2021 Sherco 300 SEF “Factory” four-stroke.

FIRST LOOK! 2021 SHERCO “FACTORY” OFF-ROAD TWO-STROKES & FOUR-STROKES

The French brand makes two completely different models of their off-road bikes. Both the “Racing Range” and the “Factory Range” models feature a 125 two-stroke, 250 two-stroke and 300 two-stroke, while the four-strokes line consists of the 250SEF, 300SEF, 450SEF and 500SEF.

2021 Sherco 450SEF in action.

According to Sherco, the Racing Range is made for people who love to spend fun time on their bike. It is designed for Sunday rides to all-day trail rides, while the Sherco Factory range has higher-grade premium components and is designed for racing. For MXA’s purposes we are going to focus on the 2021 Sherco Factory race bikes because they comes with the most race-ready components.

HERE IS A QUICK LIST OF THE FACTORY RANGE SPECS:
(1) New 2021 Racing in-mold graphics
(2) Kayaba forks and shock
(3) Akrapovic four-stroke exhaust system
(4) FMF two-stroke exhaust pipe
(5) Keilhin PWK 36 (two-stroke) / Synerjet fuel injection (four-stroke)
(6) Black anodized Excel rims
(7) Sherco bi-composite grips
(8) Blue frame protectors
(9) Blue Selle Dalla Valle seat
(10) Coolant expansion tank with fan
(11) Six-speed gearbox
(12) Michelin tires
(13) 18-inch rear wheel
(14) Fuel capacity 2.75 gallons (two-stroke) & 2.58 gallons (four-stroke)
(15) 260mm Galfer front brake rotor, Brembo hydraulics

2021 SHERCO 125SE “FACTORY” TWO-STROKE

The 2021 Sherco 125SE has a 54mm by 54.50mm bore and stroke. The power valve is electronically controlled. The carb is a 36mm Keihin PWK.

With Kayaba forks and shock the 125SE “Factory” offers 300mm of travel in the front and 330mm in the rear.

2021 SHERCO 250/300SE “FACTORY” TWO-STROKE

The 250SE and 300 SE are virtually identical with the exception of the bore-and-stroke. The 249.3cc Sherco 250SE has a 66.40 mm bore and 72mm stroke. The 300SA actually displaces 293.1cc with the same stroke, but a 72mm bore.
All of the 2021 Sherco “Factory” models come with electric starting include the 125, 250 and 300 two-strokes. The battery is a Shido LTZ5S Lithium.

2021 SHERCO 250/300SEF “FACTORY” FOUR-STROKE

Sherco’s 300SEF “Factory” four-stroke is one of only a few 300cc  four-stroke off-road bikes made. Although the engine shares its basic components with the 250SEF, the bore and stroke are changed on the 300. The bore is upped from 78mm (on the 250) to 84mm, (on the 300), while the crank is stroked 2.6mm. The 300SEF actually displaces 303.68cc.
The fuel injection system comes from Synerjet and the exhaust is a complete Akrapovic system. The tires are from Michelin, which you would expect from a French-built motorcycle.

2021 SHERCO 450/500SEF “FACTORY” FOUR-STROKE

Sherco racers can choose between a 448.40cc version or a 478.22cc big-bore engine. The displacement upgrade is achieved with a 3mm larger piston.

Sherco does not make a motocross version, only off-road models—even though platform sharing would make in very easy to do. All it would take convert one to motocross is a 19-inch rear wheel, small ergas tank, revalved suspension, new mapping and a close-ratio gearbox. Oh yeah, the kickstand would have to go.