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MSD CDI ECU ENHANCER IGNITION, 650 701 YAMAHA SUPERJET JS650 JS701 4253 SKU: 4253 Brand: MSD Condition: New Manufacturer Part Number: 4253 UPC: 085132042531 Overview: If you own a Yamaha with a 650 or 701 engine, this Enhancer is a necessity! The Enhancer produces a powerful spark with increased spark duration. Not only does the improved spark energy boost power, but this Enhancer features a more aggressive timing curve for even more power to get you going! At lower rpm you'll notice incredible ...

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