Stevio rusty discs and bolts

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   I ride through the winter when the temp is above 0°C and there is no obvious ice.

This exposes the bike to grit and salt. I clean it regularly through the winter, BUT why is there rust on the disc rotors and also the bolts that hold the rocker cover are not shiny and chromed. The bottom end where - by design - water is collecting and sitting on the bolts is looking grotty.

I also had rust on the mirror clamps under the rubber boot. Not sure if anyone before me has manhandelled that clamp.

I am still comparing to my old Breva 1100 which in 19 years and use throughout the winter has not had that much decay as the Stelvio has in less than ONE year.

Are other Mandello and Stelvio owners seeing the same issues?

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Gazdok Members Profile Send Private Message Find Members Posts Add to Buddy List Falcone Joined: 19 Jan 2018 Location: Leics Status: Offline Points: 28	Post Options Post Reply Quote Gazdok Report Post Thanks(0) Quote Reply Topic: Stevio rusty discs and bolts Posted: 02 Apr 2025 at 12:49
	I ride through the winter when the temp is above 0°C and there is no obvious ice. This exposes the bike to grit and salt. I clean it regularly through the winter, *BUT* why is there rust on the disc rotors and also the bolts that hold the rocker cover are not shiny and chromed. The bottom end where - by design - water is collecting and sitting on the bolts is looking grotty. I also had rust on the mirror clamps under the rubber boot. Not sure if anyone before me has manhandelled that clamp. I am still comparing to my old Breva 1100 which in 19 years and use throughout the winter has not had that much decay as the Stelvio has in less than ONE year. Are other Mandello and Stelvio owners seeing the same issues?
	Stelvio 24 -> Breva 1100 red 05-24,

Stevex Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 24 Nov 2020 Location: North Yorkshire Status: Offline Points: 486	Post Options Post Reply Quote Stevex Report Post Thanks(0) Quote Reply Posted: 02 Apr 2025 at 17:50
	One reason I gave up winter riding decades ago. A bit late now but have a look at using ACF50 next winter.
	Steve

ranton_rambler Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 13 Feb 2015 Location: Stafford Status: Offline Points: 1232	Post Options Post Reply Quote ranton_rambler Report Post Thanks(0) Quote Reply Posted: 02 Apr 2025 at 19:12
	I don’t know which fastener finishes Guzzi specify, but I know that the most common zinc plating method is no longer available as one of the chemicals used in the process was banned in the EU a few years ago. At work we had to change all of our nut and bolt part numbers to a new version with different coating. We opted to go for ‘Dacromet’ mechanically applied zinc as an upgrade to corrosion protection at the same time.