Table of Contents

What is Slide piece

Here, we call it Slide Piece (SP), it can also be called a Slider, Damper, or Shoe for Driving Pulley. As for appearance, its color will be various but with almost similar shapes, no big difference.

Slide Piece AM, SP-AM, for Dr.Pulley Variator

Slide Piece AE, SP-AE, BMW C Sport 600/650 (→2015), BMW C GT 650 (→2015) — Slide Piece AM, SP-AM, for Dr.Pulley Variator

Where is its installing position?

Installed in the CVT housing
In the Driving Pulley
between the Ramp Plate and Variator

How to operate

The Slide Piece is installed in the Ramp Plate becomes a whole part, and slides UP and DOWN on the guide post of the Variator.

what is slide piece - basic introduction

What is its function

Buffer
Shock absorption
Reduce abnormal sound
Increase the life of the drive pulley
Rotational force transmitted

Slide Piece is a consuming item

Firstly, the Slide Piece is a consuming item that needs to be replaced regularly. The condition of scooters are different, and there is no guarantee that it must be replaced for a predetermined kilometers of riding. Therefore, it is advisable to check the Slide Piece after a period of riding or when there is an unusual situation.

What happens if the Slide Pieces is worn out?

Vibration, Abnormal noise, Fuel consumption higher

If you insist do not replace

The mild case will be Driving pulley damage or a serious case of damage to a complete CVT system

What is slide piece - serious case of damage to a complete CVT system

Inspection of Ramp Plate and Slide Piece

Installed Slide Piece on the ramp plate, inspections include clearance, shaking, and loose falling easily.

For example, as this variator, the Slide Piece is loose falling easily, replacement is needed

Most of the Slide Piece installed port on the ramp plate is designed outer portion is a little narrower than its inside port for preventing the loosing falling.

What is slide piece - Inspection of Ramp Plate and Slide Piece

Inspection of Variator and Ramp Plate with SP installed

After the Slide Piece is installed on the Ramp Plate, checking the sliding behavior between Slide Piece and guide post whether is smooth enough and without any interference.

Usually, the clearance becomes larger when the Slide Piece rises to a higher point and narrower at lower position.

Generally speaking, the two slopes surface of Slide Piece are the main contacting portion, while the bottom is rarely used.

In addition, check the surface on the guide post and touch the friction surface with your hands to see if there is any obvious unevenness. If so, the Variator hould be replaced a new one.

There are some guide post (rib) seriously worn, Let me show you.

what is slide piece - Guide Post seriously worn

Replacement of Slide Piece

The checking procedure is finished and it’s time for replacing a new one. The product code of Dr.Pulley Slide Piece is SP-G.

Step 1

Installing the Slide Piece on the Ramp Plate, it’s normal if you feel a little resistance, sometimes you need a little more force to install it.

In addition, there’s no direction distinction sometimes in an Slide Piece (SP-G) such as this set as an example, it is applicable to assemble it both from the front and backside.

What is slide piece - Installing the Slide Piece on the Ramp Plate

Step2

We should put the Rollers in Before Put the Ramp Plate with Slide Piece installed into the moveable Variator, and then try it to move up and down to make sure the movement is smooth and acceptable.