New F4i feels dull and weak 2-5K rpms
#11
#12
RE: New F4i feels it's dull on power
Yeah 2k-5k the fuel curve drops in the motor and raises after around 5500k- 6000k....its apparently for emissions because that where the bike runs when crusing learned from just pickin the brains of some of mech guys at the dealership.....if you wanna get around that drop 1 tooth in the front +2 in the rear on the sprockets and the fuel curve changes, you'll get more torque to, down side is youll run higer in the rpms on the freeway... At 80 mph i sit at 7500k-8000k..if you go that route get a pc3 and get it dyno tuned...or just ride above 5k with out changing the gearing...
#13
RE: New F4i feels it's dull on power
So I'm waiting for the Two Bros slipon. There's are no visable injuries to the headers and beyond . I'll change that, see what happends. If it's still sluggish , Dyno test, but I hope the new exhaust will resolve this matter.
BWF4i, with the PowerCommander do you experience definte improvement in the low-mid rpms ? Did the gas milage dramatically decrese , or, you can barely tell the diff .
BWF4i, with the PowerCommander do you experience definte improvement in the low-mid rpms ? Did the gas milage dramatically decrese , or, you can barely tell the diff .
#14
#15
RE: New F4i feels it's dull on power
ORIGINAL: philnyc
So I'm waiting for the Two Bros slipon. There's are no visable injuries to the headers and beyond . I'll change that, see what happends. If it's still sluggish , Dyno test, but I hope the new exhaust will resolve this matter.
BWF4i, with the PowerCommander do you experience definte improvement in the low-mid rpms ? Did the gas milage dramatically decrese , or, you can barely tell the diff .
So I'm waiting for the Two Bros slipon. There's are no visable injuries to the headers and beyond . I'll change that, see what happends. If it's still sluggish , Dyno test, but I hope the new exhaust will resolve this matter.
BWF4i, with the PowerCommander do you experience definte improvement in the low-mid rpms ? Did the gas milage dramatically decrese , or, you can barely tell the diff .
But deffinately worth it cuz when honda designed the FI system for the f4i there was something not going right i dont remember exactly what the issue was but they decided rather then to fix the problem they told the cpu to put more gas in the motor! And that full curve blows for the emissions....
But go the with the gearing change youll like it...its almost like its a new bike.... i went with a 520 conversion -1/+2 i know you can stay with a 525 and do the same......
hope that helps
#16
RE: New F4i feels it's dull on power
One question, did you notice the loss of performance after the rear-ending incident? I noticed you wrote.... 'from that time'...My hunch is that air flow within the can may have been altered due to damaged seal/or baffles resulting in the power loss
#17
#19
RE: New F4i feels it's dull on power
My buddy rides an Fz6 and he commented that my bike was slow until 8 or 9K. I think yours is normal, Unless your headers or pipesare kinked, they are fine. Go find another guy with the same bike and ask him to ride it.
Edit. If your pipes were kinked you would have no upper end either, too much exhaust volume. You may simply be getting used to the power it has and now you want more grunt. If the slip on make a noticable difference, the problem was probably in your head, not your bike.
Edit. If your pipes were kinked you would have no upper end either, too much exhaust volume. You may simply be getting used to the power it has and now you want more grunt. If the slip on make a noticable difference, the problem was probably in your head, not your bike.
#20
RE: New F4i feels it's dull on power
I agree with Fish. Try out some other guys F4i and see if there's a difference. As for the two bros, you'd likely need to have it mapped to smooth our the power curve, again due to a different air flow regime.
Alsoyour bike ain't choking on no exhaust fumes. The flowrate/mixture settings will just not be optimal leading to lower performance, but not to cause any damage.
Alsoyour bike ain't choking on no exhaust fumes. The flowrate/mixture settings will just not be optimal leading to lower performance, but not to cause any damage.
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DevilInDisguise
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05-09-2011 04:30 AM