Forrest20 Posted December 30, 2020 Share Posted December 30, 2020 Does anyone know if the bung on the yoshi R77 is wide-band? Link to comment Share on other sites More sharing options...
mossrider Posted December 30, 2020 Share Posted December 30, 2020 The stock O2 sensor threads in. (Whatever size that is) 1 Link to comment Share on other sites More sharing options...
Premium Member blackout Posted December 30, 2020 Premium Member Share Posted December 30, 2020 For what it's worth, narrow band is 12mm, wide band is 18mm. 1 Craig Mapstone Upstate New York Link to comment Share on other sites More sharing options...
Forrest20 Posted December 30, 2020 Author Share Posted December 30, 2020 @blackout thanks, I currently have the R77 on my bike with the stock O2 sensor in it. However, I was wondering what size bung it is because I’m getting my bike dyno’ed and tuned this week and my tuner said it needs to be a wide band bung. Seems to be it’s a narrow band bung, therefore he’s going to have to drill and weld in a wide band one Link to comment Share on other sites More sharing options...
Premium Member blackout Posted December 30, 2020 Premium Member Share Posted December 30, 2020 7 hours ago, Forrest20 said: @blackout thanks, I currently have the R77 on my bike with the stock O2 sensor in it. However, I was wondering what size bung it is because I’m getting my bike dyno’ed and tuned this week and my tuner said it needs to be a wide band bung. Seems to be it’s a narrow band bung, therefore he’s going to have to drill and weld in a wide band one "> Usually dyno tuners feed a wide band sensor pickup into the muffler outlet. Most all bikes will not have a wide band sensor. Craig Mapstone Upstate New York Link to comment Share on other sites More sharing options...
mossrider Posted December 30, 2020 Share Posted December 30, 2020 Just now, blackout said: Usually dyno tuners feed a wide band sensor pickup into the muffler outlet. Most all bikes will not have a wide band sensor. Exactly what we did many times to tune mine. 1 Link to comment Share on other sites More sharing options...
Forrest20 Posted December 30, 2020 Author Share Posted December 30, 2020 @blackout yeah. I’m having the narrow band bung cut off and a wide band welded on. My tuner was just wondering before I drove an hour over to him. Link to comment Share on other sites More sharing options...
Premium Member blackout Posted December 30, 2020 Premium Member Share Posted December 30, 2020 1 hour ago, Forrest20 said: @blackout yeah. I’m having the narrow band bung cut off and a wide band welded on. My tuner was just wondering before I drove an hour over to him. That's a good way to do it. You'll be able to get an adapter to run the narrow band in an 18mm wide band bung after the tune if needed. Craig Mapstone Upstate New York Link to comment Share on other sites More sharing options...
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