2014 Moto Guzzi California Custom 1400 Boost Plug install, smooth running!

[Lyleh]

This is an old thread but I just installed a booster plug on my 2015 California 1400 Touring. So far I am very happy with the results. The idle is smoother, throttle jerkiness at low rpm is greatly improved, and the low rpm throttle response is much better. Installation is simple - you just have to lift the gas tank to get at the air box sensor.

[blu guzz]

I did this as well when I had my 1400 and also liked the results.  At the time, the bike had under 5,000 miles.  My 2016 had about 18,000 when I bought it and ran so well and still does at 30,000 miles that I did not think about that option this time around.  Break in can really help. 
Either way, such a fantastic bike, enjoy it as it is the end of an era for Guzzi with big block air cooled bikes.