How to Upgrade a Peugeot Speedfight 2

The Peugeot Speedfight 2 is a moped that has a sporty engine, progressive braking, combined with a single arm fork to guarantee excellent road holding.  The asymmetrical twin lens headlight enables the driver to see and be seen.   The Speedfight handles and stops very well. The two-stroke motor has some real get up and go but upgrading it can add to that.

The first thing most frequently done to upgrade the Peugeot Speedfight 2 is to de-restrict it.  When this scooter is built, it is set for 31 miles per hour. De-restricting removes the restricts that keep the speed down.  This is legal, except for riders who are 16 years old or younger.  De-restricted it should run at 48 miles per hour, sometimes higher.

De-restriction consists of the following on that scooter:

1. Remove the restrictor ring from the exhaust.


2. Remove the restrictor washer removed from the variator.
   The variator is located under the ignition cover, which is held in place with three to six bolts.  The variator is held in place with one bolt.


3. Grind down the variator sleeve 1mm in length.


4. Replace the clutch springs with red colored springs.


5. Replace the stock rollers in the variator with lighter weighted rollers, usually 4.2g each.


6. Remove the restrictor bushing from the intake manifold.
   This is between the engine and carburettor


7. Replace the stock jets with ones that are three sizes larger

Replace stock parts
Another idea for upgrading is to replace stock components with aftermarket ones for the exhaust, air filter and variator.  The purchase a good set of high-end tires.

Alter variator pipe
There is a small pipe joined to the exhaust that has a sealed end.  This pipe is approximately 150mm long and 20mm wide.   This pipe interrupts the back pressure in the exhaust expansion chamber, causing a restriction; flattening it will stop this.

To alter the pipe, do the following:

1. Remove the pipe from the exhaust.


2. Put this pipe in a vices or hammer it flat, up to 20mm from where it joins the exhaust.


3. Reattach the pipe to the exhaust.

 Whatever changes you make, go for a test ride to assure the modifications work properly.