SKU: 27096668523

MSD CDI ECU ENHANCER IGNITION, 650 701 YAMAHA SUPERJET JS650 JS701 4253

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Description

MSD CDI ECU ENHANCER IGNITION, 650 701 YAMAHA SUPERJET JS650 JS701 4253Overview: 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 acceleration and throttle response due to advancing the timing. Then as the rpm increases, the timing is

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 acceleration and throttle response due to advancing the timing. Then as the rpm increases, the timing is retarded to the factory setting to prevent detonation and engine damage. For racers, there is also a lower rpm limit that you can activate for quick and consistent holeshots. By activating a switch mounted on the handlebar the rpm will limit at approximately 3,000 rpm. The instant the button is released, the rpm revs up just as normal and you rocket off. Everything you need to install the Yamaha Enhancer is supplied along with factory connectors for a direct plug-in installation!

Features:

    Application:

    Year Make Model Submodel Engine Size
    1990 - 1993 Yamaha SJ650 Super Jet /

    Specs:

    Brand MSD
    Emission Code 4
    Maximum Voltage 30 KV
    Primary Resistance 0.2 Ohms
    Product Type Ignition Box
    Secondary Resistance Less than 2000 OHMS
    Turns Ratio 2.91736111111111
    Warning California Proposition 65
    Warranty Limited 1 Year Warranty
    Shipping Notes
    • Free Standard Shipping on $100+ Orders to the USA.
    • Except Preorder products are shipped in 48 hours.
    • Delivery to the USA:
    1. Standard Shipping : 3-10 business days
    • If time is of the essence, please consider selecting expedited delivery for faster service.
    Exchange/Return Notes
    • We offer a 30-day return/exchange service after receiving.
    • Final sale items are not eligible for returns or exchanges.
    • To process your return/exchange, please contact us at [email protected]
    • Please click here for more details>>> Return & Exchange Policy
    SKU: 27096668523

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    4.3 ★★★★★
    Based on 23 reviews
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    J
    Verified Purchase
    Jordan W.
    Houston, US
    ★★★★★ 5
    Suprisingly great jeans.
    Special Size: Midweight, Size: 29W x 32L, Color: Grey Wash
    Love the fit and style of these. The waste is abnormally small, I purchased a 29 but also 30 would have been better. The rest of the fit is great, color is great, good mix between stretchy and stiff.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on February 10, 2026
    A
    Verified Purchase
    Amazon Customer
    Omaha, US
    ★★★★★ 5
    I like them, would buy again.
    Size: 34W x 32L, Color: Tinted Light Wash
    Fit nice, dont look nor feel cheap. The fit is nice and true to whats marketed. Material is not hard.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on June 4, 2026
    P
    Verified Purchase
    Pen Name
    Pawtucket, US
    ★★★★★ 4
    Too baggy! (UPDATE): Bought this style of jeans again and they fit great!
    Size: 31W x 30L, Color: Tinted Light Wash
    These jeans are too baggy for my liking. Edit: I purchased more jeans of this style recently again and for some reason they fit a lot better to my liking than before when I first left the initial review for this. I have updated my review from 3 stars to 4 stars now. I purchased the black, grey, dark wash and tinted medium blue, and all 4 had a good fit on me. My original review stated that it was too baggy but the 4 jeans I just bought had a fitted look which is what i prefer, not too baggy and not to slim/skinny. I want to point out that the fit varies from the color choices. For example, the black, grey and dark wash jeans, i went with a size 32x30 because 31x30 for those colors were too tight/slim on me and for the tinted medium blue, i downsize to 31x30 because 32x30 for this color is too baggy. So buy the size you usually wear and if it's too slim or baggy then send it back and size up or down. Buying jeans on Amazon, i feel that you will have to buy a few different sizes and see which one fits you the best and then go from there. Edit (3/7/26): sizing is very inconsistent. So my previous edit above stated that the jeans I recently purchased fit great on me, and that's true, so I decided to buy another jean, same color and same size, this time the jean fit way too small/tight. I feel like amazon needs to do better quality control on these jeans. How does 2 pairs of the same jeans/color/size have such an inconsistent in size/fitting to it!
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on December 14, 2025
    A
    Verified Purchase
    Amazon Customer
    Dallas, US
    ★★★★★ 5
    Great fitting jeans just as nice as any name brand you can buy !
    Size: 34W x 28L, Color: Tinted Light Wash
    So I have been on a weight loss journey and the Amazon jeans have been my go to. For one to me they are just as nice as any of the name brands. They fit well are comfortable and honestly they are all I have purchased for a few years now. I’m also super short and this is one of the few brands I can find in a 29 length and that also saves me money since I don’t have to take them to a tailor to be modified. Material is nice to the touch nice thickness and has all the pockets you would expect in a blue jeans. Again great value for the money and this is about my 5th pair of these in various colors. I highly recommend give them a try and you will be hooked !
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on December 14, 2025
    M
    Verified Purchase
    marissa
    Port Orchard, US
    ★★★★★ 5
    Definitely a repurchase!
    Size: 31W x 30L, Color: Tinted Light Wash
    Love these jeans! Fit so well and feel great too
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 16, 2026

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