March 20th, 2012, 08:48 PM
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#26
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ninjette.org guru
Name: Jason
Location: Houston, TX
Join Date: Nov 2011
Motorcycle(s): 2007 Ninja 250 (sold), '06 Ninja 650R
Posts: 455
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Quote:
Originally Posted by sombo
You have it backwards a little. The pre-gens DO have a higher compression ratio; 12.4:1 vs 11.6:1. However, that gives the pre-gen slightly less mid-range and better top end. Pre-gen: 28.05 bhp (20.92 kW) @ 12500 rpm and 13.15 ft·lb (17.83 N·m) @ 9,000 rpm tested at rear wheel. New-gen: 26.4 hp @ 11,000 rpm (rear wheel) and 13.6 ft·lb (18.4 N·m) @ 9,750 rpm.
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That is what I meant. The pre-gen has a higher compression ratio which is why the current gen has more mid-range and less on the top.
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