M900 / 900SS Crankshaft Rotation Question (Attn 1994-98 M900 Owners!)

[nomadwarmachine]

I have just finished installing a 1P Nichols flywheel onto my 1996 SS/CR (same motor as 1994-98 M900). I used a rattle gun to remove the rotor nut and then I torqued down the nut again to 120 ft/lbs after installing everything while being careful to align the flywheel and rotor properly. When I reinstalled the L/H cover, I noticed some light resistance when rotating the crank. The resistance is a periodic slip without any interference.

I finally got around to removing the motor and making a video of the engine rotation. Note that the jangling noise you hear in the video is coming from the clutch basket -- NOT on the alternator side. This slip/slip resistance is constant throughout the rotation. There is no tight spot in a single position. It leads me to conclude that this is the magnetism of the rotor, but I always thought these were supposed to turn very smoothly (which it does when the rotor/cover are off).  Wish I had checked rotation before removing the alternator (bike ran fine) but I did not.

Can anybody with a 1994-1998 M900 or 900SS let me know if this slight resistance on rotation -- about every 20 degrees -- is normal for these motors.  I prefer not to tear down the motor unless necessary.  Bike ran very well before I took it down to do the flywheel.

[Speeddog]

That's what the 1P rotor/stator does.

Definitely a moment the first time you try it.

[nomadwarmachine]

That's what the 1P rotor/stator does.

Definitely a moment the first time you try it.

Thought you would know!!   

Very much appreciated.  Now I can finish rebuilding the top end.