Enduro21 takes a close look at the toughest enduro bike on the planet, Billy Bolt’s 2026 SuperEnduro World Championship-winning Husqvarna FE 350, the factory race bike built to withstand the abuse but with one surprise: “hardly any changes for this season.”

It’s testimony to the toughness of a motorcycle when it can put up with everything this SuperEnduro World Champion throws at it. This is one brutal sport and bikes routinely endure abuse as they hit logs and rocks most average enduro riders would struggle to clear cleanly, yet Bolt hardly blinks as he uses them as kicker ramps to launch off.

Feast your eyes then on this poor bike which has to put up with more abuse than any other, from the rider with arguably the most unbelievable skills in this sport. The term muscling a bike through an obstacle was never so apt as it is with Billy, whose skill is matched by his strength.

But this bike has sailed through another season of that punishment without mechanical issue, and it’s testimony to the race team’s experience and build quality, which we think is every bit as interesting as the details specific to Billy and his set-up.

Billy Bolt claimed his 2026 SuperEnduro World Championship in Newcastle last weekend and Enduro21 caught up with his mechanic, Marc Robert, and Farioli Race Team Technical Director, Christian Ruggeri, for the details behind the blue-and-white log-eating machine which has delivered a sixth straight SuperEnduro crown.

Mix of MX and enduro – with a five-speed box

We know from many previous conversations with mechanics of the pro riders in the KTM/Husqvarna/GASGAS camps that engines come from Austria and go straight into the race bikes.

It is no different here, with the engine in Billy’s FE 350 SuperEnduro bike supplied from the factory just for him — “a Billy special”.

Bolt’s FE 350 is however different to other factory four-stroke motocross and enduro race bikes and quite different to, for example, Taddy Blazusiak’s factory SuperEnduro bikes from the past.

Ruggeri tells us it is basically a motocross top end on the motor and an enduro bottom end, with a five-speed gearbox. It has a stator, flywheel and electrics from the enduro bike to avoid stalling — if you ran a pure MX spec on tight SuperEnduro tracks it can be a problem. The motocross top end is used because they want the motor to be aggressive and built more towards MX performance, but it still needs enduro usability.

One fact worth knowing is that the Farioli race team — long-time base for the factory EnduroGP, Hard Enduro and SuperEnduro squads — do not open or service the engines in-house. That happens in Mattighofen at the race department.

Riders like Billy, Andrea Verona, Josep Garcia and Mani Lettenbichler test different-spec engines ahead of a season. But for 2026 nothing changed, partly because there was little time between Hard Enduro and SuperEnduro seasons, but also because they are very happy with the power and performance. And clearly it works.

FMF pipework

An integral part of the equation is the FMF exhaust system, tailored specifically for SuperEnduro and not a standard production part. FMF have many years’ experience working with world enduro and North American teams and riders and can fine-tune for Billy’s needs and that enduro/mx hybrid.

You’re looking at an FMF 4.1 standard enduro silencer with a special header pipe, “like the motocross but not standard part, designed for Billy and the SuperEnduro 350 engine.”

Protection on the coolant hoses

Speaking of pipework, the double layering around the coolant hoses is primarily for heat protection from the exhaust rather than defence against external damage.

“Not everyone can ride it”

Billy’s mechanic, Marc Robert, is quick to emphasise the bike is largely unchanged for this season: “We didn’t have much time between the end of Hard Enduro season and the start of SuperEnduro but anyway, he didn’t want to change anything. Everything more or less the same as last year. It’s the same bike.

“It’s a special bike that not everyone can ride for sure, it is made for Billy, but from his point of view nothing changes except one small difference in the height of the handlebars. No change to the bars or footpegs but one thing is 1mm higher (4mm from 3mm) spacer underneath bars above the triple clamps.”

Marc explains Billy tried it, went back to 3mm but then decided he preferred 4mm and has stuck with it all season. Asked if he really notices such a small change, the answer is clear: “Oh yes, for sure, something like this he really notices the difference.”

Billy’s handlebar set-up

Look closer at Bolt’s handlebars and firstly you’ll see how neat and tidy everything is — he’s apparently fussy about that.

One grip is longer than the other — yes, you saw that right. This is common across Billy’s bikes. He prefers the clutch-side Pro Taper grip to be stretched onto the bar before being glued and lock-wired tight. The reason is simply to give his hand a bit more room. He also likes the clutch lever bent slightly out from its standard, straighter angle.

