Lowering your Motorcycle's Gearing


How often do you do 250km/h, or more? Obviously here at Motorcycle Thailand, we all hit this speed most mornings on our commute through downtown Bangkok, hahaha. Okay lets keep it serious, the last time one of use was doing 250km/h is some time back and was surely not something we do daily...

But even we would admit that maximum speed is generally less useful than acceleration. Lowering the gearing on your motorcycle can make a massive difference to the performance, particularly on many modern sportsbikes, which tend to have revvier, top-end-biased delivery.
Adding two or three teeth onto the rear sprocket, or removing one from the front sprocket will make your motorcycle feel livelier, and sharper, for minimal cost.

Bigger changes in ratios may mean you need the chain shortened (or a longer chain). So remember the next time you buy another set of sprockets and a chain, it's maybe a good idea to change a few teeth.
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Jeffrey

Saturday, 14 May 2011 @ 07:38 AM ICT
You forgot to mention "At the cost of fuel economy" it's all a math numbers game but by adding a few teeth to the back or removing one or two from the front, may change fuel milage 10-20% sometimes even more. The smaller front sprocket cost usually 1/3 or 1/4 the cost of the larger rear sprocket and is easier to change not having to remove the rear wheel and tire. Personally for me on many of my bikes I ADDED a few teeth to the front sprocket. My Honda CBR150 with 2 more teeth now get 45 -47 km/l .(over 100 mpg) While on my Kawasaki Ninja 250, it is not running at 9000 rpm anymore at highway speed any more, It is lowered to 6000 rpm and my fuel economy has raised up 14% now getting 80+ mpg. Better than my wife's Yamaha Mio 125 that tops out at 88 km/h
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