aluminum vs lightened flywheels?

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I have a nichols aluminum flywheel in my M695.  I think it's a little over a year old at this point with about 6k miles on it.  No problems at all.  I would not go back to the stock flywheel, but as mentioned the nichols requires a finer touch on the throttle and the engine braking feel is a bit different.  There might be some more vibes, but nothing irritating or mirror-blurring.  I have no issue with around town riding.  I had it out recently to do some shift linkage work and the flywheel splines looked absolutely perfect.  Just a datapoint...

BK

+!

I too have the Nichol's on my M900.
No issues in traffic at all.