SMP Relay Switch Starter & Brake with Diode - Harley & Indian V-Twin
About SMP
Standard Motor Products supplies ignition, sensor and electrical components across the automotive and powersports markets, with V-twin parts covering switches, sensors and ignition hardware.
Keep your V-twin firing reliably with the SMP Relay Switch, designed as a direct OE-style replacement for both starter and brake circuits. This switch integrates diode protection to safeguard your electrical system from voltage spikes. It's built for consistent and dependable starting performance.
Why riders pick this
- Direct OE-style replacement for starter and brake circuits
- Integrated diode protects against voltage spikes
- Ensures consistent and reliable starting
- Heavy-duty construction for long-term durability
When your Harley-Davidson or Indian Motorcycle starts showing signs of an aging electrical system, a failing relay is often the culprit. The SMP Relay Switch with an integrated diode offers a robust solution, ensuring your starter engages consistently and your brake circuits function without compromise. This isn't just a replacement; it's an upgrade in reliability for your V-twin.
Enhanced Electrical Protection
- Direct OE-style replacement for seamless integration
- Integrated diode protection against electrical spikes
- Reliable, consistent starting performance for your V-twin
- Heavy-duty construction with a bright, durable finish
Restore Your Ride's Dependability
A weak or intermittent relay can leave you stranded, but replacing it with this SMP unit restores confidence in your bike's electrical heart. Installation is straightforward for most V-twin platforms, making it an ideal choice for riders looking to maintain peak performance without complex modifications. Pair it with other electrical system checks for complete peace of mind.
Specifications
- Brand: SMP
- Manufacturer Part #: MCRLY4
- UPC: 091769325428
- Length: 4.3 in
- Width: 2.4 in
- Height: 1.5 in
- Weight: 0.12 lbs
- Country of Origin: China (Mainland)
Common questions
Is this relay a direct replacement for my V-twin?
Yes, this SMP relay is designed as a direct OE-style replacement for V-twin motorcycle starter and brake relays, simplifying installation.
What is the benefit of the integrated diode?
The integrated diode protects your electrical system by suppressing voltage spikes, which helps extend the life of the relay and other connected components.
Will this relay improve my motorcycle's starting performance?
If your original relay is worn or faulty, replacing it with this SMP unit will restore reliable and consistent starting performance for your V-twin.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | SMP |
| TYPE | Switches |
| SKU | 275-01093 |
| WEIGHT | 0.12 lb |
