I have a 2007 Kawasaki Ninja EX250R, it's a great little bike. I do alot of freeway driving and would like to increase it's top end speed/reduce RPMs. At 9,500-10,000 rpms it runs about 68 mph. It's currently geared with sprocket gears (14T-45T). What gearing configuration should I use to run comfortablly at 75-80mph?
You can change the sprockets.If you go to a 16 tooth front sprocket. two teeth on a front sprocket is like droping 4 teeth on the rear. You could drop 2 teeth on the rear sprocket but a 43 tooth is probably harder to find. the usual choices for front are 14,15,16 tooth.
For the rear they are 44,45,46 tooth
The way to remeber gearing changes is on REAR sprocket is smaller=faster and larger=slower top end.
the FRONT is OPPOSITE to the rear smaller=slower and bigger=faster.
You may have to lengthen or shorten the chain depending whjch way you go.
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