fastestr1
Expert Class
Posts: 300
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posted March 18, 2003 05:16 PM
Foot shifting
Why does an air shifter not shift if the tire is spinning but you can foot shift it by burping the gas? Both take a load off the motor.
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Black 02, 8.99 @ 161.95 motor on NOS
Put one knee down for the curves and both knees down for GOD
  
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RedBull
Expert Class
Posts: 406
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posted March 18, 2003 05:51 PM
Foot shifting works for me,
My brothers 7 second gixxer did that,
until he started shifting with nitrous...
It gave the shifter full preasure on every shift,
and didn't have to be filled after every pass.
Red, *<(:{)-
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kingzx12r
Expert Class
woo hoo
Posts: 223
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posted March 18, 2003 08:57 PM
Works for me too, had to much trouble with the air shifter and not enough time to sort it out.
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It ain't easy being me.
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fastestr1
Expert Class
Posts: 300
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posted March 18, 2003 09:12 PM
New e mail and you get around  I have never had a air shifter so I don't know that much about it. I do know the faster guys at the track have them.
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Black 02, 8.99 @ 161.95 motor on NOS
Put one knee down for the curves and both knees down for GOD
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TurboBlew
Moderator
BUSY DOING THE SCHIAVO
Posts: 4590
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posted March 19, 2003 03:46 AM
An airshifter would only help me on the 1-2 shift. Luckily on the Zx12 you dont really need an airshifter to go faster.
You can try fliping the shift mechanism and putting in a washer to get a "GP" shift pattern. (1up, 5 down) Works really well, once you get used to the pattern.
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hotrodninja
Expert Class
Posts: 121
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posted March 19, 2003 06:10 AM
The shifter will work when the tire is spinning, just not as well. I think on occasion it causes missed shifts because the loads are different. It's just as likely due to being on the rev limiter, which will not give the proper unloading of the tranny. Big reason I use an air shifter is the 1-2 shift. On occasion, it can be difficult to get the foot placed in time, causing the shift to be inconsistant. I'd start with my left foot on the shifter to help this. Also it results in less wear on the clutch (unless your just blipping the throttle) A shifter with shift light is more consistant, and allows me to MAKE MORE MONEY!
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Be consistent, win money.
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BA
Pro
Posts: 1592
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posted March 19, 2003 03:08 PM
"Why does an air shifter not shift if the tire is spinning but you can foot shift it by burping the gas? Both take a load off the motor"
I think it's because of the load on the transmission gears & clutch is still there. Don't think about the motor so much, think about the clutch and transmission loads.
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kcadby
Pro
Posts: 1733
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posted March 19, 2003 05:33 PM
BA got it closser than anyone else did  
The kill time on air shifters isn't long enough to let the tire stop spinning AND unload the tranny...
Air shifters many times won't shift if the clucth is slipping for the same reason...NOT ENOUGH KILL TIME for the clucth to stop slipping AND unload the tranny
In case anyone is wondering...the "washer" that TB is talking about goes on the shifter pivot bolt so the linkage clears the shifter when you flip the lever on the motor over...
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fastestr1
Expert Class
Posts: 300
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posted March 19, 2003 06:03 PM
Well i ordered my air shifter today and hope everything works out. I need all the help on the track I can get because I am the only stock motored 12 racing in Hawaii  $$$$
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Black 02, 8.99 @ 161.95 motor on NOS
Put one knee down for the curves and both knees down for GOD
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fastestr1
Expert Class
Posts: 300
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posted March 19, 2003 06:27 PM
What is the prefered methed of mounting stright up or lowing down? I like the schnitzs one that is hook to the shirter rod
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Black 02, 8.99 @ 161.95 motor on NOS
Put one knee down for the curves and both knees down for GOD
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kcadby
Pro
Posts: 1733
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posted March 20, 2003 12:31 PM
They both work...
You DO need more air (or whatever you are useing) if you use it on the rod because it has less leverage on the shift-linkage
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fastestr1
Expert Class
Posts: 300
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posted March 20, 2003 12:52 PM
 Edited By: fastestr1 on 20 Mar 2003 17:09
I did not know you could adjust the presure, how do I do that? So is it better to mount it vert and hook it to the shifter instead of the rod?
