FE/FC Happy 2015 to me! New 501s

Ordered mine from Doubletake directly, and just checked again on the "build your mirror" function. My receipt says "B" ball, and when you do the online order build, it show this for the ball;

Ball Stud Base
Threaded Base for 10mm x 1.25 thread pitch.
Compatible with all Honda, Kawasaki, KTM, and Suzuki bikes, and left side of Yamaha.

RAM Part Number: RAM-B-349U

Check out the Sicass Racing mounts for the Brembo perches. They work good for me and its billet aluminum.

Thanks guys! I do have the correct part number on hand; however, it seemed too big....I just went ahead and screwed them on. They're on now

decooney, have you balanced your wheels yet? I get some pretty bad vibrations at about 45mph when riding on the street. If you have balanced them, how much weight did you use? I'm planning on doing the balancing just as on the DIY videos on bestdualsportbikes.com

gameover, not yet on this bike. Yes, I get oscillation at 45mph too. I did all the balance stuff on my last bike (Beta) with dual opposing rim locks and weights but it was not perfect. I may try something different this time around. I see some guys are using the light weight motion pro rim locks. After I get a chance to go ride and burn these stock tires off I'm going to get new tires and might remove the rim locks all together and see how it goes for some upcoming rides that I'll be running higher pressures. My KTM 690 Enduro did not have rim locks and the wheels were fine, no vibes, with regular Pirelli MT21 knobby tires. I suspect the factory knobbies and rim locks on the 501S all contribute to the issue you see. Maybe try pulling the rim lock out all together on the front wheel as as test and see how much it improves?