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Yamaha Raptor 90 cdi box

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Hi I have a Yamaha Raptor 90 with an fmf powercore 4 exhaust header. So I was wondering if an aftermarket cdi box would help with power, acceleration, etc. And, if so, which cdi box would increase the performance the most. Thx.

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Hi I have a Yamaha Raptor 90 with an fmf powercore 4 exhaust header. So I was wondering if an aftermarket cdi box would help with power, acceleration, etc. And, if so, which cdi box would increase the performance the most. Thx.

It might but im not sure how big of a difference would it make.

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It will be a negligible difference, but you would get a little more rev range and that's about it. Aftermarket cdi boxes also tend to burn out in a couple seasons. Factory box is best, but for quicker acceleration and quicker revs, try a smaller, lighter flywheel.

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