Less noise and smoother running after doohickey upgrade?
I finished my doohicky with torsion spring mod by flashlight last night and added fresh oil this afternoon. The odometer was at 560 miles.
Anyway, on the initial start up and subsequent test ride I noticed that it sounded more quiet and there was less "chugging" while in taller gears at low RPM.
I'm wondering if the additional tension of the torsion spring might somehow make the counter balancing system operate more smoothly?
Alternatively, maybe the swap to Yamalube 10w40 is responsible?
Option #3, emptying the tank of *non* ethanol fuel and refilling with 10% ethanol made the bike more responsive? One would think that the opposite is more likely, though.
#4 The engine is broken in, having become more so within the last 50 miles.
Lastly, it's my imagination.
Regardless, it feels like a different bike and I learned a few things in the process.