• Is this headlamp a direct fit replacement for my 1986-2017 FLST model?

  Yes, the MCS 7" H4 headlamp is designed as a direct OEM replacement for FLST models from 1986 to 2017. It uses the same bottom-mount configuration and requires no modification to your existing mounting points. Simply reference OEM part number 67789-91B for complete compatibility confirmation.

• What bulb type does this headlamp use and is it included?

  This headlamp uses a standard H4 bulb rated at 55/60W with 12V operation. Yes, the headlamp comes complete with the H4 bulb installed, plus a position light bulb. If you need to replace the bulb later, any automotive H4 55/60W bulb will work as a direct replacement.

• Is this headlamp street legal and ECE approved?

  Yes, the MCS 7" H4 headlamp is fully ECE approved, ensuring compliance with European road regulations. The prismic reflector lens design and H4 bulb configuration meet all ECE standards for brightness, beam pattern, and light distribution. It's legal for use on public roads throughout Europe and most other markets.

• Is wiring included, and how difficult is the installation?

  Yes, a complete wiring harness is included with the headlamp. Installation is straightforward for most motorcycle enthusiasts. Simply disconnect the old headlamp, remove the three mounting bolts, and install the new unit in reverse order. Connect the wiring harness to your bike's existing electrical connections. No special tools or modifications are required.

• What is the prismic reflector and how does it improve light output?

  The prismic reflector uses a specially designed internal surface with precise angles and curves that focus and distribute light from the H4 bulb more efficiently. This creates a brighter, more controlled beam pattern compared to standard reflectors. The prisms also reduce glare and improve cutoff definition, giving you better visibility without blinding oncoming traffic.

• Can I use LED or HID bulbs in this headlamp instead of the standard H4 halogen?

  The MCS 7" H4 headlamp is designed and certified specifically for H4 halogen bulbs. Using non-standard bulbs such as LED or HID conversions may damage the reflector, void your warranty, and compromise ECE certification. Additionally, improper light output could violate road safety regulations. Stick with OEM H4 55/60W halogen bulbs for optimal performance and legality.

• What maintenance does this headlamp require?

  Maintenance is minimal. Periodically check that the mounting bolts remain tight and inspect the lens for cracks or heavy damage. The clear lens may accumulate dust or light oxidation over time; clean it gently with a soft cloth and mild soap. Replace the H4 bulb when it burns out (typically every 500-1000 hours of use). The sealed unit housing protects internal components from moisture and road debris.

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