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Benelli 125 2 C

Post by skuttadawg on Dec 17, 2012 GMT -5

125/150cc Performance

139QMB Performance

50cc 2stroke

250cc Performance



139QMB parts

GY6-150cc 157QMJ

1e40QMB JOG Minarelli 2T

TGB R5/R50X/Morini/AD50

Talk with Mo!


Dealer Links


Tech Talk Mo!

Submit your tech to MO! at mailto:tech@scrappydogscooters.com

Proper installation of our sliders ( similar to the Dr. Pulley )

shown in a GY6-150 variator. If are not installed correctly, the variator not function, and speed will be


Hey MO! How do I know what engine I I have heard all this about 1PE40QMB and 157QMJ blah. It seems so darn to get parts for these Chinese

What can you do to help? -Lost in Las

Chinese bikes and ATV’s can be confusing, that is why scrappy was started. There are two identifications to by using this site for not only to know what you but to get what you need. The first is the type. While this uses a simplified directory at the you really need to know the number to get your parts This engine number is in two parts on the same stamp

Most of the time the numbers are on the left side of the engine, the belt cover, near the close to the engine mount to the The bottom number is the reg. the top number is the one to pay attention to, this is the identification number. It tells you you have.

Below is a picture of a plate for a 50cc 4stroke, known as a 139QMB.

The engine is very significant, and reveals Take for example a popular like the Honda Monkey copy) The number stamped on it is a The first number is the number of the second, a P, is code for a horizontal The next 2 numbers, 39, is the bore in mm, 39mm bore.

The next F, indicates that it is natural forced) air-cooled style. The letter designates that it is a engine M. The next letter the full engine displacement. B is for a 50. C for a 60, D for a 70, F for a 90, G for a 100, H for a 110, I for a 125, J for a and so forth.

Notice that the graduation increase is indicated by an in the alphabetical letter? It’s no It’s amazing to me the cooperation in of China. There is also letters on many, designating the like Quinjiang (we have all on file), which stamps acronym, QJ, as the first two letters in code.

It’s also very as the QJ139qmb is quite different the other 139qmb’s. It uses the (2T) transmission components, and the case is a little different. are also suffix numbers at the which designate iteration like -3 in the photo below, denotes that it is the third or improvment.

Call or email us if you any questions. We love to help. is the Chinese engine code with the example of the JOG 2stroke number 1PE40QMB-4

Some have the number plate on the rear side of the belt GY6 engines are on the fron, bottom, had side near the centerstand 2stroke JOG’s are near the wheel like Honda elite and DIO. They are on a sticker on the belt case. the airbox needs to be removed and of grime washed off on the 2strokes.

By law they are stamped on the engine and are there, even if you don’t see it at inspection. Either way it will you significantly to know this. As far as the body parts go, you can reference body appearance to the listing in the Chassis directory given at the or simply click here-

This list is growing so if you don’t see your bike check later, or better yet use the Finder form on the home Scrappy dogs are committed to the Chinese vehicle market and fun for everyone, and affordable too!

for the question, hope your not so anymore.


AC vs DC fired or pulsed CDI SYSTEMS

Hey MO! What’s all this I about AC and DC fired or pulsed — Harried in Henderson

Ok the short answer.

Here is the digest of how a CDI works

In all cases is a magnet that passes a coil and induces a pulse in coil which then is to the CDI and causes the small induced to fire an electronic device are more than 1 type but all happens inside the CDI) discharges the larger pulse in a capacitor. This larger pulse is wired to the coil the large pulse is able to the coil function as a voltage transformer thereby producing the high voltage necessary to a spark across the gap of the spark

Now for the 2 main type of CDI used in the 49 cc market, AC and DC Both function the same. With the AC unit, plus and minus varying are used to charge the capacitor in the paragraph above. The DC unit 12 volts more or less DC the battery and that voltage is to charge the capacitor described in the above.

Benelli 125 2 C

Pros and Cons:

AC unit the engine to run without the need for a or charging system of any kind.

DC was created to allow higher RPM due to the instantaneous availability of the Charging Where the AC one has lots of complex and to explain things like flux density and residual etc.

The wiring is different usually but not always, the ac ones a rectifier or diode ahead of the CDI and the DC just connect directly to the

the way to tell for sure is to turn on the key and see if 12v is at the CDI assuming all else is correct. units that are DC include:

Agility 50, Diamo Velocity, Triton, Schwinn, Tomos, and high end Chinese, Korean, and scooters.

One easy way to tell is the of your CDI unit. The AC fired CDI be much smaller than the DC CDI, as shown in this Also, you have two plugs on the one with four, the other

If the two wire plug actually has one wire in it, it’s a DC. If it has two wires in it, it is an AC The number of wires is only a guide. The size of the box, with this guide is a determination.

An AC box will be smaller (see and will measure about 1 1/2 by 2 1/2 the DC box will be much larger as it has a converter in it. Such words as AC or DC or AC or DC triggered are the same thing as the AC or DC units. One quick warning on units, with the advanced of our CDI’s your engine may run worse if it’s not running or is carbureted too lean.

I’d installing a larger main jet to full advantage of these

Here is somewhat simplified to determine type:

Headlights on with key, DC. Headlights on with engine,AC

Engine not run without batter, DC. Engine without battery, AC

CDI box is pretty DC. CDI box is smaller, AC (note: our new digital DC are smaller)

There is one wire on the two plug, DC. There is two wires on the two plug, DC.

Here is a standard circuit for a chinese scooter. that the red wire from the to the CDI will not be on a DC fired system. The switch wire will be the positive power source the igntion key switch.


and size difference

Hey MO! How the heck do I if my Minarelli based engine has a or 10mm wrist pin, taking it all apart first? Confused in Chicago

Probably the accurate, without complete is to measure the inside diameter of variator pulley. If it is 21mm, wrist pin is 12mm. If it is 18mm, wrist pin is 10mm.

You can also the number of splines on the outer face where it mates the crank. The smaller 18/10mm has 17 splines, the larger 21/12mm has 15. The larger crank was originally for the JOG90 engine, but comes in too. Also, don’t your Minarelli 2stroke the Franco Morini type two found in TGB R5 Laser, Key West, the Suzuki Address, and some

These kits are also from Scrappydogs, as they are dealers for TGB products.

Benelli 125 2 C
Benelli 125 2 C
Benelli 125 2 C


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