How to disassemble the engine on an Orion moped

Engine Features

The engine of the Chinese Alpha moped has characteristic features, thanks to which fans of motorcycle technology prefer this particular model.

Engine for Alpha moped

Engine capacity - 72 cc. With the right approach, it can be upgraded to 110 cc. Also, if desired, you can increase the speed by 10 kilometers.

The weak point of the engine is the gearbox, which requires close attention and a delicate approach . When repairing the “heart” of a moped, you need to know how to correctly disassemble and reassemble this part of the motorcycle “organism”.

Alpha is equipped with a powerful engine, the circuit of which is complex. If you can’t figure it out on your own, it is recommended to contact an experienced specialist. The price of repairs is quite affordable.

Causes of malfunction

The Chinese Alpha moped, whose price is affordable, does not cause owners many problems. Interruptions in a moped engine have several causes, and once you understand them, you can quickly fix the breakdown.

Disassembling the moped engine

So, if the engine starts with great difficulty, the muffler “shoots”, and smoke comes out of the chimney, it means that the moped is “capricious” due to problems with the carburetor. In order to solve this problem with the Alpha moped, you need to:

If the Alpha slowly picks up speed, and its engine is not able to develop the declared power, then the reason is the incorrect operation of the moped valves. It can also “get sick” due to gaps and incorrect timing. In order to make the Alpha moped function normally, it is necessary to replace the used valves with new ones.

If the Alpha moped is not able to reach the required speed, despite the roar of the engine and solid revolutions, it is impossible to stop the spinning wheel, and gear shifting occurs intermittently, then the cause of the malfunction is clutch wear.

Moped clutch parts

To eliminate the breakdown, you must perform the following manipulations:

Another cause of moped engine malfunction may be wear on the drive sprockets. If they are very worn, they must be replaced with new ones.

You may encounter the problem of engine overheating. The situation can be corrected after adding oil. If oil leaks, you must urgently contact a professional service .

Alpha moped engine overheating

Engine disassembly

Disassembling the Alpha engine is quite simple. To do this you need:

After performing the necessary manipulations, you need to properly assemble the engine, installing all the parts in place.

A diagram can help you understand the nuances. Also, a lot of useful tips regarding repairing the most important “organ” of the Alpha moped are contained in the training video.

Alfa moped engine repair

Recommendations for repairing the Alpha engine.

As we all know, any motorcycle wears out and breaks over time, especially if it is not handled correctly. The most important part of the Alpha moped is its engine, which, if handled improperly or repaired or replaced with spare parts, may not work or work incorrectly. To avoid such problems, you need to know how to properly repair the engine of an Alpha moped with your own hands. This is easy to do if you have the necessary experience and knowledge.

Let's start repairing the Chinese miracle of technology

The Alpha 72cc moped is one of the most famous representatives among Chinese motorcycles. This moped is perfect for use both in rural areas and on city roads. A durable iron frame, complete absence of plastic parts, large diameter wheels - simply created for domestic roads, the quality of which is far from European level.

If you ride often, the rather high seating position of the ALPHA moped makes it possible to overcome low obstacles. A big advantage when choosing a moped is its low price, which makes the purchase quite affordable. This would be a good choice for a beginner.

There are models with a side trailer. Practical to use in rural areas. A reliable assistant in the household.

Economical, with an engine capacity of 72 cubic meters and air cooling, the Alpha moped is unpretentious. This is an extremely simple transport and servicing it couldn’t be easier! You simply cannot find a simpler engine, and spare parts cheaper than Alfa’s can only be found in a dream.

Anyone can carry out tuning or repairs on an Alpha moped with their own hands.

Before you start disassembling the motor, you should fix it on the center stand and completely remove all the plastic. All power systems should be turned off - tank, carburetor and fuel filter; The oil should also be drained.

The engine should be removed along with the transmission, and the Alpha moped should be repaired on a flat surface.

