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I considered efficiency modifications for cbr125r.
To determine if an efficiency mod is financially viable here consider the following.
Hypothetical
Efficiency Mod cost = $100.00
Petrol consumption per 100km = 2.5L
Cost of litre of petrol = $1.22
Cost of petrol per 100km = $3.05
Percentage Petrol consumption saved = 50%
Money saved per 100km = $1.53
Distance traveled = 100,000
Money saved in 100,000 km = $1,525.00
Money saved minus cost of efficiency mod = $1,425.00
If that last number is not positive then its not worth doing. If you were to make an expensive fairing that manages to save a few hundred dollars over 100,000 that would be worthwhile. However if the bike falls over and the fairing breaks you lost all your savings.
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