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DannoXYZ · July 17th, 2020, 07:58 PM

When upgraded, the FI 250s do end up with about 5bhp more than carbed versions, or right about same HP as 300. Issue with using 300 parts is that fuel & ignition maps won't match 250 engine's flow pattern. It's missing about 2000rpms on high-end of maps. That's not an issue if you plan on reprogramming ECU's maps with software like TuneECU or Woolich.

However, if you plan on keeping 250 stock, it's a lot simpler to just get all parts from 250FI model and install to recreate OEM factory 250FI.

July 17th, 2020, 07:58 PM	#3
DannoXYZ ninjette.org certified postwhore Name: AKA JacRyann Location: Mesa, AZ Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot. MOTY - 2018, MOTM - Nov '17	When upgraded, the FI 250s do end up with about 5bhp more than carbed versions, or right about same HP as 300. Issue with using 300 parts is that fuel & ignition maps won't match 250 engine's flow pattern. It's missing about 2000rpms on high-end of maps. That's not an issue if you plan on reprogramming ECU's maps with software like TuneECU or Woolich. However, if you plan on keeping 250 stock, it's a lot simpler to just get all parts from 250FI model and install to recreate OEM factory 250FI.