1x YX Gearbox. Standard Gearbox Ratio (Counter/Main) ALWAYS FIT NEW SHIFT FORKS WITH NEW GEARBOX. 1st = 34/13 (Ratio 2.61). 2nd = 29/17 (Ratio 1.70). 3rd = 23/17 (Ratio 1.35). 4th = 21/20 (Ratio 1.05).
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