So you added the speedo healer with stock gearing?
I just put new sprockets on my FZ1 trying to wake the bike up. I needed a Speedo healer since my error was 15%. The guys at Yamaha who neutered this bike need to be beaten badly. The gearing change only made a marginal difference. The engine is dead below 5K revs. Gonna cost a lot of money to fix it.....
I got a new steel rear sprocket off ebay cheap for my Busa so I decided to get a speedo healer fot it too.
Mine is stock, I set the Speedohealer at -7.5%. It is pretty much right on up to about 80 or so....still off a bit in the upper range.. 161 indicated is actually 158 on gps.
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