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Honda CBR 600: Discussion of the Honda CBR 600F1, Honda CBR 600F2, Honda CBR 600F3, Honda CBR 600F4, Honda CBR 600F4i, and Honda CBR 600RR Motorcycles. | |||||||
11-25-2004, 10:01 AM
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| Join Date: 11-21-2004 Location: L.R. AR
Bike(s): 2001 cbr 600 f4i Age: 30 Posts: 13
Rep:  (10) Rep Power: 0
| to be jetted or not??? Hey guys, I recently installed a yoshi slip on & a k&n air filter on my 01 f4i. The throttle response just isn't what I thought it might be. Could I be running too lean? & will getting the bike jetted even make a difference? Thanks...  | |
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11-25-2004, 10:05 AM
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| Join Date: 07-25-2001 Location: .
Bike(s): . Posts: 356
Rep: (25) Rep Power: 8
| Re: to be jetted or not??? FYI, that bike is fuel injected (F4i). You may want to look into getting a powercommander. I would say it's worth it only if you can get a custom map made. Last edited by TCD : 11-25-2004 at 10:05 AM. |
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11-25-2004, 5:55 PM
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| Join Date: 02-13-2004 Location: Lansvale Sydney Australia
Bike(s): CBR600RR Age: 36 Posts: 1,340
Rep: (45) Rep Power: 6
| Re: to be jetted or not??? Yep, and you'll find it's most likely too rich, down low anyway. Get it mapped. Better fuel economy, smoother throttle, more power, power made sooner, need I go on? haha |
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11-25-2004, 9:46 PM
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| Meatarian   Join Date: 05-06-2004 Location: Randolph, MA
Bike(s): 01 R/B 929 Age: 28 Posts: 12,236
Rep:  (909) Rep Power: 26
 | Re: to be jetted or not??? anyone know if the K&N has a smaller element on the F4i like it does on the blades? and as a result actually takes away power because it flows less air?
__________________ "let's face it when you went into that voting booth you had a choice between 2 bowls of sh!t. the only difference was the smell" |
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11-25-2004, 11:15 PM
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 Join Date: 07-29-2003 Location: Central NJ
Bike(s): 99 CBR1100XX (Street), 01 CBR1000RR (Track) Age: 41 Posts: 1,524
Rep: (43) Rep Power: 7
| Re: to be jetted or not??? Trash the K&N. It actually flows too much air. Bikes are really sensitive to tuning and even if you had a custom map made the small engines are hard to get right. Put the stocker back in and you should be ok. Of course the PC will make a great improvement in rideability even if the bike was 100% stock. |
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11-26-2004, 12:02 AM
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| Join Date: 11-21-2004 Location: L.R. AR
Bike(s): 2001 cbr 600 f4i Age: 30 Posts: 13
Rep: (10) Rep Power: 0
| Re: to be jetted or not??? Thanks for the info guys... Looks like I might just have to go on & splurge on a PCIII ...Gotta love this sport!  |
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11-28-2004, 6:30 PM
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| Join Date: 02-13-2004 Location: Lansvale Sydney Australia
Bike(s): CBR600RR Age: 36 Posts: 1,340
Rep: (45) Rep Power: 6
| Re: to be jetted or not??? CBRRob, I don't get that............ if you know what you're doing, a 600 is just as easy to map as a 1000................. easier in some respects coz they don't have as much torque, and therefore don't jump through the lower rpm sections as quickly. PLus, I thought most said on here that the K&N's were flowing less than the originals these days? Anyone tried the DNA filters? flow tests etc? |
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11-28-2004, 10:46 PM
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| Join Date: 07-29-2003 Location: Central NJ
Bike(s): 99 CBR1100XX (Street), 01 CBR1000RR (Track) Age: 41 Posts: 1,524
Rep: (43) Rep Power: 7
| Re: to be jetted or not??? Did extensive dyno testing on my F2 with a K&N, overflow of air. Had a friends 02' Gix600 with one, flowed too much air, dead spots in the curve. Might flow less on big bikes. Just use the stocker! |
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11-29-2004, 7:16 PM
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| Join Date: 02-13-2004 Location: Lansvale Sydney Australia
Bike(s): CBR600RR Age: 36 Posts: 1,340
Rep: (45) Rep Power: 6
| Re: to be jetted or not??? Nah, you missed my point. If you map the bike on the dyno, you match the fuel with the air, do you not? So then how can you get "too much" air? I am yet to see a Jap bike that has an exhaust and filter that doesn't need fuel taken out almost everywhere................ which to me, doesn't say it's getting too much air. But anyway..............an F2 is Carb'd right? Different story. This bike is fuel injected. |
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11-29-2004, 7:20 PM
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| Join Date: 07-29-2003 Location: Central NJ
Bike(s): 99 CBR1100XX (Street), 01 CBR1000RR (Track) Age: 41 Posts: 1,524
Rep: (43) Rep Power: 7
| Re: to be jetted or not??? Like I said, did a friends 02 Gix600, same thing too much flow. So why wouldnt we just put a filter that has the max filter area, or hell, take the filter out and trash the airbox? It dosent work, too much flow. Last edited by CBRBob : 11-29-2004 at 7:23 PM. |
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11-30-2004, 6:11 PM
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| Join Date: 02-13-2004 Location: Lansvale Sydney Australia
Bike(s): CBR600RR Age: 36 Posts: 1,340
Rep: (45) Rep Power: 6
| Re: to be jetted or not??? Yeah, maybe if it's not mapped. But if it IS mapped, and you have the right amount of fuel for the amount of air, PLEASE tell me how this will still be the case? I've run no filter on SP1's 929's 954's 600F4i's, mapped, no problemo. We're going in circles. The original question was.......... If the bike is mapped to the filter or lack there of, how is there going to be too much flow? |
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