For various reasons, my '85 K100RS sat in my garage all last year--didn't fire it up at all. When I did get back to it, I changed spark plugs to an NGK equivalent of what was in there previously. Since starting it after its layoff, I have a pretty strong case of oil burning on start up lasting for 5 minutes or so. Never had that before. Is this more likely due to sitting up for a year or is it related to plugs that might not be exactly the right size? I know-- this sounds a bit nutty, but there is no difference in the bike from last year to this except the plug change. Ideas?