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Discussion Starter #1
Just FYI the o2 bung on the R-77 will not fit the wide band o2 that comes with the Auto Tune. I was hoping it would but its about half the size.
 

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Is there any exhaust other than Akra that does?
 

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You are correct that the o2 sensor will not fit the Yosh or Akrapovic slip on systems, Dynojet gives you the correct bung to have welded on, just take to reputable welder and have them remove the one on the slip on and rplace with Dynojet's .....
 

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the o2 sensor bungs for the '08-09 cbr1000 is designed for the european models which have an o2 sensor for the stock ecu system. most of the aftermarket efi's that use an o2 sensor run an m18 sensor bung, where the one on the bike from oem is an m12. r1's are now even using an m10. would be nice having a smaller sensor....or better yet everyone staying consistent...
 
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