starchild
Expert Class
Posts: 366
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posted October 09, 2009 11:34 AM
mtc lock up
hey guys-- looking for some advice on an adjustment or tune on a 2 stage lock up. first of all i've had two crashes where the bike has come up on me. common denominator--lock up in both times.now i've never use the shims and i never removed weight from the arms. removing weight from the arms can help in what way? regarding keeping the bike down and helping my 60ft. all help and advice is appreciated as always.
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jay
  
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kawasakijockey
Pro
Posts: 1876
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posted October 09, 2009 11:44 AM
On 2 stage lockups you have to determine how you want the clutch to work, by hand holding the clutch or throwaway of the lever. Which are you trying to do?
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Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
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SteddyTeddy
Pro
Posts: 1664
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posted October 09, 2009 11:56 AM
You flipped over backwards twice or just lost it slamming back down? 
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starchild
Expert Class
Posts: 366
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posted October 09, 2009 12:05 PM
one flip one slam------throwaway i've always dump the clutch but i have not always use the lock up
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jay
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kawasakijockey
Pro
Posts: 1876
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posted October 09, 2009 12:24 PM
If you are 15-20ft or more down track then it means the arms are heavy. If it is happening as soon as you throw the clutch you have too much static spring. What is your gearing? There will be questions you have to answer so be ready.
Steddy has very good advice on these single stages.
____________
Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
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starchild
Expert Class
Posts: 366
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posted October 09, 2009 12:27 PM
this is happening early i'd say less than 30ft---gearing is 16-44
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jay
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kawasakijockey
Pro
Posts: 1876
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posted October 09, 2009 12:33 PM
It is more than likely weight on the arms. What springs do you have?
____________
Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
|
starchild
Expert Class
Posts: 366
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posted October 09, 2009 12:35 PM
stock springs and no washers
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jay
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kawasakijockey
Pro
Posts: 1876
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posted October 09, 2009 12:43 PM
Wow. That seems like a lot of static for a throwaway if you are going wide open on the lever drop. What is your weight, wheelbase, and are you going wide open at the hit and what rpm?
____________
Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
|
starchild
Expert Class
Posts: 366
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posted October 09, 2009 12:47 PM
well i'm launching at 4-4500-5000rpm --i'm @185lbs--wb is 64 --wide open at the hit
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jay
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starchild
Expert Class
Posts: 366
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posted October 09, 2009 12:52 PM
i dont want to forget this second crash i left at 6000rpm --1st crash slightly more track was sticky and i bogged at less than 6000rpm
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jay
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kawasakijockey
Pro
Posts: 1876
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posted October 09, 2009 01:00 PM
Do you have shock spring and compression set up tight? With that gearing it will wheelie easily if the shock bottoms out. If your suspension is set up right you can take all the weight off the arms and try it. The stock springs lose about 50-60 lbs total static because of the recess in the MTC lockup. Bare arms should hold it on stock motor. Without the weight check your mph and if it is lower than normal then it will need weight back on, just not as much. You might even have to back off the gearing to make it work right or lengthen the wheelbase.
____________
Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
|
kawasakijockey
Pro
Posts: 1876
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posted October 09, 2009 01:05 PM
quote:
i dont want to forget this second crash i left at 6000rpm --1st crash slightly more track was sticky and i bogged at less than 6000rpm
I was typing when you posted this. If you are bogging off the line you have too much static. MTC has the blue super soft springs. If I were you I would try these first and shim them to where the bike still leaves hard but doesnt wheelie or bog at the hit. A lighter spring will make it to where the lockup isnt so aggresive 15 or so feet down track. It is a balancing act with a single stage to make it even get in the ballpark.
____________
Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
|
starchild
Expert Class
Posts: 366
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posted October 09, 2009 01:12 PM
i'll take that advice and grab those springs---my suspension is definitely something i will look at also. i 've had issues bottoming out too
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jay
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starchild
Expert Class
Posts: 366
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posted October 09, 2009 01:14 PM
thanks for the help and advice i now have a good direction to begin
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jay
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kawasakijockey
Pro
Posts: 1876
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posted October 09, 2009 01:26 PM
It is not simple to troubleshoot while not seeing or talking about what the bike is doing. If you are leaving at 5000-6000 rpm and going wide open, the bike should never drop below 6-7000 rpm if the springs are shimmed right. It should snap off the line and roll about 15 ft where the lockup arms start applying a graduating pressure with every rpm gain in rear wheel speed. If your spring pressure is high the lockup arms dont have to apply much at all to either bog the engine or send it into a wheelie.
Personally, I am having rear shock issues with mine and it is holding me back. It wheelies at the 20-30 ft mark. Bottoming out. I am waiting on a Busa spring to fix it.
____________
Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
|
starchild
Expert Class
Posts: 366
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posted October 09, 2009 01:45 PM
i've been hearing about that fix-- how much are they asking for that shock?
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jay
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kawasakijockey
Pro
Posts: 1876
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posted October 09, 2009 01:48 PM
You can used ones between 50- 90 bucks.
____________
Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
|
starchild
Expert Class
Posts: 366
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posted October 09, 2009 01:51 PM
thanks again for all your help
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jay
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kawasakijockey
Pro
Posts: 1876
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posted October 09, 2009 01:54 PM
No problem. Steddy gave me a lot of useful info and I dont mind sharing it and what I have learned tinkering with mine and a couple of other guys' bikes.
____________
Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
|
KZScott
Needs a life
high on speed
Posts: 7235
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posted October 09, 2009 02:26 PM
the mtc is a very agressive clutch(in the 12 anyway) . im running around half the static spring pressure of oem, and you will need to take all the weight off the arms, and possibly machine then down lighter as you cant take any off (5 spring, 5 arm design limits the amount of adjustment you can make without doing machining or getting a bunch of different springs)
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kawasakijockey
Pro
Posts: 1876
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posted October 09, 2009 02:37 PM
Oh no! Scott has done let it out now. We were gonna fill him in on that later on..after he tried the basic stuff first.
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Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
|
SteddyTeddy
Pro
Posts: 1664
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posted October 09, 2009 03:39 PM
How long you been running at the strip?
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bigwil
Expert Class
06 zx 14 turbo stage 3
Posts: 423
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posted October 09, 2009 03:48 PM
im running schnitz heavy duty springs and bolts only on 3 arms no weights if your motor is stock you prob. dont need any bolts its not lk my 12 was the 14 likes o lot of static presure control right of the line im shure all the weight on the arms hit 15 ft out it sliped when he droped the clutch cuz needs more static than wam lock up kicked in ,IMO get rid of the weight on the arms and add the shims to the springs or get stiffer springs
ps control the bike with your left hand it should never climb that high
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bigwil// going fast aint easy so turbo it
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bigwil
Expert Class
06 zx 14 turbo stage 3
Posts: 423
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posted October 09, 2009 03:55 PM
i just got a litz revalve shock with a 08 busa spring works great dont hit any more squats nice comes up nice and slow
____________
bigwil// going fast aint easy so turbo it
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