1) Engine
* 449cc liquid-cooled, four-stroke single with titanium valves
* Revised engine tuning provides stronger low-through mid-rpm performance, with the same championship winning top-end rush
2) Top End
* High-acceleration cams with revised timing help the engine rev more quickly
* Camshaft lobes and tappets feature a soft-nitride surface treatment for long wear and high-rpm reliability
* Hand-finished surfaces of the polished intake ports improve intake efficiency at all rpm
* Lightweight titanium 36mm intake and 31mm exhaust valves and aluminum valve retainers reduce reciprocating weight for reliable valve control at high rpm
* Double valve springs help ensure stable valve operation
* Screw-type automatic cam chain tensioner with oil pressure spring
* Revised ignition timing helps boost power
* Low-friction coating on piston skirt
3) Bottom End
* Crankshaft, rotor mass centralization, oil circulation, and ignition timing have been carefully examined to help ensure ideal engine braking characteristics
* Crankshaft and connecting rod are sintered for additional rigidity
5) Starting
* Features highly reliable auto-decompression system; the dual-weight centrifugal decompression system fitted to the exhaust cam eases starting, and its simple construction helps to ensure reliability
* Hot start system gives quick starts when the engine is hot, and the hot start lever is unitized with the clutch lever
6) Exhaust
* Larger 41mm titanium exhaust header for increased power
* Tapered exhaust pipe joint helps increase ultra-low rpm power.
* Titanium exhaust pipe heat shield
* Silencer uses long-fiber packing for lower maintenance
7) Cooling
* High-capacity Denso radiators deliver superior cooling efficiency
* Slim radiators feature tightly packed cores and fins designed to enhanced heat dispersion
8) Shifting
* New 5-speed Transmission offers better choices for dealing with tough rhythm and tight technical track sections
* New ball bearing shift lever for smoother shifting
* Revised ratchet-type shift mechanism for smoother shifting and a more positive feel
9) Frame
* Frame is wider at the rider's ankles, for better grip and narrower around the seat for a slim riding position and enhanced maneuverabilit
| Place of Origin: | China| |
| Model No: | QH-090 |