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I was going through the previous Overdrive Magazine, Nov 2003 issue, the topic was sprocket the rocket, there they have mentioned that if ZAM front sproket teeth is increased to 1 teeth or rear sprocket teeth in reduced to 3-4 teeth the max speed would be in range of 140kmph, the calculation is mentioned is as follow
FT RT MS CFT MS CRT MS
13 42 125 14 134.62 44 119.32
FT-Front Teeth, RT- Rear Teeth, MS- Max Speed, C-prefix to FT,RT for changed,
the Hero Honda Karizma which sports a 13T front and 42T rear sprocket and reaches a top speed of 125kmph. Increase the teeth at the front to 14 resulting in a ratio of 1.08 which ultimately increases your top speed to a 137kmph. On the contrary you want better acceleration but are not so concerned about the top speed achieved then increase the rear sprocket size to 44T which gives you a ratio of 0.95. This gives you better acceleration but reduces your top speed to a 119kmph.
This calculation theoretically looks current, but do we really get any boost in real life changes, would the engine be able to handle the extra speed due to the gearing change.
Has anybody tried this on the ZMA, the ideal combination would be Stock ZMA front speocket with 13T and Ambition rear sproket which has 38T at the rear, this will make the top speed to 138.15 Kmph.
Let me know if any body has tried and ZMA was able to sustain this extra speed load.
FT RT MS CFT MS CRT MS
13 42 125 14 134.62 44 119.32
FT-Front Teeth, RT- Rear Teeth, MS- Max Speed, C-prefix to FT,RT for changed,
the Hero Honda Karizma which sports a 13T front and 42T rear sprocket and reaches a top speed of 125kmph. Increase the teeth at the front to 14 resulting in a ratio of 1.08 which ultimately increases your top speed to a 137kmph. On the contrary you want better acceleration but are not so concerned about the top speed achieved then increase the rear sprocket size to 44T which gives you a ratio of 0.95. This gives you better acceleration but reduces your top speed to a 119kmph.
This calculation theoretically looks current, but do we really get any boost in real life changes, would the engine be able to handle the extra speed due to the gearing change.
Has anybody tried this on the ZMA, the ideal combination would be Stock ZMA front speocket with 13T and Ambition rear sproket which has 38T at the rear, this will make the top speed to 138.15 Kmph.
Let me know if any body has tried and ZMA was able to sustain this extra speed load.
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