Yamaha YZ125 Jetting + 30 Pro Setup Tips & Discount Codes to Save Money & Go Fast! 

Great video that many of us have been looking for, thank you!

Good video guys, very helpful tips for seasoned riders and especially new ones, great job!! Sure, wish we had these bikes when I was young. Dale

Awesome video with loads of great content and information 💪🏻👍🏻🇬🇧

This awesome! I struggle with the front axle on the TM and I think they are binding since last tire change. Sorry again about the confusion at the check yesterday. Great see you guys!

All joking aside I know Mike and he has always took time out to help out other riders from new to older and he has been around the track more then once He has helped me out more then once Thanks for all the help and tips...

Great video guys!

I also recommend trying the STIC Super X 38/40 carb. It provides substantial low end grunt, but it also adds a few HP 1300 RPM before stock peak HP and a couple HP 750 RPM after the peak. 3rd gear inclines at 1700 RPM and the throttle can be ham fisted without any clutching. No loss in power going 2 teeth off the rear sprocket and going to a taller tire! Small bore magic.

Finally, I have been waiting for this video!

I am way slower than your kid, so my jetting is a bit different. I found the midrange to very rich on my 24' YZ125X, so I bought and measured a few different needles. The Suzuki NExx series of needles is leaner at 1/2-3/4 throttle, so I use a NECW needle with a 52 pilot and 172 main. I do a lot of trail riding with the gf, and this jetting is a happy middle ground for my c/slow b class race pace and trail riding with her. Great video with lot's of info. Thanks for putting in the time.

It would be nice if you could measure diameter and taper starting position of jdkit needles

Great video.....We wanna know about the Y4 needle!!! ;)

Nice, video with some great setup tips for the Yamaha's. FWIW, I spent a bunch of time jetting a friend's 23' YZ125 last year. The biggest problem with the Keihin carb on that bike, is the slide. They are trying to share the carb with the 250, but the slide is just too lean to be effectively used in the 125. Once you put in a richer slide, I was going back and forth between a 5.5 and a 6.0 slide, Ideally, I would just cut a 5.5 into a 5.75 and be done with it. It really opens up your jetting options. On another note, Those bikes are very sensitive to altitude, so you're looking at dropping the main jet probably 2 sizes for Snowshoe (as your jetting stands now) The pilot and needle should be good though.

Thanks for the tips. Are the DT1 air filters available for Beta’s? I looked on there website and can’t tell

The one radiator cover product looks like the fiber mesh used by stucco installers as a reinforcement. Not sure what they call it. I use the gutter-guard plastic mesh. Important to leave some pouching of the material during install so the material can flex which helps shake off mud and grass. I also leave a small bit of it loose at the bottom for the same reasons.

Man that's some good info on this video!! Sold me on a few of these products!! Looks like the mika and dt air filters codes are expired just fyi

If, after getting the factory keihin dialed in and you find your chasing more power out of your 125, I recommend a Stic Super X carb by Stic Super Torque. On my 23 yz125x, the impressive broad and wide power gains from bottom to top from the X carb alone was more noticeable and eye opening than my other bolt on mods; cylinder head,cdi, pipe. Some riders that I offered test rides to say, is it a 150? With the X carb at 1/4 throttle, it's almost as powerful as my factory dialed in keihin was at full throttle! The new Stic Super X carb provides a significantly wider power curve and power increase compared to the Stic metering block insert. This is mainly due to an additional air correction jet in the intake bellow area; additional passages in the jet block, and tube to create pressurisation and presure drops at the entry, middle, and exit area of the jet tube. This creates a shearing action within the jet tube itself to create superior fuel atomisation. The pilot circuit is sealed off from the float bowl! Below intermediate engine speeds it function as a normal pilot jet. However, from intermediate engine speeds and above, it reverses flow and feeds the main jet extra fuel vapour and air, creating an endless top end pull with fantasic over rev characteristics. The Super X is at home on an MX track or slow technical single track. Due to the fantasic fuel atomisation and various sensing passages in the jet block it is very stable with temp or elevation swings with only a tweak of the airscrew ever needed.

Any issues using the Cycra handguards with the Mika Metals handlebars? I was looking get a new set of Cycra CRM probend guards and Mika oversize bars.

oh boy there's a brand new 250 thumper sitting in the driveway!!! I'm betting you will like it for 1-2 races and then the 2 stroke will come back out of the truck

The Boyesen reeds and Apex head did heaps for my yz125 been looking at a vortex or GET cdi have you guys took the time to check either out or plan to buy one or keeping the cdi stock?

what is the tape you use on the levers? Is it tacky?

Can you post a link for the Chain Guide reinforcement?

Where is the option to add and send tips?

Got the y4 needle coming this week. Pro circuit called me yesterday and finally got them in. The carb in my son’s 23 came with the mid block gasket leaking air and no oring on the air screw 🤦‍♂️. It was leaking air everywhere. I tried the jd kit but was way to lean for me it was just bogging to death off the bottom. Could have been the air leaks but jd was no help and said I was doing something wrong so I sent it back. I will be trying the y4 with pro circuits jetting specs once the needle comes.

The Alco discount code is invalid. Do you have an updated code?

Not gonna watch this because I don’t have a 125 but I will make my dad😂

what abt an 85

How to make your yz125 a better bike Buy a YZ250 lol

Great video guys!!!