Are there different multistage springs available from MTC?

Yes, in addition to the multistage springs included with your lockup kit MTC offers 3 other multistage springs. They are #15, #18, and #21 and are available for purchase.

Order MSC-LKS107 which contains 3 spring of each type listed above.

Can I adjust the set screws on the top of the multistage to set my arm clearance?

In short, no. Those screws are preset at MTC to have the correct alignment and preload on the counter springs. Altering their position will cause the lockup to function erratically or possibly not at all.

I changed the set screw positions on my multistage, how do I fix it?

The first thing to do is to remove the screw completely and clean the threads and screws with brake cleaner. You will then want to apply some thread locker to the screw and reinstall it. You should adjust the screw until the bottom edge of the arm is parallel with the bottom surface of the lockup unit.

Can I get a Multistage lockup set up for my turbo'd Hayabusa?

Certainly! We can build your lockup with one of our turbo baselines if you provide us with the HP rating and wheelbase of your Hayabusa at the time of order. If you’ve already purchased a lockup with our standard baseline, contact us and we will gladly give you the information you need.

 

Do I need an air shifter to run a lockup clutch?

Yes, while you should be able to shift the bike normally at lower RPM (under 5K) once the lockup engages fully you will need to use an air or electric shifter. Trying to pull the clutch lever in at high speed or high RPM could result in damage to the clutch system.

 

How much clearance is needed between the lockup arms and the pressure plate buttons?

MTC recommends there be .100-.125″ clearance between the flat surface of the arms and the hardened steel buttons in the pressure plate.

Having too little clearance can result in the arms not  be able to swing out far enough to generate sufficient leverage to lock the clutch up.

Too much clearance especially on a multistage lockup results in the arm reaching its travel limit before applying enough force to lock up the clutch pack.

The .125″ max is not as critical on the 2-stage lockup since these arms are capable of more travel than the multistage. In order to measure this clearance on a two stage lockup you will have to hold the arm in position.

I changed the set screw positions on my multistage, how do I fix it?

The first thing to do is to remove the screw completely and clean the threads and screws with brake cleaner. You will then want to apply some thread locker to the screw and reinstall it. You should adjust the screw until the bottom edge of the arm is parallel with the bottom surface of the lockup unit.

Isn't adding weight to the arms the same as changing the dynamic springs?

No, adding weight to the arms steepens the curve of clamping force. If the weight remains the same changing the springs will move the curve higher or lower in the RPM band however the clamping slope will remain the same. This is one of the reasons we recommend keeping the weight the same on each arm. If you are just trying to change the RPM of the arm application do it with the springs. The need for more clamping force would be dealt with by adding weight.

 

My bike is too aggressive at launch, what should I do?

If your bike is too aggressive, then you need to reduce the amount of static spring pressure. If you have shimmed the springs, then you need to remove some of them to reduce the pressure. If your springs are not shimmed then you need to get some softer springs. The launch of a lockup equipped bike is totally controlled by the clutch springs. Your lockup does not start to apply until the bike is in motion, usually about 10-20ft off the line depending on the type of lockup you have. MTC stocks softer clutch springs for a number of applications, so give us a call.

 

My bike is too lazy at launch, what's wrong?

If your bike is lazy or is driving through the clutch at launch, then hooking up about 20 feet off the line, you need to increase your static spring pressure. You need to add shims to the tops of the clutch springs. We suggest putting the shims on the top so they can easily accessed if you need to lower the spring pressure. As a general rule, the .025″ shims will add 1-2 pounds of pressure per shim per spring. The .050″ shims add between 2 and 3 pounds of spring pressure per shim per spring.

What will happen if I pull the clutch lever at high speed/RPM?

You should avoid this if at all possible, if the lockup is fully engaged you may not be able to pull the clutch lever and attempting to do so could damage internal clutch system parts. This is especially true on the Kawasaki ZX-10 and ZX-12 due to the way the clutch is operated.