How difficult is the installation?
Not difficult at all. Along with easy installation, the ReCyclizer requires
no changes to the standard cables of your motorcycle. Just unplug and
click on the ReCyclizer and you're ready (some models require a removal
of some panels to install the ReCyclizer).

Does it affect fuel efficiency?
Fuel consumption is only slighlty increased because the system is
effective at RPM changes. On the other hand lambda sensors adjust
to leaner mixtures in continuous stages. A smoother running motorcycle
with better gas response will invite you to play with the throttle, increasing
fuel consumption accordingly.