Mine is inconsistent as well. I can go 150 miles with no use, and then suddenly it is down. I purchased all the parts to do a top end two years ago but the usage has never got bad enough that I feel the need to tear into it. The bike now has almost 10,000 miles. I just carry one of those small slime bottles filled with oil and have a cap that seals up. I use the slime cap when I top the bike off. Has served me well for 5 day trips and the oil is so easy to add. Never uses even the whole slime bottle of oil on these trips.
Originally Posted by Hayduke
Nope. And I would think it would burn more at high RPM, but that doesn't seem to be the case. I rode it around the Gypsum Hills in KS nearly WFO for a few hundred miles, and didn't burn a drop. Then a 40 mile putt-putt ride the next week, and it dropped halfway down the sight glass.