07 750 Speedo only reads half
First, I'm not new to sportbikes. Just sold my 03 GSXR1000 in February. And yes, i searched, no answers. And no, this isn't a speedo healer problem...
Today i went to go look at a couple bikes. 1 guy has both an 05 CBR600 and a 07 GSXR750. So i took the GSXR out for a test ride, noticed speedo said I was going a lot slower than it felt like I was going. Figured I had just been away from my 1000 too long.
So then i took the CBR out and went about the same speeds, although the speedo was right and said i was going 50-60mph. So hoped back on the GSXR, sure enough, it wasnt me, it really was the speedo only reading about half of what I was going. For example, at 7k RPM in third, it said I was going 30mph.
Also, the FI light is on, not sure why. Everything stock except levers, 520 chain (stock geared), etc. He thinks it's because it needs an oil change, but as far as i know, there is no sensor/FI light for that.