Time to revive the thread. I’ve heard everything from wind to road crown to spinning internals (dealership excuse). While there are some forces at work here in almost any of these, I think the point many are minimizing is that anyone who’s complained about this is probably feeling a very noticeable difference to most other bikes they’ve ridden. For example, having ridden several decades, pushing 80k miles total on about 20+ different bikes, I can say I’ve never experienced this kind of pull prior to riding the S1000RR. I checked the rear tire tracking angle first, and found it slightly left, which made sense, so I straightened it. No significant improvement. I decided to track it right by the same margin it was off to the left prior. Some improvement, but again not really noticeable. I checked the clutch cable as in the video. No pressure or tension there. Next up was the front brake line. Nothing. I swapped out the used tire for a new one up front, and it’s SO MUCH BETTER now, but still there. This brings a couple things into play though. The original posts were testing a new bike, and while mine is better now, it’s not gone, so tires are wearing and exacerbating the problem, but aren’t the sole cause. Also, sometimes one can get some weird tension in the forks when tightening the front axle, so I may have alleviated some of that. Hard to say. I’m much happier with the bike now, but I’m not done researching and troubleshooting this issue. There’s much more that affects the geometry, so I’ll be checking steering stabilizer (seals could be looser in one direction than the other, causing small steering input), fork straightness, frame straightness, etc. until I figure out the best answers I can. However, any of these seem too unlikely to be so widespread that it’s such a common thread.
