Dirt & Trail SEPTEMBER 2022

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Kyle:- “On the four stroke side what are some of the big changes?” Grant:- “Pretty much everything. It’s a brand new motorcycle from front to back, the only parts it shares from last year’s models are the fuel cap and the front wheel. New frame and new swingarm, paired together with a new linkage which gives the bike a much better geometry for the suspension which gives the rider a better forward position giving him/her a better rider triangle. As far as the rest of the bike goes, the engines are completely new on the four strokes and two strokes. The rear shock is brand new as well with a different ratio than what it had. It has a really plush feeling and most of that is attributed to the new linkage.” Kyle:- “Take us through the two strokes. What has changed?” Grant:- “The power delivery on the new 2 strokes is completely different to how it was on previous models. Now, thanks to direct injection it is immediate power. The powerband, when that kicks in it is a lot less noticeable because you now have continuous, smoother power delivery throughout the curve thanks to the electronically activated power valve, which, incidentally you can adjust… you have to be really clever to do it, but you can do it to suit your riding style. All the other upgrades done to the bike to make a huge difference there. The electronic power-valve is huge difference and improvement along with the direct fuel injections on the two strokes which is literally a first of its kind… A fuel injected motocross bike that works.” You’ll have read our intro on these bikes a few issues ago, so we won’t bore you with all of the info – but here’s a quick recap with some comments from our riders… 2-Strokes: The biggest news for the 2023 two-strokes is the addition of throttle body injection (TBI) on select models. Both of Husqvarna’s two-stroke motocrossers, the TC 125 and TC 250, come equipped with this new technology. TBI is an electronic fuel injection (EFI) system that uses a Keihin 39mm throttle body injector to deliver fuel in the traditional manner through a reed valve to the engine. Husqvarna’s TBI system requires riders to premix fuel in 40:1 (TC 125) and 60:1 (TC 250) ratios. The battery for the new system allows for electric starting and there is no kickstarter option on either the TC 125 or TC 250. The power valve is also electronically controlled for 2023, while the injection system has dual injectors to facilitate optimal performance. Ergonomically, the 2023 machines are a marked improvement. The seat has more padding and a better shape; the rider contact points are designed with grip in mind; and even the footpegs are engineered differently. To say that the bikes are all-new is an understatement: The 2023 two-strokes look to be game changers… Husqvarna TC125 While the rolling chassis and much of the 2023 Husqvarna TC 125 is shared across the board with even the big FC 450, the new 125 has its own engine that is entirely different from the TC 250 (and, of course, the four-strokes). Displacing 125cc via a 54.0 x 54.5mm bore and stroke, the revised motor with its casereed induction gets the same electronic newness as the 250: EFI, electronic power valve, choice of two engine maps, and electric starting. Rather than a linkage, the throttle cable directly activates the Keihin 39mm throttle body. Although the basic WP Xact fork and shock are the same as on its bigger brothers, the TC 125 gets its own settings to correspond to its lighter weight. Other commonalities worth mentioning are the new bodywork that makes it easier for the rider to move around plus service the toolless quick-access airbox, TC125 TC250
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Dirt & Trail SEPTEMBER 2022

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