Stuart Racing
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posted November 27, 2006 03:47 PM
Low rpm hesitation
Experiencing a low rpm(off idle to about 3500 to 4000)...Like when leaving a stop light to get going,it just kinda flutters,then boom she gets up and goes....Mods are Muzzy S/S full sys.P/C3,18/49 gearing,stock filters for now,(on order),installing the K&N's, I think might help the problem?????Tip of the pipe is sooty....Was setup by previous owner for all out dragrace....I want it for street/strip....
Thanks,
Paul.....
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shane661
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posted November 27, 2006 03:55 PM
This sounds like the typical muzzy flat spot. Mine is flat untl about 2500 rpm. Then the power spike will attempt to highside you (if temps outside are less than 40 degrees). According to Doug Meyer it can be tuned out.
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Stuart Racing
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posted November 27, 2006 04:06 PM
Yes I here ya on the high sideing....You damn sure have to pay attention with this drivability condition....I can live with it , but just wanted to see if others have experienced it too....Thanks alot Shane....Gotta get her on a Dyno and a laptop...
Paul...
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shane661
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posted November 27, 2006 04:10 PM
I have tried two different maps (one Muzzy supplied and the other a custom$$ Map). Both are flat until 2.5-3k. But it does sound great and scream on top....
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Stuart Racing
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posted November 27, 2006 04:15 PM
I have the Muzzys map in mine too...Do you have some after market filters and did it help at all.....I usually rev. it up past the flat spot on takeoff sometimes anyways...But if I don't i have to feather the clutch a little bit more than usual...
Thanks......
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shane661
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posted November 27, 2006 04:25 PM
 Edited By: shane661 on 27 Nov 2006 16:25
I can email you a good map that made 178 hp on the dyno, with K&N's. I just cleaned my K&N's and ran 184.6 mph at Maxton with 187 mph gearing (I am 225+gear). Pm your email and I will send it to you....
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supra5677
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posted November 27, 2006 05:05 PM
advance your ignition timing 5 degrees that flatspot will go away
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shane661
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posted November 27, 2006 05:11 PM
Edited By: shane661 on 27 Nov 2006 17:14
Mine is advanced +4 across the board, and the flat spot is still very pronounced. The map was done by Doug Ray at Spencercycle (for another '02 with k&N's...and it still had the flat spot, just as mine).
I would venture to say that out of 50 people, only 2 or 3 have tuned that flat spot out. I am not going to debate it....it is what i have seen. If you are one of the lucky ones, congrats!
And for the record, I still love my Muzzy...flat spot and all.
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Stuart Racing
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posted November 27, 2006 05:40 PM
Like I said .I can live with it too...But glad to here that IT CAN be tuned out....I thought it was just nature of the beast....Thanks Supra too for your input.When I get her on a dyno/laptop,she'll get the timing added...Thanks all...
Paul....
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shiphteey
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posted November 27, 2006 09:14 PM
Muzzy = flat spot. Mine has always been like that. Unless you're doing lots of riding in the twisties and need throttle control to be 100% perfect all the time I say screw it, you bought the 12 to go fast, not putt around @ 3-4k.
Nice sig, btw.
A.
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entropy
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posted November 27, 2006 09:29 PM
quote:
... I say screw it, you bought the 12 to go fast, not putt around @ 3-4k. .
shifty?? how do you pronounce yr tag??
I gotta admire your balls to the wall attitidue; but some folks do putt down to the Walgreens when Geritol and Viagra supplies get low... 
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Stuart Racing
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posted November 28, 2006 06:31 AM
True.I'll just bust the tire loose and drive right through the flat spot...LOL..That otta work huh..
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aliveagain
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posted November 28, 2006 08:46 AM
When I ride to work(as much as possible),I have to do alot of city stop and go.I also have been having a problem with idle, only fouling out the plugs.Mine is probably a mapping problem but am interested if you find something else.