You can remove the alpha engine according to the following diagram:

remove the muffler and exhaust pipe;
remove the camshaft gear cover;
unscrew all 4 bolts from the cylinder cover;
remove the top cover and cylinder head;
We study the degree of wear of the valves, check how dirty the insides of the system parts are.

Is this your first time repairing an Alpha moped yourself? No problem! A moped is not a hadron collider; nothing has changed in 50 years of moped construction. For convenience, draw a diagram of the location of the parts so that later you can complete the assembly without any problems.

A smartphone can help, take photos of each step so that later you can reassemble in the reverse order without confusion.

If it is necessary to replace the valves, or if there are gaps in the fit, then they need to be removed:

Place the head on a level place. To prevent the valve from being damaged during dismantling, it is better to place a layer of thick rubber or a rag under it;
we select the socket head, place it on the valve plate and hit it hard with a hammer;
release the crackers, remove the top plate and valve washer;
remove the valve and guide bushing. To complete the repair of the Alfa moped engine, after replacing the parts, we begin assembling the engine in the reverse order, putting everything in its place, observing the marks. Don't forget to add fresh oil.

Do-it-yourself repair of Alpha moped engines

When the moped does not start, the muffler fires and black smoke comes out of it, this means that you have a problem with the carburetor. To fix these problems, you need to clean the carburetor and air filter, also make carburetor adjustments and tighten the bolts thoroughly.

If your moped takes a long time to accelerate, and the engine does not have enough standard power, the problem is broken valves. The old valves need to be replaced with new ones and the moped will work again.

If the Alpha moped cannot accelerate to the required speed, although it has high speeds, and the engine roars like crazy and shifts gears intermittently, the problem is clutch wear. To repair the clutch you need to do the following: you must remove the engine and the plastic cover from it, then unscrew the clamping bolt and the adjustment mechanism, then tighten the clamping bolt tightly, and start the moped. After all this, you need to drive a little at first speed, about a couple of meters. Also, another cause of engine-related problems is wear of the drive sprockets , in which case you will have to replace them with new ones.

Engine overheating . This problem can be solved very simply - add oil. If suddenly oil leaks from somewhere, you should definitely contact a professional.

Improved appearance

Probably every vehicle owner wants his car to look as attractive as possible. That is why tuning mopeds is most often aimed at improving the overall design. At the same time, you can optimize not only the appearance, but also the overall functionality of the model. Some of the most common improvements include:

replacing the seat with a wider and more comfortable model;
installation of special panels that protect the legs and also prevent fractures;
installation of wider wheels (this leads to increased stability, which is especially necessary when replacing the power unit);
windshield installation. This will help improve your riding comfort. At the same time, such an accessory negatively affects the aerodynamic properties of the model, especially when driving at speeds of 40 km/h or more;
replacing disks. Here we are talking mainly about aesthetic preferences, since the basic discs are also quite good;
replacing the plug. Such a solution is necessary if you often drive on rough roads or off-road. By strengthening the shock absorbers, you can significantly reduce the load on the wheels;
replacement of lighting. New LEDs will be a great option, as they shine brightly and look stylish. But you should not buy xenon lamps, since their quality is not much better, but they will dazzle passing drivers, which can increase the likelihood of unforeseen situations on the road;
installation of rear view mirrors. The factory model looks quite unpresentable, so new mirrors will greatly change the appearance of the model. Additionally, turn signals can be installed on them, which increases the practicality of the devices.

Finally, it’s time to start painting your iron horse. The choice here is simply huge, so you can give your moped the style you've always dreamed of.

You may also be interested in: High-quality and inexpensive Baltmotors motorcycles

Dismantling engines and gearboxes of Alpha mopeds

In order to disassemble the engine you need to do the following:

Remove the screws located in the intake manifold.

Remove all cylinder covers and screws.

Remove the cylinder head.

The gearbox is disassembled to replace parts such as rotors, clutches or cylinders.

In order to disassemble the gearbox you need to do the following:

Remove the retaining ring, then the drive gear is removed.

Unscrew the locking gear screw, then remove the gear shift mechanism itself

Remove the shift fork and shaft, then the crankshaft and drum.

