Well, we finally got our hands on a new 2022 yz125 for some initial baseline dyno runs. The owner of the bike also has a previous generation yz134 we built for him which has become his favorite bike in the stable of 250f's, 350f, and 450f.  The owner is in his 60's and loves to ride with his sons - and has found the little bore 125 based machines to be the most fun and safest to keep riding year around.  

His comments on the 2022 yz were that it could use a little more bottom and pulling  power out of corners, but he felt the top end and over rev was fantastic.  He also stated both he and his sons felt the changed ergonomics made the bike handle much better than the previous year bike - I'd bet the stiffer suspension settings for 2022 helped in that role a bit (as the older model is quite soft by modern standards)

Lets get to the video - if you haven't seen it, it's attached below.
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 Now, Let's move on to some dyno charts.  We did a huge amount of testing - most of which isn't shown in the video.  But we found the bike is jetted a little rich most specifically on the pilot and needle.  The main jet is actually close for pump gas - but has room to go leaner for more power with race fuels.

The stock jetting we had on our USA spec bike was
75 pilot
160 main
2nd clip on stock needle NYDF

While I think there is more time we will spend on the jetting - we tested from 65-75 and found that it developed a lean bog around the 68 needle unless we had the air screw at 1/2 turn from all the way in.  

I've seen reports online of people going to more "normal pwk" settings with a 50-55 pilot and 175 ish main.  But we repeatable lost power going richer on the main - and found the low end running quality deteriorated dramatically below a 65 pilot.  Jets add to each other, meaning if you went to a 50 pilot and a 175 main - it wouldn't be as rich as a 75 and 175 - the pilot wont contribute as much fuel at a 50.   Something to keep in mind is the is a powerjet carb - which adds fuel to the main jet circuit.  If the powerjet were plugged, the main would need to go to around a 185-190 to run right.  I highly suggest you keep the powerjet system - it improves midrange power without hurting over rev.

One of the best mods we have found for the KTM 85 platform, whether it's an 85 or  a 105 or 112 supermini, is a bored and modified carburetor.   This mod is also effective on all other brands - from kx85 to yz85 and rm85, as well as gas gas 85 and husky 85.  Check out our video of the mod process, as well as the dyno charts of what results we got.  To be fair, this was all stock vs bored and jetted right, a stock carb jetted a little differently would have been closer but we typically see nice gains in the 1hp range.

Let's take a look at just how much power a stock KTM 85, husky 85, and gas gas 85 really makes.  I've tested almost 20 fresh or new stock bikes in the past year, and they are all really similar (as they should be).   Some are better than others, and in this instance we have decided to publish about the best case scenario we see on a new stock 85. 

Check out our youtube if you haven't and see below for more charts!

Below is a chart of 4 back to back dyno pulls.  As you can see there is a power variation between a few.  This is why dyno testing procedures must be understood - and consistent for repeatable testing results.  What you will see is that in the case of the current stock 85, it really likes to have some pipe temperature and power improves when hot.  On many stock bikes, power gets worse with temp, or shifts to the right with less bottom and mid and more top/over rev. 

I've got a little bit of extra information for you as well. Below is the result we got when swapping to an FMF fatty from the stock pipe
As you can see, we got a small but measurable and repeatable improvement in power.  I've seen upwards of 2 hp sometimes from stock to aftermarket on these bikes, but not on this one.  We will publish a complete pipe showdown shortly so check back soon!

What does the KTM 350 actually make on the dyno?  Let's check it out!
If you haven't seen our youtube video please watch!  
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And if you did, well here are some charts for your viewing pleasure. So of note - even though a 450 makes it's power much earlier in the rpm range, the average power over the rpm range of a gear change isn't much better between the  350 and 450. Additionally - the extra RPM range of the 350 allows it to be geared shorter/tighter.  This tighter gearing plays a huge role in fast a bike accelerates.  

While the 350 isn't for everyone - it makes plenty of power to be able to compete heads up vs a 450 in our opinion.
We will publish vs some other 450's soon!

First up is map 1 vs map 2. Quite a big difference on the 350.  

Next up is our GET ECU and tune up vs Map1 OEM.  We made nice gains vs both map 1 and 2, with the added ability to have custom maps for fuels, pipes, and mods.  

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How does the 2022 KTM, GasGas, and Husky 85cc run on the dyno?  I've got that and more coming at you hot in this article

We took a brand new, never ridden 2022 husky 85 through its paces and got some great baseline data to publish.  We also did an fmf vs stock pipe test, and later on check back for some inside secrets on our mod bike builds.
Let's get right to it!

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First up is 4 back to back dyno pulls.   To note, the first run is the worst power - because nothing is properly up to temp within the pipe.  When a bike makes its best power on early pulls and falls off, it's usually a sign the pipe is a hair short (or jetting to lean) for the combo.
In the case of the ktm 85's - they really like lots of pipe temperature.


If you haven't seen our youtube video on it, please check it out and watch!  Means a lot to the shop so we can publish this stufff!

Next up, is an fmf pipe comparison vs stock.  Both runs shown are the 4th of the 4 back to back pulls for each pipe.  As you can see, the fmf made nice gains all the way up the curve.  Power down below 7000 isn't consistently tested run to run - as I roll into the throttle etc.  Frankly, kids don't ride below 10000 hardly ever..

We've got a lot more testing coming up soon!