Its the same ratios just weaker in many ways. Very efficient though the 1k box has thinner gears and the engine only 3 main bearings :) If you use a 4.3 or 4.5 rear the combo is surprisingly peppy and 59mm stroke vs 70mm means it revs very smooth. recently I drive a 660cc kei truck daily with 5.1 rear & a blast for what it is. Gets to 60 or 80 very quickly and gets about 20-22km per 1 litre but its 3 cylinders with 12 valves and twin cam all alloy bike like engine that redlines at 9000rpm but can go higher.
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