Jetting for Yamaha YZ 2T bikes App Reviews

This app is helpful, I currently use the yz250 setup, but wish they would update with the YZ250X. This is why it's getting ***

Love the app, but would like to see big bore kit jetting on the app. Hope it's a update soon.

Looks nice and recommended setting seem to align with other information I've seen online for tuning older YZ250s. But only covers up to 2015 model year and limited to 10,000 ft elevation, and doesn't cover YZ250X. I ride a 2016 YZ250X, and often go over 11000 ft. The base settings the app comes up with don't match what my manual says, so I'm not comfortable using the app's recommendations for altitude adjustments.

I tried this setup and it worked great! Some may say that it doesn't work because the bike won't idle, but they don't understand that this is how bikes are race tuned - it is to help the bike slow down faster with engine braking. If you have a doubt, adjust it first and grab the throttle halfway - it will lift the front end well before it hits the powerband. I went to sand mountain (Utah - 700 ft high dune) and the bike was still grabbing more power as I was flying up the dune in 3rd gear 1/2 t

Great app to dial in mine and my kids bikes as they are different sizes. Also riding year round and at different altitudes makes rejetting a breeze. Bikes run great and are responsive like they should be and I expect.

Hi, like the idea of this app and want to use it, but the specs on the app are incorrect for the 2019 (2020 is the same as 2019) YZ85. In 2019 Yamaha redesigned the YZ85. Can you please update the app or refund my money?  Here are the correct stock specs, please verify though. YAMAHA YZ85 JETTING FOR THE KEIHIN PWK 28mm Here are MXA’s recommended jetting specs (when changed, stock specs are in parentheses): Main: 145 Slow jet: 45 Needle: NBKF Clip: 4th from top Air screw: 1-1/2 turns

My YZ125 was too rich with stock jetting. After set up the carb with this app, the mileage has increased and the engine runs like a dream

My bike runs very well with the setup given by this app. Oil mix ratio adjustment is fine too

After playing around with the fine tuning I can re-jet with local weather data and the bike runs like a champ .

Come on man we’re riding 2023 bikes and this app is still back at 2021 please up out an update already

I use this app for all my two strokes. I live in Reno Nevada and ride Nor Cal MX tracks often. The jetting recommendations is always spot on for me. More riding and less jet changes. 😎

But the pilot jet recommendations are far off, ie 5000 to 10,000 asl only recommends a turn out on a/s when I’ve found 2 sizes down on pilot is necessary, seems to recommend rich settings here. It’s difficult to input elevation with the keyboard being in the way.