On a two-stroke engine, the height of the ports, especially the exhaust ports, determines the engine's basic state of tune. Raise the ports and the engine is tuned for more
power at high rpm, at the expense of low-rpm power. Lower the tops of the ports and the opposite occurs. What Yamaha has devised for the RZ 350RR is the Yamaha Power Valve System (YPVS), which is an electronically controlled, variable-height exhaust port in each cylinder.
|engine specs||Type:||Two stroke, parallel twin cylinder, YPVS||Displacement:||347 cm3||Bore X Stroke:||2.5x2.1 in OR 64 mm||Compression Ratio:||6.2:1||Horsepower:||54.2/9000 KW(hp)/RPM||Torque:||30/9400 lb-ft/RPM OR 41/9400 Nm/RPM||Fuel System:||2x 26mm Mikuni slide-needle carburetor|
|transmission specs||Gearbox:||6-Speed||Clutch:||Wet, multiplate||Primary Drive:||-||Final Drive:||Chain|
|chassis specs||Frame:||-||Front Suspension:||Telescopic forks air assistance and variable damping||Rear Suspension:||Rising rate Monocross 5-way preload||Front Brake:||Double discs 260 mm||Rear Brake:||Single disc 260 mm|
|dimension specs||Overall Length:||82.5 in OR 2096 mm||Overall Width:||27.6 in OR 701 mm||Seat Height:||31.1 in OR 790 mm||Weelbase:||54.5 in OR 1384 mm||Ground Clearance:||0.6 in OR 15 mm||Weight:||342 lbs OR 155 kg||Fuel Capacity:||4.5 gallons OR 17.0 L|
|tyres specs||Front:||90/90-18 51H||Rear:||110/80-18 58H|
|power system specs||Power pack:||-||Nominal Capacity:||-||Maximum Capacity:||-||Charger type:||-||Charging time (normal):||-||Charging time (quick):||-||Range:||-|