wannabe
Pro
Posts: 1931
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posted January 15, 2003 03:34 PM
two-stage rev limiter
OK, I never thought I'd get to the point when I wanted one of these things, but can someone recommend a specific two-stage rev limiter for my zx-12? I would very much appreicate a price and source.
Thanks!
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"There are only three sports: bullfighting, motor racing, and mountaineering; the rest are just games." - Ernest Hemingway
  
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cowboy
Pro
Posts: 1061
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posted January 15, 2003 04:37 PM
I believe NLR has one.909-888-8057
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wannabe
Pro
Posts: 1931
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posted January 15, 2003 06:22 PM
Thanks, Cowboy. I'll give them a call...
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"There are only three sports: bullfighting, motor racing, and mountaineering; the rest are just games." - Ernest Hemingway
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wannabe
Pro
Posts: 1931
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posted January 15, 2003 07:52 PM
My buddy recommended one of these instead. Anyone have this on their bike? For $283, I want some recommendations first
DYNA DRL-400
Two Stage Rev Limiter
The Dyna DRL-400 Two Stage Rev Limiter has been specifically designed to maximize launch performance and over-rev protection in drag racing. The DRL-400 allows a precisely controlled launch rpm limit to be set, while also guaranteeing against over-rev damage due to missed shifts or drive train breakage. Selection between the launch limit and the upper over-rev limit is usually made through the use of a clutch lever switch. Both rpm limits are adjustable via two knobs on the DRL-400.
The DRL-400 constantly monitors the engine rpm with great precision and randomly deletes ignition pulses to hold the engine exactly at the desired rpm. The DRL-400 can hold a 270 horsepower engine to a steady launch rpm with less then +/- 50 rpm wavier. Other launch rpm limiters typically make the engine rpm waive through a pounding oscillation. This can be very hard on expensive racing components.
The DRL-400 works with all inductive electronic ignitions on 2 and 4 cylinder engines. It is housed in a 3 3/4" x 2 3/8" x 1" plastic case with integral mounting flanges.
DRL-400 Features:
Accurate launch limiting with 32 different settings
Smooth, non destructive launch limiting
Adjustable high limit between 16 different settings
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cowboy
Pro
Posts: 1061
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posted January 16, 2003 06:52 AM
will that work with stick coils?
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wannabe
Pro
Posts: 1931
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posted January 16, 2003 08:39 AM
I don't know. I'm gonna call tehm today and find out...
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wannabe
Pro
Posts: 1931
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posted January 16, 2003 11:09 AM
I just got a e-mail from Dyna. They told me that they don't make one for the ZX-12. They suggested Schnitz.
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"There are only three sports: bullfighting, motor racing, and mountaineering; the rest are just games." - Ernest Hemingway
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RAC4IT
Needs a job
Bergie
Posts: 3009
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posted January 16, 2003 12:29 PM
Why do you need a 2nd limiter?
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cowboy
Pro
Posts: 1061
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posted January 16, 2003 01:20 PM
Wannabe,have you tried nlr?I don't believe schnitz has one and if they did it would most likely be from nlr.
Rac4it,he is using a slick and bar so the 2 step will make for more consistent launches and tuning.I myself would use the top rev limiter to launch.I have seen this done with good results as long as your not running alot more torque like a 1361.
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wannabe
Pro
Posts: 1931
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posted January 16, 2003 01:33 PM
I haven't been able to get a hold of anyone at NLR. I've tried the number you gave me, but I keep getting an answering machine. I got a hold of someone at Schnitz. They told me that they didn't know anyone who made a two-stage rev limiter for the stock zx-12. The said that the only way they knew to do it right now was through the muzzy ignition.
Bergie, the two stage rev limiter is for consistent launches for the brackets. The first limiter can be set at 9K rpm for the launches, and the second one set for 11.5K after that. I'm told that you typically take the signal from the clutch lever to activate the limiters. When the clutch lever is in, 9k is the limit. When it's out, 11.5K.
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"There are only three sports: bullfighting, motor racing, and mountaineering; the rest are just games." - Ernest Hemingway
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mack
Novice Class
Posts: 60
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posted January 16, 2003 02:06 PM
I have the one from NLR it works great.it is also a digital kill for an air shifter.I got the first one,so we had so teething pains at first with the wiring.Every thing is fine now.Keep trying,I know he makes one for the Busa also.www.NLRsystems.com phone 909-888-8057
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wannabe
Pro
Posts: 1931
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posted January 16, 2003 02:37 PM
Thanks, mack. Their website shows this for $365. I'm still having bad luck trying to get a hold of anyone on the phone. I wonder if they just sell the 2-step without the ignition kill.
NLR Systems
2-Step with Ignition Kill
Available for:
Hayabusa, GSXR-1000, ZX-12, GSXR-750
The 2-Step w/ Ignition Kill has the following features:
Digital technology provides consistent and repeatable performance.
