Contributed by Jarel Jensen

This is a very easy install, and only requires the following general hand tools:

* 8mm socket
* 17mm socket
* Screwdriver or small pry bar
* ft-lb Torque Wrench
* in-lb Torque Wrench (recommended)

First step is to remove the right-side ignition rotor cover.  There are two 8mm bolts holding the cover on.  There is a gasket between the cover and the crankcase, so the cover will probably be stuck on even after the bolts are removed.  Just give it a bump with the palm of your hand or a rubber mallet and it should pop off.  Inspect the gasket and make sure it's not trashed.  

With the cover off, you can see the stock advance rotor.  It is held on by a single bolt in the center.

The bolt holding the cover on is a 17mm bolt, and it is on fairly tight.  Turning the bolt turns the crankshaft, so it's pretty much impossible to keep the rotor from turning while you remove the bolt with a single wrench (unless you have an air impact wrench).  I used the tried and true "jam a screwdriver into it" method to hold the rotor in place while I removed the bolt.  I'm sure there are better ways to keep the rotor from turning, so use your own judgement here.  ** Someone has already reported breaking part of the rotor using this method, so please try something else.  One person suggested leaving the bike in gear and engaging the rear brake to keep the crank from turning, so you might try that.

With the bolt removed, the rotor will just slide right off of the spindle.  Note that there is a single spot on the spindle where there is one wide tooth.  This is the alignment notch to make sure you've installed the rotor in the correct spot. 

Slide the FactoryPro rotor onto the spindle, aligning the tooth-less spot inside the rotor with the wide tooth on the spindle.  It will only go on this one way, so it's impossible to screw it up.

Next, reinstall the 17mm bolt and torque it to 29 ft-lbs.  Again, the rotor will turn as you turn the bolt, so it's necessary to secure the rotor from turning while you tighten it.  Yea...... I used the screwdriver jam again....  Please try something else...

With the bolt torqued properly, you're ready to reinstall the cover.  The cover only goes on one direction, you'll notice it's not round but rather has a small obtrusion at the bottom that must line up with the crankcase.  Install the two 8mm bolts and torque to 104 in-lbs. (if you have an in-lb. torque wrench).  If not, use your best judgement, but keep in mind that 104 in-lbs. is not "as tight as you can get it" but rather just a "slightly snug" level of torque.  You don't want to overtighten and strip the bolt and/or pinch the gasket.

FactorPro claims "snappier part-throttle response" from the rotor, and after a test ride, I would agree that the throttle response is noticeably better.  Don't expect a dramatic difference, but I noticed a difference in the before and after rides.  It seems to snap the power on quicker and pull a little harder in the low-mid revs.