Marking and spark plug gap for Vespa and Piaggio scooters

This article is intended for beginners. It makes sense to check the condition of the spark plug when the engine is unstable, hard to start, or consumes a lot of fuel. By the appearance of the spark plug, you can determine whether the settings of the fuel system, in particular the carburetor, are correct. If the check shows that the spark plug is heavily soiled or damaged, it should be replaced. Fortunately, candles are very inexpensive. How to choose a spark plug for a scooter and what the alphanumeric values ​​in its marking mean can be read here.

To do this job, we will need a 10mm socket wrench, as well as a 21mm spark plug wrench or spark plug socket.

So we need to get to the spark plug. Fortunately, access is very easy.

First you need to open the seat and use a 10mm wrench to unscrew the 4 bolts securing the seat to the frame. For a Honda Tact scooter, you will need to unscrew and remove the oil tank cap. After unscrewing the bolts, remove the seat.

Now, turning the spark plug head left and right, we pull it off the spark plug.

After that, take the spark plug wrench and place it on the spark plug. It may turn out that the spark plug wrench is too long and it rests on the frame, making it impossible to put it on the spark plug. This was the case in my case. Therefore, instead of a spark plug wrench, I just took a 21 socket and an adjustable wrench. Unscrew the spark plug counterclockwise.

That's all. Now you can evaluate the appearance of the candle and, if necessary, replace it with a new one, proceeding in the reverse order.

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At first glance, what could be simpler: unscrew the old spark plug and screw in a new one. But! As elsewhere, there are nuances here, without knowing which you can easily, for example, “break” the thread in the spark plug hole. It is especially difficult in this matter for beginners who know almost nothing about the structure of a scooter, of course).

Spark plug for moped alpha 110 parameters

* Time indicated for the region: Russia, Izhevsk
Although a spark plug for a scooter, as a rule, has a considerable working life, over time it will inevitably require replacement.
Fortunately, the cost of this spare part is low, so a quick repair can be carried out even on a limited budget. In this case, we offer original spark plugs for four-stroke engines for mopeds, scooters, such as Delta, Zodiac, as well as Alpha mopeds, ATVs with an engine capacity of 50-150 cc. The price is for 1 piece, spark plug NGK 4629 C7HSA. Since it is not always possible to determine in advance that new spark plugs will soon be needed, professionals recommend having this part in reserve. At a critical moment, such thriftiness will help save time and money, because you won’t have to look for a new part or run to a specialized store.

Mopeds and mokicks made in China.
Design, operation, maintenance. Delta, Musstang, Leader, Dingo, Sagitta, HongDou, Jianshe, Loncin, Simple, Zip Star, Alpa, Farmer, Dino Eriskay. >> Maintenance of a moped. Checking the condition and replacing the spark plug. Bykov K.P., Shlenchik T.A.

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Checking the condition and replacing the spark plug

Spark plugs recommended by the manufacturer for four-stroke engines are A7TC or A7RTC SX. An analogue of these spark plugs is NGK C7HSA or NGK CR7HSA.

The gap between the spark plug electrodes should be 0.6-0.7 mm.

The NGK company produces “cooler” analogues of the A7TC and A7RTC SX spark plugs: • NGK CH6SA - with a heat rating of 6; • NGK CH5SA- with heat rating 5.

Recommendations for choosing candles are given below.

Rice. 25. Spark plug A7RTC SX

Table 6. Characteristics of the A7RTC SX spark plug.

Routine replacement of spark plugs is carried out every 8 thousand km. However, based on operating experience, spark plugs last no more than 4-6 thousand km.

Rice. 26. Replacing the spark plug

To replace spark plugs you must: • remove the tip of the spark plug wire (Fig. 26.1); • remove dirt around the spark plug; • use a spark plug wrench to unscrew the spark plug (Fig. 26.2); • screw in a new spark plug by hand (Fig. 26.3); • finally tighten the spark plug with a wrench to a torque of 31-39 Nm.

Attention! Over-tightening the spark plugs can damage the threads in the spark plug hole of the cylinder head!

How to choose the right spark plug?

The choice of spark plugs for your moped engine should be taken very seriously. The spark plug crowns the operation of the entire ignition system and largely determines the ease of starting and stability of the engine in all modes, fuel consumption and the durability of the engine itself. It is best to install “original” spark plugs. But what if this is not possible?

Unfortunately, there are no generally accepted standards for the designation of candles, which complicates their selection based on interchangeability.

You can make the right choice of spark plug if you base it on the following parameters: 1. According to the design and dimensions of the threaded part. 2. According to the heat number. 3. According to the design of the sealing part. 4. Turnkey size.

The main operational parameter of a spark plug is the heat value, information about the value of which is given by all manufacturers in the designation.

According to their thermal properties, spark plugs are divided into “hot” - for engines with a low temperature load (usually low-speed engines) and “cold” - for working with a high operating temperature and engine compression ratio (higher-speed and air-cooled engines). The heat number is equal to the average indicator pressure at which glow ignition begins. The higher this number, the more resistant the candle is to high temperatures, therefore, the “colder” it is. The glow number of a spark plug is determined by a special installation based on the occurrence of glow ignition.

