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This is a bolt on upgrade kit for your Blackbone 2 Speed system.

You are purchasing a complete 2nd gear of the ratio selected with a pre-fitted custom high ratio 2nd gear hub which fits onto your existing 2 Speed system!!

REMEMBER, these ratios are extremely high and not recommended for small zenoah style engines, choose carefully as picking a ratio above what your engine can pull will just result in terrible performance.

BLACKBONE 2 speed high ratio 2nd gear kit

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