Motorcycle Emission Standards

Asian countries have a very large population of motorcycles and mopeds and these vehicles are estimated to contribute very heavily to urban air pollution. Taiwan and India have lead enforcement of stringent emission limits for two wheelers. Although the USA and Europe have implementd emission regulations for the two wheelers many decades back, but the number of these vehicles not being very large the standards were not tightened for a long time. However, now in these countries too very stringent limits are being enforced. Motorcycle emission standards in some countries are given in Table 4.8. Presently, most countries follow different test procedures. However, as discussed earlier, a world motorcycle test cycle has been developed and in future most countries are expected to use WMTC.