This digital tachometer will monitor your RPMs, by connecting to your spark plug. Easy installation – wrap the wire around the spark plug, cap it and mount on. Monitoring your RPMs, will increase the life of your engine, by preventing engine damage due to engine redlining, cracking pistons and excessive wear.
– Displays up to 19,000 RPM
– Works with all bicycle engine kits
– Records hours of engine running time (since device installation)