Try our re-instated info resource - "Aladdin's Cave" (Main menu)- sorry it's taken so long to fix
Are we against just firing the bike up once a fortnight & letting it run for 5-10 minutes?
The stock answer to that Ted is it corrodes the exhausts from inside out. It needs a really good run to get the exhausts hot enough to boil off the water. You may notice that your 400/4 sometimes drips from the header to silencer joint, that's the water. Best plan is to drain tank and carbs completely and swill some diesel around the tank whilst it's off to stop it corroding. These days Ethanol will attract water from the atmosphere which will sit in the bottom of your tank and rust it. Difficult thing storing bikes for any length of time with the shite that poses as petrol these days.
What's the fuel stabiliser you use, and does it work okay.Sent from my Pixel 6 using Tapatalk