Torsion Controller

[bumslayer]

Here's something that scooter owners in my country are putting into their GY6 machines.





This little wonder will decrease vibration and stabilize transmission operation at any RPM and temperature. During the automatic CVT power curve, the bushing of the torque driver makes a small rotation, giving torsion to the contrasting spring. Sometimes the spring will bind (because it is metal on metal) or remain stuck in its position causing some un-wanted forces (jerking and/or bucking). Also, the centrifugal forces caused at high rpm causes the spring to buckle and veer, which can create a big vibration, very annoying for the driver as well as harmful to the engine and, above all, making for an unsteady power curve and loss of power.

Malossi is selling a similar item, minus the ball bearings, in contrast to this item. And although the item pictured above is supposed to be used for a Honda DIO engine, it would fit any GY6 engine like a glove with no problem at all. To install, you have to remove the spring guide of your torque driver sheave. You may also have to install heavier roller weights to compensate the spring tension once the torsion controller is in place.

[earlwb]

Interesting.
We still need to get someone to try it with and without the torsion controller to see if they notice any difference or not.
Since it spaces the torque spring a little tighter, I would assume one might have to go to a little weaker torque spring.
I am not sure that one could tell the difference with it on or not.
Let us know how it goes.
Take some pics of the installation process. Lots of beginners would find it fascinating too.

[bumslayer]

Sure. I'll be installing mine as soon as I get heavier rollers for my scooter. I'll let you know how it feels after I testing.

[loudest143]

Malossi offers this as their torsion controller.



Here at LoudestLabs, we have designed our own, and will report on it's release, cost, and availability...



Available at Lowes.com, or your local Lowes for $1.32 American. Check for local availability. Located in the electrical department in various sizes for that perfect fit.

Loudest143
*caffeine affects me weird

[bumslayer]

Here's an update on my torsion controller.

After much grunting and cursing, I was able to remove and disassemble the clutch and torque drive using my home-made Y-tool. I removed the OEM spring guide and installed the torsion controller. It fit the torque drive perfectly. I greased the grooves of the torsion controller, put the ball bearings in, reassembled the CVT and went for a test drive.

One thing I noticed is that the scooter runs smoother and the vibes have been significantly reduced. I needed to open my throttle a little bit more to get the scooter going due to the increased load on the contra spring. I also noticed that the dragging I usually have when accelerating from full stop have disappeared. There's no noticeable loss or gain in mid to full throttle position.

My co-riders tell me that the torsion controller works best if my belt size is 835-20-30. I am now in the process of acquiring a shorter belt as soon as funds become available.

If you have questions, feel free to ask me.