2006 919 hornet stutters/surges under acceleration between 3k and 5k.
I have a 2006 919 Hornet that runs like a champ except for one thing. It has this surging stutter thing around 3500ish to 5500ish when accelerating. It feels almost like a bounce, like I am running over very small smooth speedbumps. I have verified it isn't tire pressure or something like that.
Basically, regardless of how fast I am going, if I steadily roll on the throttle it will surge/stutter starting slow and increasing in frequency until I get past 5500rpm. If I crank the throttle and rocket through the rpm range I will never notice it. If I never come below 6k I also never notice it. However, since 1st gear is soo high I find I am hitting the 4500k in 2nd - 4th gear whenever cruising (which is probably by design.
Another way to describe it is that kind of chain-lash you get when closed throttle in 1st gear and you are just barely on the throttle or just chopped it. You know how the engine braking and then rolling on causes a no-load to load situation. Well, it is almost as if the engine is dealing with chain lash at that rpm range.
Those are the best ways to describe it. Other than that, it runs like a dream, it idles and runs smoother than any other bike I have owned (including a VFR800fi and a CBR900RR). Any ideas on what I should be looking for? I have not properly adjusted the suspension for me yet, not enough hours in the day so far and I don't commute like I used to so I haven't gotten around to it yet :-( But seeing as how it appears to be RPM dependent I doubt it is suspension related.
Any help I can get will be much appreciated!