Put everything back to front.

And in conclusion, we would like to say that although the Alfa moped rarely breaks down, it is not worth disassembling and repairing it yourself if you lack knowledge and experience, or you are simply not completely sure that you can handle it, since if you want to save money, you can lose a lot more . Therefore, you should not refuse the services of professionals. But still, if you decide to repair the engine of the Alpha 110 moped yourself, do not forget to use the diagram or training video. And if there is no diagram, then mark the location of the parts on a piece of paper so as not to forget.

Alpha moped engine assembly (part 1)

Alpha moped engine assembly (part 2)

You might be interested in the Alfa 125 cc engine with automatic clutch, tuning

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Gearbox disassembly

It is necessary to disassemble the gearbox in order to replace used parts. This is done after the following parts have been dismantled:

Gearbox disassembly

Repair of this part of the engine is carried out as follows:

Using a screwdriver or blade, remove the retaining ring and the drive gear;
Carefully unscrew the gear fixing bolt and remove the gear shift mechanism;
remove the gear shift fork and shaft;
remove the crankshaft and drum (including the core);
After replacing the worn part with a new one, reassemble (in reverse order).

Advantages of the online store of motorcycle parts “MotoArt”

The catalog of the MotoArt store presents high-quality batteries for Alpha 110 and other models of mopeds. A large selection of various types of devices, differing in their capacity, size, technical parameters and price, will allow you to choose the most suitable battery model. The best modifications of rechargeable batteries made in Ukrainian, Chinese and Taiwan are presented to buyers. All units are accompanied by quality certificates and are carefully checked before being sent to the client for manufacturing defects.

Causes of malfunction

Disassembling the moped engine

Moped clutch parts

To eliminate the breakdown, you must perform the following manipulations:

Another cause of moped engine malfunction may be wear on the drive sprockets. If they are very worn, they must be replaced with new ones.

You may encounter the problem of engine overheating. The situation can be corrected after adding oil. If oil leaks, you must urgently contact a professional service .

Alpha moped engine overheating

Engine disassembly

Disassembling the Alpha engine is quite simple. To do this you need:

After performing the necessary manipulations, you need to properly assemble the engine, installing all the parts in place.

A diagram can help you understand the nuances. Also, a lot of useful tips regarding repairing the most important “organ” of the Alpha moped are contained in the training video.

Let's get started

So, the battery is ready to charge. Connect the terminals of the charger to the battery. The red terminal is to the positive terminal of the battery, the black (or blue) terminal is to the negative terminal. Don't mix up the polarity!

Most modern chargers automatically set the charge current and charging time. But if it is possible to set the charging current, it is chosen by dividing the nominal capacity of the battery by ten. For example, with a capacity of 4 Ampere-hours, the charge current should be 0.4A. In this case, the charging time will be approximately 10 hours.

You should not charge a motorcycle battery with a car charger if it cannot charge with a current of less than 1A. High charging currents can damage the battery.

Battery care rules

The battery requires proper storage and care. Here are some requirements for proper operation of a scooter battery , so that it will last a long time.

First, do not allow the battery to be discharged to more than half its capacity. In general, the battery should not be allowed to be stored in a discharged state. If you feel that the scooter starter is having difficulty cranking the engine, recharge it as quickly as possible.

The battery must be kept clean, since dirt accumulating on the terminals contributes to the rapid discharge of the battery due to current leakage. Keep contacts clean and free of oxides.

In order to prevent a short circuit at the battery terminals, which can permanently damage the battery, you need to spare no expense in purchasing fusible links, preferably factory-made ones. Homemade fuses, which often fail, can only make the situation worse.

Measure the voltage at the output terminals with the engine running, it should be between 13.5-14.5 Volts. If abnormal, check the scooter's voltage regulator.

If your scooter is equipped with a serviceable battery, check the electrolyte level at least once a month. If the level drops, add distilled water. Plain water causes the battery to fail faster.

You should always remember that equipping a scooter with a radio, additional headlights, and an alarm requires the scooter owner to check the battery charge more often, since all these devices require additional electricity.

