Details

Autor(en) / Beteiligte

• Crisara, Matt

Titel

KTM Used Fuel Injection to Revamp Two-Stroke Engines

Ist Teil von

• Popular mechanics (New York. 1959), 2023-03 (1), p.74

Ort / Verlag

New York: Hearst Magazines, a Division of the Hearst Corporation

Erscheinungsjahr

2023

Quelle

Nexis Uni

Beschreibungen/Notizen

• Fuel is then fed through tiny passages called “jets,” which control how much gas flows into the combustion chamber—most carbs feature two jets, with the main jet controlling the fuel mixture at mid to high RPMs and the pilot jet controlling from idle to the middle of the rev range. Manufacturers kept plugging away at roughly the same recipe for decades until Yamaha released its YZ400F four-stroke dirt bike, which won its first race (1997 Las Vegas Supercross) with relative ease. “The thermal stress on components like the piston and conrod along with the difficult air-fuel mixture preparation are a no-go for a motocross bike,” says Florian Bretterebner, head of off-road engine development at KTM.