Aftermarket Exhaust | Why you don't need a power commander

I've had my Delkevic headers fitted for a while now and I've been wondering why it's caused a flat spot around 4500rpm to 6000rpm and after doing some research, I've narrowed the cause down to what I think is the O2 sensors, lets ride and find out what it's like to disconnect them!
Link to purchase Delkevic Exhaust:
delkevic.co.uk/complete-syste...
O2 Sensor Delete Kit:
www.ebay.co.uk/itm/o2-Oxygen-...
#hondavfr #delkevic #stainlessexhaust

[@eric62backstrom]

I just did full exhaust on my 2003 and used a 330 ohm resistor on each pig tail for the O2 sensors and it runs excellent.

[@ianlukamartinsek9012]

Can u use 330ohm resistor on almost any bike? I have klx250

[@eric62backstrom]

no idea @@ianlukamartinsek9012

[@mysto767francis7]

Good video..straight foward and simple with your experience. .

[@jasonengland2357]

Makes me glad I have a 98 model with no 02 sensors.

[@johnmcelreath4690]

I have a triumph street triple with a k&n air filter on stock exhaust and I have the exact situation you describe. I am going to try this too, thank you so much.

[@REALISMMODSAC]

result??

[@Shift1dwn5up]

Thanks for this video.Very helpful✌️

[@AdrianFourie]

My 2016 Yamaha MT07 started surging from 20 km.h to 90 km.h. It had me baffled. Idlling she is smooth as. Then a mate said look at your exhaust O2 Sensor...cleaned that sucker up and now it's surges way way less. Ordered a O2 Sensor Eliminator and will install that when it arrives. Tx for your video

[@donmo625]

Did it work ? My 2017 mt 07 goes off when idle especially when I want to decelerate and make a turn or overtake a car , and it doesn’t start back till after 4- 5 tries , it also goes off when I start it to warm up , do you know if it’s the 02 sensor , I changed my exhaust to M4

[@AdrianFourie]

@@donmo625 the Oxygen sensor was definitely 90% the problem. The last 10% was the chain binding up. New chain and sprocket sorted that problem. Not sure if it is the same as your problem. Try disconnecting the Oxygen sensor. I did that and it did run smoother after that.

[@donmo625]

Thanks for your reply ? I removed the 02 sensor today and tried to block it with ohms resistor but the problem is still the same , I got new battery today too but still the same .

[@djbgatekeeper]

I recently did this mod on my KTM 690 Duke, so far only a slight improvement but apparently it takes a while for the ECU to settle down after the delete has taken place.

[@dylanvisitacion8618]

Thanks 👍

[@urbanwarior3134]

Seems like the flap valve is a step towards vtec and if the air sensors are used at 6 thousand revs that's the area where vtec kicks in in later models

[@raymondbotha3675]

Just wondering: Does the bike go any different with or without the resistor after you disconnected the O2 sensor and did seasonal temperatures affect the outcome ? Im pretty sure those flat spots are lean conditions specifically for emmisions tests that are extenuated by low back pressure. My 2010 Honda CBF600 chuggs (surges) if i throttle off like when slowing down as the revs go below 3k rpm so i have to pull the clutch in. Ive disconnected my O2 sensor now and it started fine and idled apot on. Will see what a test drive does tomorrow. I can live with my engine chsck light on if the experiment proves fruitful. I bought the bike with a race can already installed and apart from being rudely loud it otherwise rubs great. Im alao going to disconnect the vacumm to the airbox which controls a valve that closes off half the aidbox intake to see what that does ...

[@MotorcyclerideCyprus]

mate you can done two conflicting videos?? the first you say use two 330ohm resistors to plug into the wiring connectors? then you come out with a video saying use a delete kit?

[@dailylife3975]

My 2004 vfr800 does that at steady throttle it surges and sounds like it's running lean no power mis firing then when u Crack the throttle a little it wakes up

[@johnmorkham7954]

Worked for you, great, but should not be seen as general advice. Would be interesting to get different exhaust pipe temps under controlled conditions.

[@mathyses]

do you think the cause could be that the bike goes into closed loop mode. I've read up on this a little bit. And I believe the fueling does 'something' different when it comes to "highway riding." which sounds similar as to what you mentioned, constant RPM I don't have enough experience to conclude I'm having the same issues but good video, and thanks for the informative vid!

[@vfourcruza7744]

It's most definitely that, my man. The resistor tricks the bike into thinking the o2 sensor is working fine when in fact it's not getting a reading, so the bike goes back to its default map (which is a little rich, so if you have a problem with that you might need a power commander anyway)

[@eirikhrafnamundsen9222]

How do you find the 5th gen VFR compared to the VFR 800 F and the CBR 650? Which one do you prefer? Own a 5th gen myself :)

[@vfourcruza7744]

If I had to pick, out of the three I prefer the VFR 800 F over the Fi and the CBR (The CBR just feels small and nothing more than a toy), however the Fi has such a great sound and the power output is almost identical to the F (minus the VTEC obviously). Honestly though, I'm a little biased because I absolutely love the VFR in all its weird sizes and shapes.

[@robsonenduro3316]

resistors doesn't work unfortunately on newer bikes models 2021-22 with Euro5 etc

[@antonylittle3267]

I’ve got a similar flat spot issue on my 98 model after replacing the headers (still have the standard silencer). Just wondering what my options are to try and solve this.

[@vfourcruza7744]

I would try removing the o2 sensor from the picture and seeing what happens, if you're still having issues then investing in a power commander might be a viable option depending on your budget.

[@antonylittle3267]

No O2 sensor on my 98 VFR, and yep fuel controller the next option, but I’m struggling to get hold of a PC3 USB. Cheers.

[@conorthompson9662]

Fuck me you were driving everywhere I drive 😂😂

[@terrymurphy2850]

Can I do this (disconnect sencors) on a v tec 2005 ?

[@vfourcruza7744]

Yes it should work just the same

[@eric62backstrom]

Just need to put 330 ohm resistors in place yep

[@franciscoguizardane9552]

how did you come up with the value 330ohm resistors ?? is this what Rottweiler performance use in its fueling dongles?

[@eric62backstrom]

Somebody figured out that's what resistance the sensors are at when normal riding

[@ianlukamartinsek9012]

@@eric62backstromare 330 resistors good for any bike? For 02 delete

[@jasoncarthew2279]

Would a slight exhaust gasket leak cause mess with the o2 sensor you think

[@eric62backstrom]

Because it sucks air in to the exhaust and that air messes with the sensor reading

[@jasoncarthew2279]

​@eric62backstrom would that cause the engine to run rich or lean

[@REALISMMODSAC]

@@jasoncarthew2279 even leaner because its thinking even more is coming through

[@jasoncarthew2279]

@REALISMMODSAC when i plugg my o2 sensor I don't get no engine light come and noting changes performance wise, It just stays the same bad acceleration

[@REALISMMODSAC]

@@jasoncarthew2279 what bike u have? what year