured the same engine on a inertia dyno a old boss of mine made. The manual said 2.8hp. I got 2.78hp.

@EarthSurferUSA I didn't ask for a life story which I didn't read Was just a simple answer wheel or crank hp As rollers can work out crank hp

10 percent improvment aint bad 8) , at the racing level it all helps !

Dyno's are not calibrated, and will get different results. Plus, 33hp at the wheel of a 125 was slow about 30 years ago for a modified bike.

Dynos can only really be compared to themselves, unfortunately. And 3 hp sounds small but in percentage terms its a ten percent improvment which is pretty good for the kinda money they mentioned. As a an ex racer back in the day if you gave me one hp over every one else I would be a very happy bunny 8)

Someone might ask why you don’t say “one hundred and twenty five” you say the 25 in full, why not the 100?

@@Scissors69 the same reason you call a 250 a two fifty you wouldn't call a 500 a five zero zero

@@taylorhappe4212 and what would you call this reason? Preference perhaps?

The biggest problem with mx 2 strokes though is their usable power. Fuel injection should help that as more maps are developed, plus the default bonus of better fuel atomization. The other 2 stroke problem was lack of over-rev, which I'm not sure what the solution would be. 250f you can rev for very long without shifting, 2t you have to make sure you're in the perfect gear.

Nothing lasts here nor there... Why would pistins be any different?

There is no way

@Vaughan Hodgon want to some money on that.

@@vaughanhodgson check out the Dirt Rider dyno video. Of a 2022 KTM 250sxf..

@@dennismillus4581 ??? First of all this video is showing hp not torque and You can't compare 2 different dynos and u have to be foolish to think a 125 makes more torque. A 250f would make boat loads more torque throughout the rev range

@Vaughan Hodgon your wrong just wrong about the Torque numbers. Fact check yourself...

Hmm I like Husqvarnas more out the three.