SMP Vacuum Operated Switch Kit - 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.
Achieve custom tuning for your V-twin with the SMP Vacuum Operated Switch Kit, designed for unparalleled precision. This self-assembly kit empowers you to select specific calibration levels, optimizing your engine's response. Engineered from high-tech thermoplastics and rigorously factory-calibrated, each unit is vacuum-tested for accuracy and reliability.
Why riders pick this
- Self-assembly with preset calibration level selection
- 100% vacuum tested for verified accuracy
- High-tech engineered thermoplastic construction
- Controls emission systems and fuel delivery
- Optimizes idle and cruise characteristics
The SMP Vacuum Operated Switch (VOES) Kit is an essential component for V-twin riders focused on custom tuning their Harley-Davidson or Indian Motorcycle. This switch plays a critical role in controlling emission systems and fuel delivery by interpreting engine vacuum. It allows tuners to dial in crucial idle and cruise characteristics, especially on carbureted or early fuel-injected engines, ensuring your V-twin runs as efficiently and powerfully as possible.
Custom Calibration for Optimal Performance
- Self-assembly kit with preset calibration levels for tailored tuning
- 100% vacuum tested to guarantee accuracy and consistent performance
- Includes mounting bracket, crimp terminals, and detailed installation instructions
- Constructed from high-tech engineered thermoplastic for extreme durability
- Designed to optimize emission systems and fuel delivery
Fine-Tune Your V-Twin's Response
For those running modified V-twin engines, the ability to fine-tune the VOES is paramount. This SMP kit offers the flexibility to match the switch's behavior to your specific engine setup, whether you've upgraded cams, exhaust, or carburetor. By precisely controlling the vacuum response, you can eliminate hesitation, improve fuel economy, and ensure your engine delivers smooth, predictable power across the entire RPM range. Consult the included instructions for guidance on selecting the best calibration for your build.
Specifications
- Brand: Standard Motor Products (SMP)
- Manufacturer Part #: MCVOS4
- UPC: 091769544560
- Length: 4.9 in
- Width: 3.35 in
- Height: 2.7 in
- Weight: 0.21 lbs
Common questions
What is the function of a vacuum-operated switch in a V-twin?
A VOES is used to control emission systems and fuel delivery based on engine vacuum, helping tuners dial in idle and cruise characteristics on carbureted or early fuel-injected engines.
Can I choose different calibration levels with this kit?
Yes, this is a self-assembly kit that provides preset calibration options. You select the level that best matches your specific engine tuning needs during installation.
What is included with the SMP Vacuum Operated Switch Kit?
The kit comes complete with the vacuum switch, mounting bracket, crimp terminals, and comprehensive installation instructions.
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 | 275-01153 |
| WEIGHT | 0.21 lb |
