jerry coomer
Novice Class
Posts: 43
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posted September 21, 2006 03:55 AM
zx12. 137mph in 1/8
my home made zx12 turbo went 137 mph last night but it wont 60ft. et 5.82@137 but 60ft avrage1.60. im leaving at 9500 and dropping clutch lever also its showing 5psi boost @ launch.i have multi stage i have 2.270 stack height all heavy duty static springs with .075 shims under each spring. but i have .060hole drilled in mtc clutch puller and alot of holes drilled in inner hub it gets all plates good and wet with oil. on all of my other bikes i had same set up and 60 was great .could this oil be causing clutch to lightly slip?also i have bike geared short it has 16-46 it is high in 4th crossing 1/8 finish line. also i have 30# on front of bike and bike is 65'' long with shootout tire. ????????
  
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NOX
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
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posted September 21, 2006 05:18 AM
is is bogging? You have not given a bunch of info here..........
tire spin?
if you are already in 4th, not sure you will get to the finish line with that hp..............
all that oil on the clutch is not doing any good with a multi, that is the point of the multi, to slip........., hell, pro stock bike pluggs all the oil from the clutch.............
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jerry coomer
Novice Class
Posts: 43
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posted September 21, 2006 02:57 PM
no it is not bogging . im leaving at 9500. also tire is not spinning.but it will bog if i leave to low . also it has 2 teeth down in front. i realize if clutch has no oil it wouldnt take as much static to couple. but wouldnt it smoke clutches really quick? i realize it might have to much oil. it has muzzy modified inner hub and all the muzzy modded parts for inner hub such as bearing race with hole drilled in it. that lets oil sling out from behind nut and washer that holds hub on. also i drilled at least 12-15 more holes in inner hub. also on mtc clutch puller i drilled .060 hole. i always had plenty of oil on my other bikes and they liked it 60 was great and so was clutch wear. thanks jc.
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01zx12r
Expert Class
Posts: 338
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posted September 21, 2006 04:41 PM
Idea...
A few options for ya...
Lower Static pressure or take some weight off the fingers.... At 9500 the lockup is trying to come on. I would guess you have to much static pressure.
Monitor clutch slippage with a data logger. I have a few for sale 
I run a lockup (multi mtc) on my (1427) 1320 with a best 60ft of 1.37 or so. Im also 215 without gear. I leave pretty much on the juice as well. email azx12rush@aol.com if you wana chat. Thanks, Chris
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Lovett Racing/Pedigo Performance
8.40 @170
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jerry coomer
Novice Class
Posts: 43
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posted September 21, 2006 04:55 PM
thanks for your help but lock up cant come in no matter what rpm im at . it is centrificly activated by spining of input shaft which dosent spin till wheel does.
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CrotchRocket
Moderator
Bracket Racing with Betsy
Posts: 8038
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posted September 21, 2006 06:32 PM
Jerry with 16-46 gearing you should be in 5th...
What brand clutch springs do you have in there?
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NOX
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
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posted September 21, 2006 08:12 PM
He was talking about 1/8 mile...........
and yeah, how the hell can the lock up come in with the bike sitting still..........WTF?
____________
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2010 TMRC Super Street Points Champion
2010 PMRA Super Street #3 Points
2009 PMRA Super Street Points Runner-Up
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01zx12r
Expert Class
Posts: 338
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posted September 25, 2006 05:21 PM
Excuse me?
Maybe you should watch the fingers on the clutch as you rev the engine!! They will engage with engine rpm and no wheel speed. Dont you feel the clutch try to pull out of your hand as you increase rpm? WTF?
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Lovett Racing/Pedigo Performance
8.40 @170
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ninja12
Needs a job
Posts: 3310
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posted September 25, 2006 06:44 PM
 Edited By: ninja12 on 25 Sep 2006 19:48
I've heard the wheel speed theory before, but i just got to understand it maybe i can explain now.
1. The basket turns at engine speed not tire speed.
2. the inner hub which is attached to the transmission input shaft does not spin with the clutch pulled and will spin at engine speed when released until something overcome the pressure on the springs...ie Traction.