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VincentHill
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posted November 28, 2006 09:04 AM
I think it is prounced Sip Pa Tee
Orf you can get a Pipe that does not do these things!! Like what Brock has and tunes
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entropy
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posted November 28, 2006 09:29 AM
quote:
I think it is prounced Symp Pa Tee
Orf you can get a Pipe that does not do these things!! Like what Brock has and tunes
VH,
why should i give shiphteey sympathy?
at his weight he goes 2X fast as me with 1/2 the hp!
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supra5677
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posted November 28, 2006 01:19 PM
DO NOT ADVANCE TIMING VIA THE PC3R. the bike doesnt like it. Use the ignition advance rotor to advance timing, it works way better. Advancing with the pc3r doesnt do sh**
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dougmeyer
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posted November 28, 2006 01:51 PM
Edited By: dougmeyer on 28 Nov 2006 13:52
Stuart Race,
What year is your bike?
That flat spot can absolutely be tuned out of a 2000/2001. I'll be happy to send my map to anyone who wants it.
Supra, What the hell you talkin' man? Advance is advance no matter whether you move the trigger or adjust the map.
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Y2KZX12R
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posted November 28, 2006 02:43 PM
I have an R and have the timning at +4. Its worth 3-4 HP almost everywhere.
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Stuart Racing
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posted November 28, 2006 02:44 PM
Hey Doug, Gladly take any info ya got...I have a 2002, 1900 miles on it...The guy gave me all receipts that you guys gave him...One has the PC111R,, with a map # on it...(MZ204-311-02A),mean anything to you???The prev. owners name was Barrett Holder from N.C...Bought alot of stuff from y'all......
Thanks,
Paul......
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VincentHill
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posted November 28, 2006 03:04 PM
NOW you are getting somewhere! We ALL would like to see someone with the Flat Spot removed. Let us know how much better it is when installed.
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Stuart Racing
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posted November 28, 2006 03:56 PM
quote:
I think it is prounced Sip Pa Tee
Orf you can get a Pipe that does not do these things!! Like what Brock has and tunes
So do you have Brocks stuff and don't have the flat spot or is this just (as advertised) info...I put some K&N's in today ,still got the SPOT......BUT smoother through the whole RPM range and stonger....V.H. hope to get some info we can ALL use...
Paul.....
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aliveagain
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posted November 28, 2006 05:04 PM
VH I thought it was pronounced shifty.
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entropy
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posted November 28, 2006 08:27 PM
quote:
DO NOT ADVANCE TIMING VIA THE PC3R. the bike doesnt like it. Use the ignition advance rotor to advance timing, it works way better. Advancing with the pc3r doesnt do sh**
supra,
maybe yr PC3r is faulty???
2 years ago i did multiple pulls on JohnnyCheese's DJ250 trying all sorts of ign timing variations and like Y2K said, 5's on the PC3R was worth 3-4 hp.
Two weeks ago on a FactoryPro dyno Andy did tests at 0, 5, 7 and got the same gains with 5's that JC did 2 years ago.
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VincentHill
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posted November 29, 2006 02:18 AM
What I am referring to is the Pipe Brock Has is made by Hindle and even though the Basic Configuration is the same (4-2-1 step tubes) the Lengths of the primaries and the divider plate are totally different and I have "ZERO" Flat Spot and as a matter of fact I have an increase in torque and HP between 2,000 and 5,000 over the Akrapovich I had. The bike wants to wheelie over bumps at 2,500. WHen sitting still and you turn the throttle and try to hold 2,500 the engine will try to race to 3,500 like a mini Power band.
If DOug says he has a Map that can remove the Flat Spot then that is exactly what you want. Hopefully the removal will not cost power below and above your flat spot to make it dissapear but actually bring the dip up to the rest of the power curve
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Stuart Racing
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posted November 29, 2006 02:46 PM
Aaaahhh, I got what your saying...I like the thought of a MINI power band as long as it's managable,it's not right now.....
We'll see what transpires when I get the Map...Thanks for the input Vincent...
Paul......
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