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Old Streetfighter Motorcycle Forum Post 08-12-2018, 03:43 AM   #1
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Default Honda f4 air question

Ok so my cbr600 seems to not be able to get over 110, got plenty of revs left but I'm wondering if the fairings and all the RAM air ducts being gone are the reason. Haven't seen much for the f4 on this issue, the air intake setup on the f3 was a lot different and then they went to injection after the f4 so do I need to make some scoops or something to get more air into the air box at higher speeds or am I missing something else?

I just wanna be a pirate, but bikes don't do well in water...
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Old Streetfighter Motorcycle Forum Post 08-12-2018, 05:49 AM   #2
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Default Re: Honda f4 air question

I'd say your on the right path, I know from experience that both fireblades and blackbirds suffer from too much air when everything is taken off ,
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Old Streetfighter Motorcycle Forum Post 08-12-2018, 06:38 AM   #3
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Default Re: Honda f4 air question

Guess I'll lay some stuff out and see what I can come up with, would be nice to have the original ducts to work off of but they are long gone lol.

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Old Streetfighter Motorcycle Forum Post 08-12-2018, 10:51 AM   #4
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Default Re: Honda f4 air question

we're losing the box altogether this time on the bird, using ramair foam socks, see how that goes
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Old Streetfighter Motorcycle Forum Post 08-12-2018, 01:15 PM   #5
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Default Re: Honda f4 air question

Should be interesting, I need to dig through the diagrams and see exactly how air is supposed to move through the system on my f4. I vaguely remember a magazine that tested air pressure through the intake ducts on a dyno and it made a difference in the upper end of the RPM range, I just don't recall the details. The stock air box works pretty good at keeping turbulence down and the mini velocity stacks on the carbs straiten the airflow pretty well so I'll be interested to hear how yours goes without the air box.

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