[quotemaybe a startup every week or two for 10 mins may help keep the oil's viscosity?][/quote]
Hey HD
Generally, I don't recommend starting your bike in the winter months, unless you can give it a good, long run...say an hour or so, and you can put it under load...so basically, take it for a ride.
In Short, no load start ups have the potential to do more harm than good. Almost 70% of engine wear occurs at start up. You need to get the oil circulating fully to all parts before the aggressive wear is reduced. Cold starts also tend to cause more soot and unburned fuel to build up in the oil. Unburned fuel can cause a reduction in the quantity and quality of lube oil left on the cylinder walls, etc., Short winter starts tend to hurt the lube oil and engine, not help it.
In dry, cold climates (like here in Cranbrook...already going to -17C this weekend) it's better to leave the old girl alone, once you've it put to bed for the winter. See the comments in this thread for more details.
http://forums.banditalley.net/index.php?topic=3391.15