Running in an improved moped

After the engine has been upgraded, you should start running it in. At the same time, it is better to develop maximum speed in deserted places. Sometimes it happens that the suspension and braking systems cannot cope with the increased power of the power unit, so you will have to use a parachute to brake. If the silent blocks begin to fall out while driving, then the shock absorbers, fork and brake system should be replaced.

It will also be interesting: Features of the Yamaha R1 motorbike: the pros and cons of the sports Yamaha R1

Alpha moped repair

The affordable price has made the Chinese 50 cc moped “Alpha” the literal favorite in the demand for “stools”; in the same bunch is its slightly more durable twin brother “Delta”. Economical, with an engine capacity of 72 cc and air cooling, the Alpha moped is unpretentious and easy to maintain. The clear design of the Alpha moped engine allows you to repair or tune the equipment yourself.

Alpha moped engine repair

Before disassembling the engine of the Alpha moped, we fix the scooter with the central stand and free it from the plastic. We disconnect all engine power systems and do not forget to drain the oil.

We remove the engine along with the transmission, and on a flat surface we continue the home repair of the Alpha moped.

It will help to properly dismantle the Alpha moped engine by disassembling it according to the following scheme:

If this is your first time doing a DIY repair on an alpha moped and you need to disassemble it, don’t forget to sketch a diagram of how everything was in place! If the valves need to be replaced, or if there are gaps in the fit, then they need to be removed:

To complete the repair of the Alfa moped engine, after replacing the parts, we begin assembling the engine in the reverse order, putting everything in its place, observing the marks. Don't forget to add fresh oil.

Alfa moped box repair

The gearbox of the Alpha moped sometimes fails and requires constant attention. Repairing a gearbox at home is not particularly difficult for a beginner.

We carefully read the instructions for the alpha moped, do-it-yourself gearbox repair.

Let's take it slowly, in order:

When the repair of the Alpha moped box is completed, assemble the gearbox using the reverse algorithm.

Tuning

For many, Alfa moped repair begins almost immediately after purchase. Thanks to the presence of spare parts and the simplicity of the Alpha moped engine, tuning is common. This could be replacing the not very comfortable original seat, or increasing the engine capacity to 110 cc. Replacing the sprocket from 14 to 15 or even 16 will increase the speed to 10 km/h.

Increase in cylinder volume - replacement from 50 cc. at 70 cc., will add power, which is sometimes lacking. To do this, in addition to the cylinder head, you will have to change the pistons and carburetor. You can carry out such maintenance of the Alpha moped yourself. If you bought an Alpha moped, repairing the gearbox and engine yourself will be a good opportunity for you to study your equipment.

And finally, some useful tips that will make repairing an Alpha moped a more enjoyable experience for you.

Alfa moped box repair

The gearbox of the Alpha moped sometimes fails and requires constant attention. Repairing a gearbox at home is not particularly difficult for a beginner.

How to rebuild a gearbox with your own hands?

We carefully read the instructions for the alpha moped, do-it-yourself gearbox repair.

Let's take it slowly, in order:

We first dismantle the cylinder, then the rotor and clutch block;
carefully remove the retaining ring (you need a screwdriver and a thin knife or blade) and the drive gear;
To remove the speed unit, unscrew the fastener - the bolt on the back side.
remove the gear shift fork;
remove the crankshaft and drum.

When the repair of the Alpha moped box is completed, assemble the gearbox using the reverse algorithm.

Consequences of untimely replacement

If you don't change your air filter, at best its performance will deteriorate over time. The moped will lose power and stop idling. Also, dust getting into the carburetor will clog all the channels, which will lead to unstable operation. The worst case scenario may be that dirt gets into the engine itself. Large particles will leave deep scratches on the cylinder bore and on the piston. The valve assembly may fail. Accordingly, a major overhaul of the engine will be required, so you should not neglect replacing the air filter. The consequences can be dire.

The frequency of replacement depends on the level of road pollution in the area. The cleaning system should be carefully inspected periodically.

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