~ Where passion meets precision · Atelier Haarlem since 2010 ~
Most turn signals in our range are E-approved (ECE certified) and therefore legal for road use in Europe. Check the product specifications for the exact certification.
Our turn signals are universally applicable to most motorcycles. Check the thread size (usually M8 or M10) and electrical specifications (12V). If in doubt, contact us with your motorcycle model and we'll help you.
Yes, when switching from incandescent to LED turn signals, you usually need an LED-compatible flasher relay. Without it, the LED lights will flash too fast (hyperflash). You can also use a load equalizer as an alternative.
Sequential (running) turn signals illuminate the LEDs one by one in the direction of the turn, giving a dynamic and modern effect. Normal turn signals flash all LEDs simultaneously. Both types are ECE-approved.
Most turn signals have a standard thread mount (M8 or M10). Connect the wiring according to the color scheme: usually yellow/orange for the turn signal and black for ground. For 3-in-1 combo lights, add red (taillight) and an extra wire for the brake light.
Orders placed before 15:00 are shipped the same business day. Delivery within the Netherlands is usually the next business day. Belgium 2-3 business days, rest of Europe 3-5 business days.
Yes, you have a 14-day cooling-off period. Unused products in original packaging can be returned. Contact us at info@dappermotor.com for a return label.
More questions? View all FAQs
Koso Turn Signal Wire Adapter Set for Harley-Davidson Models
Installing aftermarket turn signals on your Harley-Davidson just got easier. This Koso wire adapter set provides the perfect solution for seamlessly connecting custom turn signals to your H-D electrical system. Whether you're building a stripped-down bobber, a sleek cafe racer, or a classic cruiser, this adapter set ensures a clean, reliable installation without cutting or splicing factory wiring.
Built for durability and designed specifically for Harley-Davidson fitment, this adapter kit eliminates guesswork and delivers professional results. Keep your electrical system intact while upgrading to the turn signals of your choice. Perfect for custom builders and enthusiasts who demand quality connections and hassle-free installation.
Koso Turn Signal Wire Adapter Set for Harley-Davidson Models
Installing aftermarket turn signals on your Harley-Davidson just got easier. This Koso wire adapter set provides the perfect solution for seamlessly connecting custom turn signals to your H-D electrical system. Whether you're building a stripped-down bobber, a sleek cafe racer, or a classic cruiser, this adapter set ensures a clean, reliable installation without cutting or splicing factory wiring.
Built for durability and designed specifically for Harley-Davidson fitment, this adapter kit eliminates guesswork and delivers professional results. Keep your electrical system intact while upgrading to the turn signals of your choice. Perfect for custom builders and enthusiasts who demand quality connections and hassle-free installation.
Delivery time: 3–5 business days
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