954 rev limit mod? - Honda Motorcycles - FireBlades.org
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post #1 of 29 Old 10-24-2007, 7:58 PM Thread Starter
 
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954 rev limit mod?

I have read about the soft rev on the 51 but can not seem to find much about the 954. I saw one guy that said he raised his redline from 12,200 to 13,000. The reason I ask is I do alot of track days at Barbers and would like to hold 3rd longer before turn 5.
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post #2 of 29 Old 10-24-2007, 8:39 PM
 
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Re: 954 rev limit mod?

I've never heard of a rev limiter mod for the 954. The soft rev limiter mod is for the RC51. Personally, I wouldn't want to raise the redline. It's where it is for a reason, I'd think. I'd be worried about damaging the engine. Perhaps a gearing change of some sort would help you out.
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post #3 of 29 Old 10-25-2007, 7:24 AM
 
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Re: 954 rev limit mod?

Her is a link to an old post about this mod

https://www.fireblades.org/forums/hon...rpm-954-a.html
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post #4 of 29 Old 10-25-2007, 11:14 AM Thread Starter
 
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Re: 954 rev limit mod?

I realize it sounds stupid but I have a full yosh system, v stacks, flapper mod, pc3r, and a local dyno shop to work with. I have no interest in more power I just need another 100-200 rpms on one straight. I think I can get enough fuel on top with some tuning and the only time I would do this is on track days. I am going to give it a try and will post results. I tend to agree with one of the guys in the above link that honda is usualy overly safe about redlines in all their engines. I will find out soon enough.
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post #5 of 29 Old 10-25-2007, 11:25 AM Thread Starter
 
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Re: 954 rev limit mod?

also in regard to gear changes, I also use my 954 for alot of street riding and I don't want to raise the rpm's any more for daily driving. Regardless of the way I might sound I take alot of care with her and usualy shift around 6,000 for daily usage. Like I said earlier I really just need a few more rpm's to carry a little more speed down that short straight. Of course we all know these are just track days and it does not really matter but I am a nerd and want to at least check out the possibilities.
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post #6 of 29 Old 10-25-2007, 12:49 PM
 
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Re: 954 rev limit mod?

Doesnt sound stupid at all mate.

If I had velocity stacsks & a full system I would be keen on the extra RPM as those 2 mods will help the power hang on & not tail off for an extra few hundred RPM. You should then be able to utilise some extra RPM to your asvantage.

I was thinking of doing the same mod after geting some head work done & a big bore kit as well as stacks. Then I could put 2 extra teeth on the rear sprocket & effectively gain more grunt withpout losing any speed in each gear - its what they did with the 06-07 1000rr.

Do it & then tell me what its like!
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post #7 of 29 Old 10-25-2007, 8:20 PM
 
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Re: 954 rev limit mod?

I have it on my bike and it does make a difference. Especially with bikes with lowered gearing that will benefit a lot from the overrev.

I have mine on a switch, so I can switch between the two at the flick of the switch.

Only two things to note.
1. Stock, or even with full exhaust it does not feel that its making extra power up there. Still very ussable as overrev, lets say to keep a gear between corners, or save a wheelie... With engine mods, I can see huge potential.

2. When activated, it does alter the fuelling throughout the rev range. Even at idle, it is running richer. So really it needs to be set up with a PCiii on the RR. But I bet this will go unnoticed from most riders. My impression is that the extra fuel, especially down low, makes for a "heavier"/less responsive engine... Now do not take this as a huge problem, as it is not. I strongly believe most people will not even notice.

Also I'm not too sure that it does require extra fuel up there (12-13K). The ECU seems to be doing well on its own. Really it needs to be set up on a RR to make the most of it.
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post #8 of 29 Old 10-25-2007, 8:23 PM
 
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Re: 954 rev limit mod?

oh, and the engine can take it no problem. Had it for years, revved it to the limmiter every single day, many times a day.

no overheating, no strange noises, no extra vibration. everything is normal. Rev limiter still works as before, just higher...
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post #9 of 29 Old 10-26-2007, 11:51 AM Thread Starter
 
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Re: 954 rev limit mod?

sweet
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post #10 of 29 Old 10-26-2007, 4:58 PM
 
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Re: 954 rev limit mod?

So after reading all this I still cant make out if its the same for a UK spec 929???

Am I being thick ....................dont answer that!!

I,m keen to give it a go on my 929.
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post #11 of 29 Old 10-26-2007, 6:38 PM Thread Starter
 
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Re: 954 rev limit mod?

I heard the wiring harness on a 929 is different
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post #12 of 29 Old 10-27-2007, 5:51 AM
 
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Re: 954 rev limit mod?

I have no idea if it works for the 929, but yes, it is different. The ECU is differrent basically so I do not expect it to work.
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post #13 of 29 Old 10-28-2007, 1:02 AM
 
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Re: 954 rev limit mod?

did anyone create a custom fuel map around this mod?

03' Blk/Tit CBR 954rr, Erion full system, PCIIIr, Scott's Damper, Vortex Frame Sliders, Galfer SS Lines, Rear Seat Cowl, flapper pinned.
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post #14 of 29 Old 10-28-2007, 6:01 AM
 
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Re: 954 rev limit mod?

I have seen a few, and might find one or two in my hard drive, but from memory they were nothing special. Or maybe I did not try them enough.

If you have done the mod and are interested, let me know and I will try to dig these out of the hard drive...
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post #15 of 29 Old 10-28-2007, 1:39 PM
 
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Re: 954 rev limit mod?

ill be doing the mod, it looks like it will take a whole 10 minutes lol.. i would be interested in any maps that i could load into my PCIIIR since my erion full system map only shows it being able to accept adjustments up to 12500 with fuel currently being added only up 12K.

M110-015+4.map

03' Blk/Tit CBR 954rr, Erion full system, PCIIIr, Scott's Damper, Vortex Frame Sliders, Galfer SS Lines, Rear Seat Cowl, flapper pinned.

Last edited by vertical954rr; 03-29-2009 at 2:53 PM.
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