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Black 02, 8.99 @ 161.95 motor on NOS
Put one knee down for the curves and both knees down for GOD
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kcadby
Pro
Posts: 1733
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posted March 21, 2003 03:53 PM
As above...it works good either way you mount it...
It's up to you if you want the cylinder upright were everyone can see it (easily)...It might be in the way of your foot there also (you can get used to that if you want it there)...
If you have the high pressure shifter (NO2, CO2, nitrogen) it will have a pressure regulator that you can "add a washer" to raise the spring/air pressure...
Doug at Spencer Cycle posted a while back that they were in the process a making an ADJUSTABLE regulator...DON'T know if has them ready yet...
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fastestr1
Expert Class
Posts: 300
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posted March 21, 2003 11:23 PM
How do you now what presure to set the regulator at?
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Black 02, 8.99 @ 161.95 motor on NOS
Put one knee down for the curves and both knees down for GOD
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kcadby
Pro
Posts: 1733
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posted March 22, 2003 11:40 AM
A guage???
I was on Doug"s site (Spencer Cycle.com) and saw a picture of the Reg. so...I guess he has them now...
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fastestr1
Expert Class
Posts: 300
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posted March 22, 2003 11:43 AM
Yes with a gauge but a what presure!
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Black 02, 8.99 @ 161.95 motor on NOS
Put one knee down for the curves and both knees down for GOD
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Cowboy
Pro
Posts: 1061
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posted March 22, 2003 02:52 PM
fast,if your ram is attached at the linkage you want at least 140psi.If your mounting ram vertical you want at least 100psi,I suggest 120psi.
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kcadby
Pro
Posts: 1733
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posted March 22, 2003 06:15 PM
I agree with what Cowboy says...
120 for vert...
150 for linkage...
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fastestr1
Expert Class
Posts: 300
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posted March 22, 2003 06:21 PM
Thanks, the only reason I wanted to mount it on the linkes was of no slack. I'm not sure how much distance the rod will pull.
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Black 02, 8.99 @ 161.95 motor on NOS
Put one knee down for the curves and both knees down for GOD
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kcadby
Pro
Posts: 1733
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posted March 22, 2003 06:33 PM
The ones I've installed are all on the linkage...NO problems as long as the pressure is high enough...
If you've never used an air shifter before...best advice I have is to PUSH THE BUTTON LIKE YOU MEAN IT...don't push it "half-assed" or you might end up missing gears sometimes...the bike will jurk when it shifts and if you aren't on the button solid...it might not get into gear all the way before the horn button looses contact...
Push the button and HOLD IT ON until you KNOW it's in the next gear
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fastestr1
Expert Class
Posts: 300
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posted March 23, 2003 09:34 PM
Ok can you have to much presure? Yes I use 140 on the linkage is that ok?
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Black 02, 8.99 @ 161.95 motor on NOS
Put one knee down for the curves and both knees down for GOD
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hotrodninja
Expert Class
Posts: 121
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posted March 25, 2003 05:48 AM
I have an MRE shifter, electric over air, and the air selinoid had a note on it that it should never exceed 125psi. Maybe they're being extra carefull.
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Be consistent, win money.
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MadMike
Moderator
FEAR THE BLACK FLAG!!!!!!!!
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posted March 25, 2003 05:52 AM
I believe, the reason is the air lines are rated at 125psi. but all of my lines are short and I havent had any problem's in two years.
Mad Mike
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200-MPH CLUB MEMBER!
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Cowboy
Pro
Posts: 1061
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posted March 25, 2003 08:25 AM
all of those electric over air solenoids say not to exceed 125psi but they are the same solenoids that come with the high pressure setups that are regulated to 140psi.
Fast,I had the muzzy high pressure that attached to the linkage and was preset at 140 psi.If you start to miss shifts even at 140 psi i would up it to 160 then to a max of 180 which is what i was told they ran on Rickeys shootout bike.
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Cowboy
Pro
Posts: 1061
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posted March 25, 2003 08:27 AM
I am changing things around so the ram mounts vertically and am mounting the solenoid directly to the ram.
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