INSIDE LOOK AND VIDEO ON THE 2023 FUEL-INJECTED SHERCO STR 300

• Fuel injection comes to the 2023 Sherco ST two-stroke motors. The throttle body is 32mm in diameter, and there are three sensors—throttle position, atmospheric pressure, and temperature. Sherco touts decreased fuel consumption and an EFI unit weight of just over 12 ounces.

• The motor is lighter by 9.9 pounds—a 25 percent loss.  You still have to kickstart it, though kicking over a trials bike motor isn’t that difficult due to the low frame height. Regardless, Sherco says that e-start is on the way.

• The engine oil capacity has been cut to just over 15 ounces. The clutch cover is magnesium, while the filler hole is angled out to make adding oil easier. A sight glass makes it simple to check the oil level.

• Sherco says the 2023 five-speed transmission is almost 18 ounces lighter than any other trials gearbox.

• The diaphragm clutch  are new, with Sherco claiming a lighter pull and improved engagement accuracy.

• The new 2.3-quart fuel tank contains an integrated fuel pump. The pump is a Sherco design.

• The perimeter chromoly tube frame is nearly 13 ounces lighter than last year. The center of gravity has been lowered on the six-percent-lighter frame, and Sherco claims better traction and more rigidity. The forged aluminum engine hangers are removable for easier maintenance.

• All-new triple clamps are an ounce lighter—a four percent weight loss. To improve appearance, the cinch bolts are at the rear, giving the front a clean look. The integrated steering stops are on the lower clamp.

• The swingarm and linkage system is all-new, with the Reiger shock returning. Sherco engineers dropped the swingarm pivot point by 0.8 inches to give the Michelin radial tubeless tire more traction in slick, dry conditions. The weight of the linkage has been reduced.

• The new steel footpegs are repositioned for improved grip, more central stability, and shed mud easier. Maintenance is simplified by the axle attaching to the footpeg without a nut. The redesigned foot controls have an anti-mud hinge. The gear shifter is two ounces lighter, while the brake pedal has integrated bearings that reduce lateral play.

• A new muffler with a 35 percent increase in volume. Sherco touts a torque increase from the stronger muffler. The tip is thermoformed compressed carbon fiber intended to be more durable.

ENGINE

  • Type: Two-stroke single
  • Displacement: 294cc (250: 249cc; 125: 123cc)
  • Bore x stroke: 79 x 60mm (250: 73 x 60mm; 125: 54 x 54mm)
  • Fueling: EFI w/ 32mm throttle body
  • Induction: Case via reed valve
  • Lubrication: Premix; 100:1
  • Starting: Kick
  • Transmission: 5-speed
  • Clutch: Hydraulically actuated wet multi-plate w/ adjustable diaphragm
  • Final drive: Chain

CHASSIS

  • Frame: Tubular chromoly
  • Handlebar: Oxia
  • Front suspension: Fully adjustable Tech fork
  • Rear suspension; travel: Linkage-assisted fully adjustable Reiger shock; 6.5 inches
  • Wheels: Morad
  • Front tire: 2.75 x 21; Michelin Trial Competition
  • Rear tire: 4.00 x 18; Michelin Trial Competition X11 Radial
  • Front brake: 185mm floating disc w/ Braktec caliper
  • Rear brake: 145mm disc w/ Braktec caliper

DIMENSIONS and CAPACITIES

        • Wheelbase: 51.6 inches
        • “Seat” height: 27.7 inches
        • Ground clearance: 13.8 inches
        • Fuel capacity: 2.3 quarts

 

 

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