Not every Rider needs complex and expensive engine tuners to meet their needs. Most Riders with stock bikes or those making exhaust and/or air cleaner upgrades just want ensure their engine runs properly.

Nightrider's Patented XIED technology is designed to work with OEM closed-loop ECM's to maintain or improve fuel mixtures. 

Nightrider.com has taken its microcontroller based AF-XIED and created the most sophisticated and one of the smallest NBO2 AFR Gauges you will find. You can monitor one or two O2 sensors with specific displays for heated and non-heated sensors. There is a mode to display the average of the two sensors. You can also see the last 20 seconds of history. Another Nightrider exclusive design. 

The Nightrider.com Motorcycle Performance Guide provides reference information and upgrade ideas for Harley-Davidson and other motorcycle high performance engine modifications. From simple upgrades to hot street performance or drag racing, there is something here for you when you need to 'wrench' your bike.