I think he means the US spec FZR 600 flywheel, with four evenly spaced teeth, one longer than the others.
seeing as how this has gone from a discussion of flatslides to megasquirt, perhaps the thread title should be modified?
Also, here's my .02 about megasquirt:
Intake air temp sensor IAT $20
manifold air pressure sensor MAP - included on most megasquirt boards, for microsquirt probably about $40
coolant temp sensor $20
O2 sensor - for a wideband about $200, for a narrow band about $30
R6 throttleboddies $50 (get the 03-05 and r6s version. Will have to be modified for spacing)
High pressure fuel pump $60 depending on what bike you hack it off of.
To trigger the ignition, i was planning on grinding down the long tooth, and using the flywheel as a 4-1 missing tooth trigger wheel. Megasquirt can understand this and fire the coils in wasted spark mode using this method. The problem is signal conditioning the vr sensor. (v3 megasquirt has provisions for this, so it's not completely off the chart) I would not add edis4 because you have to mount 2 more parts to the bike. Megasquirt can take care of everything (ignition and fuel) without these modules, so i would keep it simple.
A note about the MAP sensor: This is not necessary, and possibly a poor way to measure engine load on such a small displacement high revving engine, with such a small "plenum" volume ( the thing is there really is no plenum...). An alternate way to measure load using megasquirt is to just use the TPS which will come with the throttle bodies. Instead of Map vs. RPM fuel maps and ignition maps, you will have TPS vs RPM maps. This is called Alpha-N fueling. Map based fueling is called Speed-density.
Also, this has been done before on a fzr engine, just in a yzf, by diztroy. This shows how he adapted the throttle bodies to fit on the motor:http://www.oldskoolyzf.com/gallery2/mai ... g2_page=26
For some interesting reading... (interesting for some boring for others)http://www.megamanual.com/v22manual/mwire.htm
Maybe we should start a megasquirt thread in the wiki?