I have tried to put together a detailed description of my rotor replacement on my 2012 FZ1. This job is truly a 1-hour job (or less)… but if you don’t pay attention to the details, it can become a lot of work.
Part I covers the rotor replacement. If the process is all done well, then you’re golden.
Part II covers replacing the bearings if you have a brain failure like I did, and reverse the spacer on the inside end of the rotor, or if you just decide that you need to replace the bearings after removing the rotor. I haven’t seen any detailed info on what it really takes to replace the bearings, so I created Part II.
Part I: Replacing the Gen II Generator Rotor:
There is plenty of information out there to guide you through the rotor replacement, so rather than go through that part in extreme detail, I have provided links to the videos from RM Stator and Copperdawg, and also a link to a bit of background on the stator issue itself.
I have provided some supplemental information to go along with the existing information that I discovered along the way, but I didn’t want to simply repeat the information in the videos. The videos are priceless… I have taken a few screenshots from the videos at key points.
I have not tried to duplicate information that I had found for the rotor replacement work. For the details described, I may have gotten pretty deep in the weeds, but I didn’t want to leave out any details that may be important.
Gen II FZ1 Generator Rotor Replacement
Parts and where to find them:
This is where I started. The idea was to just replace the potentially defective generator rotor with the new, updated rotor, to prevent the older version from failing (magnets coming loose).
Part 1 (below) is the new redesigned Rotor, Part Number 2SH-81450-00-00.
Part 3 (quantity 3) are the three (longer) screws that hold the stator to the bearing housing
From Partzilla:
https://www.partzilla.com/catalog/yamaha/motorcycle/2012/fz1-fzs10bw/generator
That site covers the rotor, stator, and the stator mounting screws (long screws). The crankcase gasket, bearings, and the rotor sleeve that I reversed (and associated O-ring) are located on this site:
https://www.partzilla.com/catalog/yamaha/motorcycle/2012/fz1-fzs10bw/crankcase-cover-1
See the diagram below.
Note that the parts we are concerned with in this project are the portions of the diagram below the “Partzilla.com” copyright mark.
One more page from Partzilla is the starter page:
https://www.partzilla.com/catalog/yamaha/motorcycle/2012/fz1-fzs10bw/starter
In the diagram below,
Let’s get started!
The initial Plan: Replace the rotor and gasket. In this section, I rely on Copperdawg’s video for details, but some of the related details are also shown in the “replace” bearings (Part II). Skim that section if you need additional information.
Ordered: October 4, 2022
Part I of this thread starts in Post 2 below
Part I covers the rotor replacement. If the process is all done well, then you’re golden.
Part II covers replacing the bearings if you have a brain failure like I did, and reverse the spacer on the inside end of the rotor, or if you just decide that you need to replace the bearings after removing the rotor. I haven’t seen any detailed info on what it really takes to replace the bearings, so I created Part II.
Part I: Replacing the Gen II Generator Rotor:
There is plenty of information out there to guide you through the rotor replacement, so rather than go through that part in extreme detail, I have provided links to the videos from RM Stator and Copperdawg, and also a link to a bit of background on the stator issue itself.
I have provided some supplemental information to go along with the existing information that I discovered along the way, but I didn’t want to simply repeat the information in the videos. The videos are priceless… I have taken a few screenshots from the videos at key points.
I have not tried to duplicate information that I had found for the rotor replacement work. For the details described, I may have gotten pretty deep in the weeds, but I didn’t want to leave out any details that may be important.
Gen II FZ1 Generator Rotor Replacement
Parts and where to find them:
This is where I started. The idea was to just replace the potentially defective generator rotor with the new, updated rotor, to prevent the older version from failing (magnets coming loose).
Part 1 (below) is the new redesigned Rotor, Part Number 2SH-81450-00-00.
Part 3 (quantity 3) are the three (longer) screws that hold the stator to the bearing housing
From Partzilla:
https://www.partzilla.com/catalog/yamaha/motorcycle/2012/fz1-fzs10bw/generator
That site covers the rotor, stator, and the stator mounting screws (long screws). The crankcase gasket, bearings, and the rotor sleeve that I reversed (and associated O-ring) are located on this site:
https://www.partzilla.com/catalog/yamaha/motorcycle/2012/fz1-fzs10bw/crankcase-cover-1
See the diagram below.
Note that the parts we are concerned with in this project are the portions of the diagram below the “Partzilla.com” copyright mark.
- Part 10 is the crankcase cover gasket (needed for rotor replacement)
- Part 3 (quantity 2) are the pins in the bearing housing that position the stator. The pins seem to want to stay in the housing, so I didn’t replace them.
- Part 4 is the bearing housing that is pressed into the crankcase cover.
- Part 2 is the bearing that is captured between the bearing housing and crankcase cover.
- Part 5 is the collar that rests in the recess of the bearing housing after the bearing is pressed into the housing. This collar gets a lot of attention in Part II.
- Part 6 (quantity 3) are the screws that go in from the outside of the crankcase cover and screw into the threaded holes in the bearing housing.
One more page from Partzilla is the starter page:
https://www.partzilla.com/catalog/yamaha/motorcycle/2012/fz1-fzs10bw/starter
In the diagram below,
- Part 11 is the inner bearing that presses into the engine case
- Part 8 is the spacer that I reversed that created my bearing problems
- Part 10 is the O-ring that fits inside the spacer (Part 8) I replaced the spacer and O-ring when I replaced the bearings.
Let’s get started!
The initial Plan: Replace the rotor and gasket. In this section, I rely on Copperdawg’s video for details, but some of the related details are also shown in the “replace” bearings (Part II). Skim that section if you need additional information.
Ordered: October 4, 2022
- Rotor Part # 2SH-81450-00-00 $551.68
- Crankcase cover gasket Part # 2D1-15451-10-00 $5.49
- Total outlay, with shipping and tax: $590.60
Part I of this thread starts in Post 2 below
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