Repsol250 Posted October 7, 2013 Report Share Posted October 7, 2013 Hello Riders, I put an aftermarket exhaust on my 13" CBR250R. While I'm riding when I have the throttle hardly on, i hear little backfires. It only happens when I'm maintaining my speed. Is there a way to reset my ECU? If there is, do I have to go to a dealership? I'm wondering if the only way is getting a Power Commander to fix this problem? If that is true then is there a little cheaper equivalent to the PCV?Thanks for any help given. Quote Link to comment Share on other sites More sharing options...
Tonik Posted October 7, 2013 Report Share Posted October 7, 2013 Check the exhaust for leaks real good before you go any further. Quote Link to comment Share on other sites More sharing options...
Gixxus Christ! Posted October 7, 2013 Report Share Posted October 7, 2013 You have little backfires because you have a smog pump type emissions system that injects clean air into the exhaust to burn away emissions. Your old muffler was quiet enough to mute the backfires. Your new one is not. You need a kit to block off the air injection inlets and an ecu override like power commander to remap your ecu to run with the aftermarket exhaust. Quote Link to comment Share on other sites More sharing options...
Repsol250 Posted October 7, 2013 Author Report Share Posted October 7, 2013 You have little backfires because you have a smog pump type emissions system that injects clean air into the exhaust to burn away emissions. Your old muffler was quiet enough to mute the backfires. Your new one is not. You need a kit to block off the air injection inlets and an ecu override like power commander to remap your ecu to run with the aftermarket exhaust.Any chance you know what this air inlet kit is called? Quote Link to comment Share on other sites More sharing options...
Anden Posted October 7, 2013 Report Share Posted October 7, 2013 SAI (Secondary Air Injection) block off plate. If one is not available you will need to get a Power Commander or a Tune Boy type tuner. But I would hit up a CBR 250 Forum they would have much better info than us. I do remember seeing or reading somewhere that the Yosh pipe needed no tuning done to the bike. Quote Link to comment Share on other sites More sharing options...
Connie14 Posted October 7, 2013 Report Share Posted October 7, 2013 You may want to check a CBR specific website for the information. Somebody may have the info posted with directions and photos. Quote Link to comment Share on other sites More sharing options...
Repsol250 Posted October 7, 2013 Author Report Share Posted October 7, 2013 Can I buy a used PCV and delete the maps on it and install the maps from PCV website? Or are the maps a one time install? Quote Link to comment Share on other sites More sharing options...
Tonik Posted October 8, 2013 Report Share Posted October 8, 2013 Can I buy a used PCV and delete the maps on it and install the maps from PCV website? Or are the maps a one time install?You can do that. Sometimes web maps work ok. But really, listen to the other peeps. Blocking off the air injector ifs the easiest cheapest fix. Quote Link to comment Share on other sites More sharing options...
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