Can someone tell me where the O2 sensor is on a 2005 R1?? If the Cat was removed would this affect the O2 sensor??

I am looking at a 2005 R1, that is mine pending a test drive. He said that he removed the Cat, and that's the only reason I can think of that the bike Dyno'd low. (which it did).
Any help would be appreciated.



Also, if this is the case, how easily can that be fixed?

Did he get the bike dyno'd before and after on the same dyno.


you will get different results on diff dyno's

He got is dyno'd after everything was done to it...


I called the owner, and he said I must have been mistaken. He looked at the sheet and said it Dyno'd at 147... I must have forgotten what it was... Still seems a little low, but not as low as 140.

It's got a BMC race air filter in it too... Up here in the rockies, that actually restricts. They always tell you to stick with stock...

So I dunno...