Note tough, billet throttle housing on one side but also the kill switch/engine cut-off button facing upwards. Most riders have the kill switch facing towards them, within easy reach of the thumb, as supplied as standard. But when you’re moving around the bike the way Billy does — climbing all over it indoors — there’s a risk of pressing the button accidentally with your body, so they position it up and out of the way.

There’s also a place behind the headlight for the map switch. It’s less vulnerable and neater there, although the team admit they rarely use it.

Foot controls feature Raptor Titanium ‘Edge’ footpegs which are 5mm lower and further back, plus a titanium rear brake tip. Note the shortened gear lever tip, cut down to be less vulnerable and packed with silicone to keep dirt out.

SuperSprox gearing

Another “if it’s not broken, don’t fix it” feature is the final drive gearing which remains 12/50, sometimes 51 depending on the track and with the Japanese RK heat-treated chain.

SuperEnduro tracks are relatively standardised due to arena size and design, typically producing 30–40 second lap times. The motocross gearbox provides more ratios than they need and the aim with gearing is to set the bike so second gear can be used for the entire lap if possible.

Tracks varied slightly more this season compared to previous years, but rolling speed through rocks and log matrixes, clearing concrete pipes in 180-degree turns and firing from nothing over jumps (or non-jumps, in Billy’s case) all happen in second gear.

That’s borne out by a story Billy’s former mechanic Lee Edmondson told us: “he bent the gear selector shaft in practice before Superpole. With no time to change it, we sent him out without a gear lever at all — and because it worked fine, they left it off for moto one as well. He won.”

Brake changes

The Brembo master cylinder and caliper set-up remains the same but the Moto-Master brake discs do not. Last year Billy ran “Flame” rotors front and rear but for 2026 they have upgraded to a rear solid ‘mud’ disc (stronger) and a conventional front disc — effectively returning to a previous rotor design. Disc protectors are Husqvarna accesories parts.

Tyres and mousses

“I use a Michelin super-soft rear tyre but with a medium mousse,” Billy told us. The soft tyre in SuperEnduro allows more grip and feel, but running a standard enduro mousse (rather than a soft one) counteracts excessive tyre roll or deflection when hitting logs.

WP Suspension “pretty horrible to ride”

As noted in previous Pro Bike features, there’s nothing visually unusual here. The WP Pro Components forks and shock are the same as customers can purchase.

However, spring rates and settings are clearly much firmer than standard because of Billy’s strength and riding style. The way he attacks obstacles and hammers a track makes this a bike which is, in his words, “pretty horrible to ride if you were doing normal enduro.”

The rear suspension linkage is from the motocross bike, which means it sits slightly lower at the rear. That’s partly why he opts for the 20mm-higher Blackbird Racing seat to compensate.

The frame and geometry are standard FE 350 — nothing special or modified as some previous champions have used. The Husqvarna Technical Accessories triple clamps are off-the-shelf and unchanged in ‘26.

No frame protectors

A couple of seasons ago there was a trend for skateboard-style grip patches on the side panels, but that has faded with the latest-generation race bikes in this paddock, plus the latest gen Huskys have a slightly different shape behind the rider’s legs.

What hasn’t changed indoors is removing the side frame protectors. Billy still prefers them off, making the bike fractionally narrower between his legs — important in a sport that demands so much body grip and effort.

Sump guard design blocking dirt entry

A feature first seen last season is the different design unbranded carbon-fibre sump guard. It wraps neatly around the Husqvarna frame, protecting engine cases and extending under the linkage.

What makes it different is the extra lip between the frame down tubes under the front exhaust. It helps prevent dirt dropping inside the guard and adding weight — a detail many skid plate designers might take note of.

Protecting the beast

Additional protection covers the water pump housing and vulnerable electronic components, like where the wiring enters/exits the flywheel casing, is all about eliminating any possible reason a bike might fail to reach the flag. Considering how these machines crash into rocks, the logic is clear.

As mentioned earlier, it’s proof of the build quality that this bike can withstand so much punishment with zero mechanical issues season after season.

Thanks to Marc Robert and Christian Ruggeri

Photo Credit: Future7Media | Nicki Martinez