In the motorcycle area, we have made further progress in expanding the use of four-stroke engines for cleaner exhaust emissions. We have also made efforts to introduce new technologies to upgrade fuel economy.
Our environmental commitment has also focused on the reduced use of harmful substances such as lead.
Main targets for fiscal 2000 in Japan Expanded use of four-stroke engines Improved fuel economy for new models Main achievements in fiscal 2000 in Japan The share of four-stroke engine motorcycles is up to 53.5%. (A 9.4 point increase as compared with fiscal 1999.) Fuel economy of the new model Dio has been improved (to 75km/l on constant speed fuel economy at 30km/h).
1. Progress in the Targets to be Achieved by 2005 with the Improvement of Exhaust Gas Cleanliness
Transition in total HC emission (FY1995: 100)
Share of models with 4-stroke engine(in Japan)
Targets
Up to fiscal 2005 : To reduce the total exhaust emissions of HC to approximately 1/3 for new vehicles (compared with fiscal 1995)
*
Total for Japan, US, EU, and Thailand
Progress
In 2000, eight types equipped with a four-stroke engine for cleaner exhaust gases were placed on the market in Japan, with the share in Japan of four-stroke engine motorcycles raised to 53.5%. As a result, total HC emission from new motorcycles is down to approximately 26% compared with 1995. In Japan, this value is down to about 21%.
2.Improvement in Emission Performance of Honda's Main Models
Clean emission levels achieved with the SILVER WING
SILVER WING
The ''SILVER WING'' that received type approval in March 2001 reached a clean emission level equal to half the exhaust emissions standards of Japan or even less for all the emission components: CO, HC and NOx. This is the result of the following new technologies being used.
Use of newly designed PGM-FI (electronically controlled fuel injection system) *1 Air injection system*2 (Secondary air induction system) Use of oxidation catalyzer
*1
*2
See page 29.
Air injection system: To enhance the exhaust gas cleaning performance of motorcycles, this system adds external air to the exhaust gas from the engine's combustion chamber so as to combust the unburned gases and thereby reduce the residual levels of carbon monoxide (CO) and hydrocarbons (HC).
1. Progress in the Targets to be Achieved by 2005 with the Improvement of Fuel Economy
Transition in average fuel economy (FY1995: 100)
Targets
Up to fiscal 2005 : To improve average fuel economy by approximately 30% (compared with fiscal 1995)
*
Total average for Japan, US, EU, and Thailand
Progress
In fiscal 2000, eight motorcycle models equipped with a four-stroke engine for better fuel economy were placed on the market in Japan, with the share of 4-stroke motorcycles significantly increased. As a result, we have been successful in achieving approximately 12% improvement in average fuel economy as compared with 1995.
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Main targets for fiscal 2000 in Japan
Expanded use of four-stroke engines
SILVER WING 
