Ace Rimmer wrote:
Claude wrote:
Any scooter is all right by me. One Less Car using up valuable resources and polluting the planet.
Most bikes and small engines, especially 2 strokes, have higher emissions than cars and trucks (take a look at California's emission laws regarding 2t motors). The catalytic converter on bikes are far less effective or non existent. While the CO2 levels are lower from less gas being burnt (with a cat exhaust), the CO and oxides of nitrogen from the 2t oil inhibiting the fuel from burning completely, are significantly higher. Scooters are polluting machines and do nothing to help the planet. Better gas mileage helps your wallet, not the environment.
Not totally correct.
first off, there are no California emissions laws regarding two strokes; they have to meet the same standards as any other gasoline engine. no more or less strict.
Second, pre-2006, the stella actually met California tailpipe emissions. what kept it out of California was the lack of an evaporative emissions system. i.e. it had a vented gearbox and gas tank.
third, genuine did develop and test a prototype 2t stella that met post 2006 California emissions, however the LML strike in 2006 led genuine to turn the focus to the PGO-sourced models, predominantly the buddy. the buddy turned out to be such a cash cow with much less warranty issues that Genuine shifted resources, putting more towards the PGO/Buddy products and to not bring the stricter emissions compliant genuine 2t to market. the modifications were not that extensive, a supplemental air system like the new PX's have and an evap containment system. they even had some 90% produced that ended up sitting on LML's factory floor during the strike, until LML sold them for parts to raise some cash halfway thru the strike. if the strike wouldn't have happened, we would have had 2t stellas in california in late 2006 or early 2007.
fourth, there is a DIRECT comparison of 4t 150 scooter to stella 2t 150 scooter that can be made. Bajaj. in the early 2000's both the Stella and the Bajaj were tested and EPA certified and these numbers can be found with enough google digging. from memory, the CO emissions on the stella were something like four times less than the Bajaj, and the oxides of nitrogen emissions were something like 20% higher on the two stroke.
while two strokes can pollute more than a four stroke, it isn't necessarily so when the same level of emissions reduction technology normally applied to most four stroke automobile engines is applied. this isn't usually the case, and the stella is probably one of the last efforts we'll see to do anything like that.