Join Date: Apr 2015
Location: Murrysville, PA, USA. A pleasant, wooded suburb of Pittsburgh.
Riddler, Welcome to the forum! Your bike's fan behavior is normal - the thermostat tends to switch on the fan whenever there is little/no airflow over the radiator - ie, at very low speed and at stops. If the insectoid sound of the OEM fan annoys you, I suggest changing to a SPAL 5.2 inch puller fan, an upgrade very popular with North American owners. Besides much better build quality and reliability, the SPAL is straight-through (no shroud), thus more efficient aerodynamically and moves more air. It thus runs for significantly less time than the OEM fan to bring down the temp. Additionally, one of the great assets of the SPAL fan is that it is quiet, a whisper compared to the OEM.
Members of this forum have developed a simple and ingenious fix for stalling, after it was discovered that erratic operation of the sidestand switch seems to be responsible for many/most cases of this behavior. Here is the fix (credit to John Wayne and Hoover): With the sidestand down, you will find a magnetic bolt on the rear side of the stand near the top. Unscrew this bolt. Place a washer underneath the bolt and refit it to the stand. Clean the magnetic bolt and the sidestand switch carefully. You are done. The washer now holds the magnetic bolt closer to the switch when the stand is retracted, so it operates the switch more firmly, eliminating most cases of stalling.
Use the forum's search function to find how-to threads on both of these mods.
"If you don't know where you're going, you might wind up somewhere else."
2015 390 Duke
1980 Moto Guzzi V50 II (becoming a cafe racer)
1984 Moto Guzzi SP 1000
Last edited by Diploman; 06-19-2017 at 10:04 AM.