Single-Fire Electronic Ignition System SINGLE-FIRE ELECTRONIC IGNITION SYSTEM Features All the features of the famous Dyna “S”, plus the special feature of firing the front and rear cylinders independent of each other, allowing a much more accurate timing of each cylinder The stock ignition system fires both cylinders at the same time, which works fine for the front cylinder but the rear receives the “wasted” spark when the cylinder has started its intake stroke; this can result in harder starting, increased engine vibration, backfire and raw fuel being spit back into the carb, all creating a power loss Dyno and top-speed testing have shown a dramatic improvement in power in all areas; bikes with hotter cams show the greatest improvement If you truly want to get the most out of your stock, slightly modified or all-out customized Harley-Davidson, you need a Dyna “S” single-fire ignition system For 70-99 Big Twin/XL using a mechanical advance assembly DS6-2  Not recommended for use with OEM coils. On 80-up Harley-Davidsons, an advance weight mechanism is required. This unit must be used with special Dyna coils. Tach adapter is required when using an electric tach. Not for use on Twin Cam 88 models. Click on the Buy it Now! button at the top of this page to immediately proceed with your checkout and payment process. You wil be able to complete your payment and finalize your purhcase without waiting for an email confirmation. I will accept money order,all major credit cards, and personal checks (checks must clear before item shipped) you can pay with a credit card by phone(813-677-2031. Domestic shipments include insurance; insurance is optional on internaltional shipments but is highly recommended. I am not responsible for items without insurance once they are shipped. Shipping If you are bidding on another auction from us, and would like to qualify for our combined shipping discount, you must wait until all auctions have ended to check out. Please do not, however, wait more than 10 days to pay for any order, as this will result in your order being canceled and your item being relisted. Exchange Policy: We do offer an exchange policy if the item is available in our inventory. Due to selling discounted prices we request that the item be shipped exactly as received and that standard shipping be paid to ship an exchanged item back to you. If combined shipping was applied standard shipping still applies for item being exchanged. If you have any questions please email. ABOUT INTERNATIONAL MOTORCYCLE PARTS Motorcycle parts are what we are about. We have been in the buisness 15 years. We have a strong ability to know what fits what as we continue to build top quality machinery right here in our shop. 813-677-2031

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