Really is that true? what is the reasoning behind it? visibility? My helmet has an LED in it. wonder if that helps any.
drive safe everybody

ray:.
fas
Yes this is true. It was first studied in New Zealand in a ten year study of bike colors, clothing colors, and helmet colors. This was a very well done study (yes I did read it in its entirity). This study showed that clothing color or bike color did not matter in either crash or fatality statistics. Only helmet color mattered and white reflective helmets reduced fatalities by 24%.
Subsequently a similar study was conducted in Europe. This second study occurred in France and Germany primarily. There were a few Italian data points and a few from UK. But not enough data from outside of France and Germany to make a difference. This was just as well for the Italian data because the motorcycle driving laws do not provide credibility to any Italian based data.
I was consulting on the European study and found the study to be fairly credible. The study had a couple of problems. For one, it did not differentiate between "quality" helmets (for us that would be DOT approved) and low quality helmets. The European study showed between a 24% and a 33% fatality reduction for white helmets. Unfortunately, the investigators did not develop a rider assessment. As a result, they were unable to determine if the observed life-years saved were solely due to white helmets, or whether people who wore white helmets we just more safety minded. I spoke with them about this three or four times, but they claimed that they did not have funding for the additional analysis.
Consequently, I always use the lower number of 24% reduction.
Clearly there are differences between motorcycle driving in New Zealand or Europe and here. However, with a number as large as 24% I am doubtful whether an American based study would result in a significantly lower statistic. What I mean is, even if the statistic was off by 50% it would still be very significant, and should not be ignored.
I tried to develop numbers for trikes (3 wheel motorcycles). However there are too few 3 wheel motorcycle fatalities to be able to make any scientific statements. It is good that in 2011 there were only six deaths on 3 wheel motorcycles. However the lack of data points prevents any science-based statements regarding trikes or Spyders.