The brand-new Chung Yang GP460 engine (Also called R460 or CY460) is a 45.7cc (42mm bore, 33mm stroke) performance machine.
it features a 4 transfer port 42mm cylinder, high-performance case pulsed Walbro HDA-223 carburetor (19mm bore, 15.08mm venturi, independent high and low jets) "hemi"-style combustion chamber, and full-circle crankshaft. The combustion chamber clearances have been improved for better thermal control, resulting in more uniform thermal expansion characteristics and reduced dynamic stress at high operating RPMs! Includes 78mm three-shoe inner clutch assembly preinstalled.
- Displacement: 45.7cc.
- Power: 4.2+HP @11,000 RPM,
- 2.35 lb/ft torque @8,000 RPM.
- Fuel: 91 octane or higher mixed 25:1 with 2-stroke oil.
This engine comes complete with 3-shoe inner clutch, RED 7K clutch springs.
It also may have a stock CY outer bell installed, that is not used on Go-Ped applications.
Carb settings to begin tuning:
- 1 1/2 turns out (L)
- 1 3/4 turns out (H)