3. The clutch fiber attach to the Basket (engine speed)and the steel to the hub (input shaft speed).
4. When you start to release the clutch level the springs will start to apply pressure to the clutch pressure cap and tries to make the hub spin at the same speed as the basket, it starts spinning and slipping (think of clutch pulling off from a light),
the more you release to closer the hub gets to engine speed.
5. The pressure cap is attached to the hub(input shaft).
6. The lock-up is attached to the pressure cap ,
7. As the basket & clutches spins the steels,hub,input shaft,cap, and lockup it creates centrifical force against the lockup arms to apply more pressue to the cap locking the clutches to withstand more traction.
8. The hub and input shaft engages the output shaft , chain, and rear wheel.
9. Lockup pressure is directly related to the hub/cap speed . When the bike is in gear the hub speed is closely related to wheel speed. This ratio remains constant for a given trans gear and sprockets combo.
10. The more weight on the arm the more pressure for any given hub speed.
11. Since wheel speed is directly related to hub & lock-up speed, many people say the lockup is related to wheel speed.
Since the lock-up will apply it's pressure in NETURAL this is not totally true.
Lock-up is related to hub speed!
12. Clear as mud, huh?
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NOX
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
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posted September 25, 2006 09:11 PM
But, if you try to tune it that way, it will screw you up........
The weights do not "lock in" until about 30 to 60 feet on a single stage.................
If it locks up before that, it is tuned wrong.........
the whole reason for it is the slip at the hit.............
____________
42 Wins
21 Runner-ups
2010 TMRC Super Street Points Champion
2010 PMRA Super Street #3 Points
2009 PMRA Super Street Points Runner-Up
6 Time Centerville Dragway Points Champion
Sponsored by:
Scorpion Helmets
Galfer Braking
AMSOIL
Steve's Speed Shop
Kawasaki Sports Center
Mickey Thompson Tires
Catalyst Racing Composites
Conway Cycle
Syed Leathers
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ninja12
Needs a job
Posts: 3310
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posted September 25, 2006 09:47 PM
The springs have to be strong enough to get the hub to spin in order for the lockup to work.
That first 30-60 feet would be controlled by static spring pressure.
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Steve Jester
Parking Attendant
Posts: 8
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posted September 30, 2006 07:12 PM
I leave on 11 psi I have a busa not sure if this matters
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bugnutt
Parking Attendant
Posts: 18
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posted October 05, 2006 05:24 PM
Hey jerry fellow zx12 owner here having clutch problems wanting to know what size holes you drilled in the hub and where. also where to drill the .060 hole in the clutch puller and how you drilled it because i believe that metal in those spots are very hard? Have muzzy kit on the way trying to get it right on the first try budget racer thanks in advance for all info!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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NINJA12
Needs a job
Posts: 3310
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posted October 05, 2006 08:43 PM
what year 12? crotch rocket has a recipe that some seem to like for loner clutch life.
do a search or pm him.
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ZXLNT
Needs a job
Kawpuke Extraordinare
Posts: 2853
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posted October 06, 2006 02:18 AM
Bugnutt, EDM will make the hole or possibly a stone. Your gonna have hell trying to drill it with a metal bit since its hardened..
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rac4it
Needs a job
Bergie
Posts: 3009
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posted October 06, 2006 03:28 AM
Smokin' trap speeds dude.
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bugnutt
Parking Attendant
Posts: 18
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posted October 06, 2006 05:29 AM
i have an o2 ninja 12 and i'm also 258lbs i'm one of the big boys!
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bugnutt
Parking Attendant
Posts: 18
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posted October 06, 2006 05:33 AM
My bike also has the 1290 kit she dynoed 197 on pump gas! but can't keep clutches in it
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bugnutt
Parking Attendant
Posts: 18
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posted October 06, 2006 05:36 AM
Also has anyone used schnitz's hyperplates any performance gains or durability or help keeping clutch cooler?
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jerry coomer
Novice Class
Posts: 43
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posted October 09, 2006 05:42 PM
bugnutt call and ill tell 502 447 1430
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