MXA TEST UPDATE: 2023 GASGAS MC125 TWO-STROKE

On Apr 20, 2023 Last updated Apr 20, 2023

HOW’S THE ’23 GASGAS MC125 ENGINE? The 2023 GasGas MC125 is a carbon copy of the 2022 and 2021 models, which were built off the 2021 KTM 125SX with softer suspension, forged aluminum triple clamps, Maxxis tires and a closed-off airbox cover. With that being said, this engine is good, really good. The powerplant uses a spring-loaded power valve and a Mikuni TMX38 carburetor to meter out power at a rapid pace. Yes, the airbox is closed off, which hinders initial throttle response, but it’s easy to drill holes in the plastic and let the “red KTM” breathe.

HOW FAST IS THE ’23 GASGAS ENGINE ON THE DYNO? The GasGas MC125 is unchanged for 2023, yet it jumped up to become the fastest 125 in the class. How so? KTM and Husqvarna introduced new, fuel-injected engines that are more “technologically advanced” but are actually slower than before. KTM took one step backward, as they were attempting to take two steps forward. Next year, the 2024 GasGas MC125 will follow suit with the same chassis and engine as its white and orange siblings, so the difference won’t matter. But, for now, the tried-and-true GasGas MC125 is strongerr by 1 full horsepower on the dyno. The MC125 hits a peak of 38.25 horsepower at 11,400 rpm, and it has 17.87 pound-feet of torque at 11,200 rpm.

COULD THE ’23 ENGINE BE BETTER? The GasGas MC125 engine is technically the best engine in the class for skilled 125 riders, but it’s not the best for Novices. The fuel-injected KTM/Husky 125s actually works really well for less experienced riders because of their friendly power character off the crack of the throttle. Of course, they could be better, but the GasGas MC125 has a strong midrange and impressive top-end pull that intermediates and Pros thrive with.

HOW GOOD ARE THE MC125 FORKS? These WP XACT air forks mimic the KTM 125SX fork components, only they are valved to be significantly softer. They work great for riders who like plush forks and don’t mind having less hold-up.WHAT ABOUT THE REAR SUSPENSION? The rear suspension is also very plush and great for the target 125 rider who is young and transitioning from minibikes to big bikes, or for the lightweight adult who’s enjoying a 125 two-stroke. But, if you’re heavy or fast, you’ll need to go up a spring rate and go stiffer on valving.

HOW DOES IT HANDLE? It’s funny, in our “125 Shootout” we talked about the GasGas 125 having the best engine for skilled riders, but the KTM 125 has the best suspension for a skilled racer. It’s a little mix and match. The GasGas’ forged-aluminum triple clamps also create more flex in the front end when compared to the CNC-machined clamps on KTMs and Huskys. Overall, the soft suspension valving and the forged aluminum triple clamps make the GasGas handle perfectly for Vets, Novices and lightweight riders, but it’s on the soft side for faster 125 riders.

WHAT DID WE HATE? There’s not much to hate about this bike, but if we could gripe about one thing, the airbox cover is unnecessarily closed off. It’s similar to the KTM 125SX air box cover from a year ago, but where the KTM cover had a slot for the engine to breathe through, the GasGas has a plastic lip meant to suppress adequate airflow. It would be nice if GasGas gave you a vented cover with the bike. We replace the stock cover with a vented UFO cover.

WHAT DID WE LIKE? (1) The engine is tried and true. We know this powerplant like the back of our hands. It runs clean, it runs strong, and it revs to the moon. (2) The chromoly steel frame of the GasGas MC125 is comfortable and flexible. Once the suspension is set for your speed and weight, the chassis does no wrong. (3) Aesthetically, the GasGas MC125 is beautiful. From the compact two-stroke engine to the cherry red chromoly frame to the silver rims, triple clamps and handlebars to the sharp red and white plastics, this bike is a looker. (4) The MC125 weighs 194 pounds—that is light!

WHAT DO WE REALLY THINK? The GasGas 125s are selling like hotcakes, and for good reason. They are proven to work, while the new-age KTM and Husky 125s have kinks that need to be ironed out. Our test riders love the GasGas MC125, and it’s hard to get them off of it. It’s light, fast and fun. What’s not to like?