yz250f - Keefer, Inc. Tested

Twisted Development Airbox Mod (2024 Yamaha YZ250F)

Do you got a 2024 Yamaha YZ250F and used to own a 2023 Yamaha YZ250F? Do you miss a little bit of that 23’ low end punch out of your 24’ YZ250F? If so, there is hope and that hope lies with Jamie at Twisted Development and their Air Boot Kit. Let’s break down the…

ByKris KeeferDecember 31, 20230Comments

Bike Brands Hard Parts Performance Yamaha

2024 Yamaha YZ250F Optional ECU Maps

If you get your 2024 Yamaha YZ250F and it runs a little dirty/rich down low, have no fear, these maps should help this and help with manipulate the power a little. the Keefer Free Feeling Map 2.0 will get you less engine braking (maybe a little less torque), but pull stronger through mid-top end. The KK…

ByKris KeeferOctober 18, 20230Comments

Bike Brands Bolt-Ons Hard Parts Yamaha

Works Connection Offset Titanium Footpeg Mounts (Yamaha YZ250/450F)

If there is something I can’t stand on the 2022 and earlier Yamaha YZ250/450F's is the rider triangle. It is cramped, my legs feel high up when seated and the seat feels like I am sitting in a valley. I have tried several different offset pegs as well as tall seats and different spec bars.…

ByKris KeeferSeptember 21, 20220Comments

Bike Brands KiT Motocross Yamaha

2022 Yamaha YZ250F GYTR High Performance Engine Kit

There aren’t very many OEM manufacturer accessory divisions out there that offer actual engine mods for their machines. Oh wait, there isn’t one! The only manufacturer that offers anything engine related is Yamaha. KTM used to have KTM Factory Services but that has been shut down yet GYTR is still going strong with a long…

ByKris KeeferOctober 11, 20210Comments

Bolt-Ons Exhaust KiT Performance

DR.D Stainless Full Muffler System

By: Michael Allen And Kris Keefer It’s no secret that Doug Dubach knows Yamahas. That being said, after years of testing for Yamaha Doug started Dubach Racing Development where he builds finely tuned exhaust systems for other major motocross models. However, this isn’t one of those “other” motorcycles and we wanted to take that atrocious…

ByKris KeeferJanuary 14, 20210Comments

Bike Brands Bolt-Ons Exhaust KiT Performance Yamaha

FMF 4.1 RCT Stainless Muffler System For 2020 YZ250F

Written/Tested By: Michael Allen It’s no secret that the YZ250F is one of, if not the best 250F in the class for 2020. One of the things that makes the YZ stand out is the raw amount of torque it produces compared to the other bikes in the class. Some of the other bikes may…

ByMichael AllenDecember 16, 20190Comments

Bike Brands KiT Motocross Yamaha

2020 Yamaha YZ250F Baseline/Start Up Settings/Tips

The Yamaha YZ250F is un-changed for 2020 so this baseline set up article can be used for the 2019 YZ250F as well. The Yamaha is the easiest small bore four stroke motocross machine to ride with its torquey low end and improved top end pulling power that Yamaha came up with in 2019. For this…

ByKris KeeferSeptember 3, 20190Comments

Bike Brands KiT Motocross Yamaha

2020 Yamaha YZ250F On-Track Facts And Figures

Yamaha didn't change the YZ250F very much for 2020, but we did manage to get some added on-track information on Yamaha’s latest YZ250F and get you some feedback just in case you missed it in 2019. Below are some notes that should be taken into consideration about the changes Yamaha’s did make in 2019 and…

ByKris KeeferJuly 22, 20190Comments

Bike Brands KiT Motocross Yamaha

Living With The 2019 Yamaha YZ250F

After being in love with the previous model YZ 250F, I couldn’t wait to get my hands on the 2019. Once the initial introduction testing was over I got to spend some real time on the bike and have been struck by cupids’ arrow (once again). Almost every aspect of the 2019 YZ 250F has…

ByKris KeeferOctober 22, 20180Comments

Bike Brands KiT Motocross Yamaha

2019 Yamaha YZ250F Maps

Here are some maps for you to try on the 2019 Yamaha YZ250F. You can get these on the Yamaha website, but since I keep getting emails that say “I can’t find it”, now they’re right here for you to see! Enjoy! -KK

ByKris KeeferOctober 17, 20180Comments

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