Index

Overview

Tuning

Tuning Overview

Lighter Roller Weights

Remove Variator Restrictor

Stiffer Clutch Springs

Move Needle Jet Washer

Increase Fuel Jet Size

Carb De-restriction

Un-Restricted CDI Unit

Un-Restricted Air Inlet

Trouble Shooting

Compression Test

Fuel Enricher Test

Seized Brake Caliper

General Maintenance

Replace Air Filter

Check & Change Oil

Spark Plug Change

Idle Speed Adjust

Change Brake Pads

Adjust Valve Lash

Electrical

Testing the Battery & Charging System

Battery Change

Coil Change

HT Lead Change

Transmission

Remove Starter Motor

Refurb Bendix Gear

Engine

Camshaft Removal

Valve Removal

Replace Valve Guides

Engine Removal



Return to Transport Listings

Models Covered

Lexmoto, Pulse, Sukida, Baotion, Lifan, Direct Bikes, Huatian, JMStar, QT50, LF50QT, YH50QT, BT49qt, 139 QMB, Honda, GY6, Motorbike, Taishan, Jonway, Peugeot V-Clic, QT-4, QT-7, QT-9, qt-11, QT-50 Kymco, Tank, Quinqzi, PGO, Roketa, Strada, Vento, Yamati, QMB139, SunL, SYM, QingQi, Volano Plus Many More Chinese Motorcycles, mopeds and scooters!



Variator Restrictor

Imported scooter and motorcycle manufacturers use a variety of methods to restrict your chinese import GY6 clone scooter to less than 30mph. One method that is sometimes used is to put a spacer between the two cones in the variator that stops them from closing fully. This has the effect of stopping the scooter from reaching top gear, therefore limiting top speed.

Steps to Remove the Restrictor from the Variator

Applies to: Baotian, Sukida, Hoatian, Lifan, JMStar, Jinlun, Kymco, Tank, Quinqzi, PGO, Roketa, Strada and Taishan QingQi and many more...

Removing the Variator Speed Limiter

To remove the variator restrictor from your imported 50c chinese scooter you will have to gain access to the transmission. This is not too difficult but you may find it hard to undo the nut holding the variator onto the crankshaft. Ideally, you would use an impact wrench to undo the nut. If you do not have an impact wrench, you may be able to undo the nut by getting an assistant to hold on the back brake.

If you suspect that your chinese scooter is not reaching its maximum gear ratio then follow these steps to see if a restrictor is fitted to your cvt.


  1. Remove the Kick Start Lever.
  2. Undo the bolts that secure the transmission cover to your 50cc 4 stroke scooters engine.

    Removing the Transmission Cover from your GY6 Chinese Scooter 4 Stroke
  3. Once the bolts have been removed, you may find that you have to use a lever to prise the cover from the engine. NOTE: Make sure you have removed ALL the bolts and any other obstructions before applying any force to the lever!

    Using a Breaker Bar to Lever Off the Transmission Cover from your GY6 Chinese Scooter Clone
  4. You should now be able to see the variator assembly. You need to undo the bolt that attaches the variator cones to the crankshaft, ideally using an air wrench.

    Undo the bolt securing the variator to the crankshaft, 139QMB
  5. The outer variator cone should now slide off the scooters crankshaft, if there is a restrictor washer it will stop the two cones from coming completely together. Remove the washer (I do not have a picture!) and then reassemble.










Notes

On reassembly, it can be a bit tricky to get the drive belt back onto your chinese scooters variator.

You will need to force the rear cones open against the pressure of the springs to allow enough slack in the belt.

Make sure you do the crankshaft bolt really tight again, use a Thread Lock type paste to be really sure. You don't want the bolt to come undone on your motorbike.



All Rights Reserved