Easy to use 16 position rotary switches simplify setup.
System packaging allows unit programming without removing vehicle seat.
RPM range 4000 to 14,000, adjustable in 100 RPM increments.
Ignition Kill times adjustable from 14ms to 122ms in 7ms increments.
Ignition coil control unit (RCI-1) uses high speed switching design.
Output LED indicates when output is active.
Available for Hayabusa and Kawasaki ZX-12
Wiring harness included.
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"There are only three sports: bullfighting, motor racing, and mountaineering; the rest are just games." - Ernest Hemingway
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RAC4IT
Needs a job
Bergie
Posts: 3009
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posted January 16, 2003 02:43 PM
Cool yeah I forgot you were using a slick and bar; good luck with it this season!
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wannabe
Pro
Posts: 1931
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posted January 16, 2003 02:44 PM
Thanks, Bergie!!!
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"There are only three sports: bullfighting, motor racing, and mountaineering; the rest are just games." - Ernest Hemingway
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wannabe
Pro
Posts: 1931
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posted January 17, 2003 10:13 AM
I e-mailed nlr and asked them if they had the rev limiter by itself available without the ignition kill. Here's their response. I think I'm gonna go ahead and buy it.
quote:
the 2 step stutters the ignition so you have to kill the coils. The
ignition kill is just a benefit feature.
got em in stock
909-888-8057
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"There are only three sports: bullfighting, motor racing, and mountaineering; the rest are just games." - Ernest Hemingway
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cowboy
Pro
Posts: 1061
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posted January 17, 2003 11:29 AM
Wannabe,are you sure you need it?When you get comfortable with your launches you will want to be launching up near the rev limiter anyway.
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wannabe
Pro
Posts: 1931
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posted January 17, 2003 01:14 PM
That's true. I probably should wait, but part of me really wants the guaranteed extra consistency. Plus, it'll be one less thing to think about at the line.
It's a tough call right now.
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"There are only three sports: bullfighting, motor racing, and mountaineering; the rest are just games." - Ernest Hemingway
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DR JOE
Expert Class
Posts: 352
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posted January 17, 2003 01:47 PM
Wannabe How long have you been racing?
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wannabe
Pro
Posts: 1931
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posted January 17, 2003 02:08 PM
This is my first season, Dr. Joe. There are two schools of thought I keep hearing. One says to use as little technology as possible until you get a bunch of experience. The other side says to hook it all up as soon as possible. I'm leaning toward the latter.
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"There are only three sports: bullfighting, motor racing, and mountaineering; the rest are just games." - Ernest Hemingway
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kcadby
Pro
Posts: 1733
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posted January 17, 2003 05:02 PM
I can't imagine needing to launch at that high of RPMs??? (rev limit)
Seems like just above max-torq should be PLENTY high???
If not...then you should use a lock-up that will let the clutch slip some on the launch...
FREEKS me out when I hear a bike reving that high on the starting line...you just don't need to do that...if the bike is set-up right 
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cowboy
Pro
Posts: 1061
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posted January 17, 2003 05:16 PM
Yah,if you want to purchase a multi stage lockup then obviousy you don't have to launch at that high rpm.I've watched it done for 2 years on 2 different bikes with no problems.All its doing is making the clutch slip that little bit to get the bike moving.
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kcadby
Pro
Posts: 1733
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posted January 17, 2003 05:41 PM
yikes...that a lot of revs 
I haven't seen a 12 get that good of traction...yet...
Although I do have video of Coby's SuperBike reving mighty high on the launch
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wannabe
Pro
Posts: 1931
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posted January 17, 2003 10:51 PM
OK, now I'm confused again.
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zx12mark
Pro
Posts: 1654
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posted January 18, 2003 10:08 PM
2 stage
most pro drag racers use the 2 stage limiters on bikes and cars.you guys hear them at the track all the time. just set the studder box for what ever rpm you want to launch at and it is the same every time.all with out looking at the tach. buy a shift lite while your at it also. it will put you in a differant class.you'll have to run in pro bike. go far it.... later....killer
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RedBull
Expert Class
Posts: 406
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posted January 28, 2003 05:14 PM
We need to go to the track !
California Speedway has street legal ...
I don't have a 2 step, although I have left with the shift light on !
Your ZX12 does still have a tach. right ?
It will rev off of idle right ?
Just don't throw all the clutch out at once...
You did put more air in that Mickey right ?
Only change 1 thing at a time...
Red, *<(:{)-
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1998 Prostar West Super Gas top ten.
1999 Prostar West Super Gas Champion !
2000 NMRA / Prostar Pro E/T runner up.
2001, 2002, & 2003 NMRA Pro E/T Champion !
2004 #3, 2005, & 2006 NMRA Pro E/T runner up.
2007 Pro St. Legal #6, NMRA Pro E/T Champion !
2008 Motorcycle Drag Race Assoc. SS Champion !
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Photos by www.HooliganUnderground.com
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