Changed to a full system aftermarket pipe a few days ago and while great in the low end, it killed the mid-high end.
As described in here.
http://www.cbr250.net/forum/cbr250-...l-system-pipe-has-killed-my-acceleration.html
Took it back to the Honda dealer today and we decided to reset the ECU. They had to check the shop manual how to do it and it was done by unplugging and then reconnecting a small 4 pin connector under the left rear faring.
Finally got to open it up a bit after 20km (busy, wet roads) and still felt a bit slower than stock going up to 7500rpm, then it just takes off - almost like a 2 stroke when it gets to around 8000rpm. Amazing difference. So the results of this pipe and reset ECU shifts the powerband higher up in the RPM.
More testing to be done over the next few day's commute, so will see if I prefer it to stock. But would recommend resetting the ECU to anyone who has changed the pipe.
btw I had done about 120km over 3 days on the new pipe before this.
As described in here.
http://www.cbr250.net/forum/cbr250-...l-system-pipe-has-killed-my-acceleration.html
Took it back to the Honda dealer today and we decided to reset the ECU. They had to check the shop manual how to do it and it was done by unplugging and then reconnecting a small 4 pin connector under the left rear faring.
Finally got to open it up a bit after 20km (busy, wet roads) and still felt a bit slower than stock going up to 7500rpm, then it just takes off - almost like a 2 stroke when it gets to around 8000rpm. Amazing difference. So the results of this pipe and reset ECU shifts the powerband higher up in the RPM.
More testing to be done over the next few day's commute, so will see if I prefer it to stock. But would recommend resetting the ECU to anyone who has changed the pipe.
btw I had done about 120km over 3 days on the new pipe before this.