faffi Posted February 15, 2011 Report Share Posted February 15, 2011 I know my interests are somewhat peculiar, but when I noticed that there was more than 8.5 seconds difference in lap times between a Pirelli Diablo Supercorsa SP and a Shinko 005 Advance fitted to a CBR1000RR circulating Willow Springs - http://www.motorcycle-usa.com/545/8285/Motorcycle-Article/2010-Street-Motorcycle-Tire-Comparison.aspx - I couldn't help but think way back when. The difference between a 1997 Ducati 916 (as well as the GSX-R750) and an old Honda CBX six - obviously not tested on the same day - was 15 seconds out of which around 4 came from track improvements, making the difference perhaps as little as 11 seconds. The two '97 models were riding on Dunlop D364 tyres, perhaps the stickiest street legal rubber of its day. The CBX ran narrow stock tyres fitted to 2.15 in narrow rims. Considering the advancements done regarding suspension, power, weight, handling and tyres, it isn't surprising that the bikes from 1997 were significantly quicker than those of the 1977 CBX. But that tyres alone could produce lap times of such difference today wasn't something I expected at all. BTW, does anybody know if Willow Springs have been changed (to the worse) since 1997 when it comes to lap times? In 1977, Cycle set a 1:43 on the CBX. On the improved track (smoother, grippier asphalt and some slightly altered corners if memory serves) Cycle World posted 1:28 laps with the 916 and Gixxer. However, in 2010, Motorcycle USA could only muster a 1:31.5 on the Pirellis and 1:40 on the Shinkos. Whatever the reason for the differences, be that lesser riders or different track layout, my "statistics" should still be valid. Anyway, if you find these things interesting, please chime in. If not, well, at least I did Link to comment Share on other sites More sharing options...
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