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Old October 16th, 2018, 11:52 AM   #11
DannoXYZ
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Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011

Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C

Posts: A lot.
MOTY - 2018, MOTM - Nov '17
That's about 10-lbs in weight-savings at outer-edges going with lighter tyres and lighter-weight wheels like the v-Rossis. There's some Marchesinis that are even lighter, but costs 15x more.

I went with 428 due to unpredictable reliability issues with 415. That's nice in-middle solution between 415 vs. 520:

415ER = 1.92-lbs
428NZ = 2.99-lbs
425VM = 3.66-lbs (X-ring)
520V = 3.56-lbs

Nice thing about smaller pitch is you can get finer control on gearing-ratios. I use 18x59t or 18x58t which lets me redline just at end of longest straights at Buttonwillow or Thunderhill. Both those gears are "in-between" 520 14x45t (too tall) and 14x46t (too short).
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