ninjette.org - View Single Post - Top speed of ninja 250r with full exhaust?

DannoXYZ · June 6th, 2020, 05:52 PM

Filter by itself? not likely. I dyno-tested K&N's version of similar filter and got nothing over factory filter and airbox. Even dyno-test with no filter at all and nothing gained. Aside from tiny snorkel inlet to airbox, there's nothing to be gained with intake-mods.

Yes EFI version can get more (+9hp), but you must have ALL mods done at once and do dyno-tuning to adjust fuel & ignition-maps optimally (or dyno-tune after each mod). For example, bone-stock Ninja 300 can get +4hp just by re-mapping factory ECU and no hardware upgrades (factory mapping way too rich). Area-P has gotten 250FI to ~39-40bhp with all mods: full-exhaust, pod-intakes, minor head port & polish, and cams along with dyno-tuning to tie it all together.

Dyno-tuning is most important part of upgrades. Every bike is different with production-variations and different levels of wear & tear. Optimum fuel & ignition-maps will be different with exact same mods. Some bikes with just perfect set of tolerances will end up with more power for same mods as others with different tolerances and wear. Only dyno-tuning will bring each one to its max potential.

June 6th, 2020, 05:52 PM	#18
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	Filter by itself? not likely. I dyno-tested K&N's version of similar filter and got nothing over factory filter and airbox. Even dyno-test with no filter at all and nothing gained. Aside from tiny snorkel inlet to airbox, there's nothing to be gained with intake-mods. Yes EFI version can get more (+9hp), but you must have ALL mods done at once and do dyno-tuning to adjust fuel & ignition-maps optimally (or dyno-tune after each mod). For example, bone-stock Ninja 300 can get +4hp just by re-mapping factory ECU and no hardware upgrades (factory mapping way too rich). Area-P has gotten 250FI to ~39-40bhp with all mods: full-exhaust, pod-intakes, minor head port & polish, and cams along with dyno-tuning to tie it all together. Dyno-tuning is most important part of upgrades. Every bike is different with production-variations and different levels of wear & tear. Optimum fuel & ignition-maps will be different with exact same mods. Some bikes with just perfect set of tolerances will end up with more power for same mods as others with different tolerances and wear. Only dyno-tuning will bring each one to its max potential.