Glow ignition is an uncontrolled process of ignition of the combustible mixture from the hot working parts of the spark plug. At a spark plug temperature of 500°C and above, carbon deposits, which are carbonaceous substances formed as a result of the combustion of oil and fuel in the engine combustion chamber, burn out. The candle self-cleanses. Soot mainly consists of coke, ash and oil. Due to poor thermal conductivity, carbonated spark plugs overheat, which in turn causes interruptions in the operation of the ignition system.

When the spark plug temperature is less than 500°C, increased carbon formation occurs on the thermal cone of the insulator and the spark plug begins to work intermittently, as high voltage current leaks through the carbon deposits. To ensure uninterrupted operation of the spark plug, the lower part of the thermal cone of the insulator must have a temperature in the range of 500-600 ° C.

If the temperature of the insulator and the central electrode is too high (more than 800°C), glow ignition occurs when the working mixture ignites from contact with the hot cone of the insulator and the central electrode until a spark appears between the electrodes of the spark plug. As a result, the working mixture ignites too early.

If the glow number of the spark plug is less than that required for a given engine, then interruptions in engine operation may occur and starting it will be difficult.

If the glow number of the spark plug is greater than that required for a given engine, this will cause unstable engine operation, increased fuel consumption and a drop in engine power.

Depending on the ambient temperature, you can use candles with different heat numbers I (the higher the temperature, the higher the heat number): • From 0°C to +5°C-NGKCH5SA- with heat number 5; • From +5°C to +15°C - NGK CH6SA- with heat number 6 or NGK CH7SA, A7TC/A7RTC SX- with heat number 7; • From +15°C to +25°C - NGK CH7SA, A7TC/A7RTC SX- with heat rating 7.

How to determine the health of the engine based on the condition of the spark plug?

A spark plug is a good indicator of engine performance. Based on the condition of its electrode, you can determine the quality of the combustible mixture, the setting of the ignition timing, and the correct choice of the brand of spark plug.

Using Table 7 below, you can determine the correct choice of spark plug, fuel quality, etc., and find the malfunction.

Table 7. Determination of malfunctions based on the condition of the spark plug electrode.

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Mopeds and mokicks made in China. Design, operation, maintenance. Delta, Musstang, Leader, Dingo, Sagitta, HongDou, Jianshe, Loncin, Simple, Zip Star, Alpa, Farmer, Dino Eriskay. >> Maintenance of a moped. Checking the condition and replacing the spark plug.

Delivery

Several delivery methods are available to you:

1. Delivery by Russian Post . It is convenient because delivery is carried out to any corner of the Russian Federation. Possibility of paying for goods upon receipt (cash on delivery).

2. Delivery by SDEK. A large number of order pick-up points. Courier service.

3. Delivery by transport companies. We deliver TK KIT, Energy, Business Lines, PEK and some others. Typically this method is suitable for large cargo. Delivery by this option is only possible with PRE-PAYMENT.

What to do if the candles are flooded with gasoline

There are 2 options to solve the problem. As a rule, a “reasonable” operating manual says: if the injector spark plugs are filled with fuel, you need to unscrew them and dry them. With the spark plugs removed, crank the starter for 10-15 seconds. Put the spark plugs back in and start the engine.

Reliable folk method. If you have filled your spark plugs with gasoline, before unscrewing and drying them, try starting the engine using the following method: purge mode.

The gas handle is turned all the way to the floor. Use the starter to turn the engine for 10-12 seconds, then release the gas handle. The engine should start. The fact is that in this way, when you close the fuel supply, you blow air through the spark plug.

If the engine does not start, then try to dry the spark plugs. Spark plugs for an injector are no different from an engine with a carburetor. Therefore, we again use the “old” method: we unscrew the candles, clean them of carbon deposits with a brush, dry them with a hairdryer, or on a gas stove or in the oven. We control the gap and screw the spark plugs into place. The motor should start.

For used scooters, professional advice is to clean the spark plugs more often, or, more correctly, change them.

If the spark plugs continue to be constantly filled with gasoline, it is necessary to carry out diagnostics of the spark plugs for quality of spark supply, cleanliness of injectors, spark output from the ignition coil, Hall sensor.

Payment

Payment for goods is possible in the following ways:

1. Payment upon receipt at the post office. The goods are paid for upon receipt at your post office. (The most unfavorable method of payment. Because the post office takes a percentage for transferring money to us).

2. Payment on the website. You can pay for your order directly on the website at the time of placing your order. After clicking the “Confirm order” button, you will be taken to the payment page.

4. Partial prepayment. For heavy and expensive items, this payment option is available. You pay part of the cost of the product as a guarantee of its purchase. You pay the rest upon receipt at the post office.

5.Goods that are delivered by ANY transport companies or courier are sent only with FULL prepayment.

Source

How to change?

We take it, buy it, ask someone for a special spark plug wrench. We put the key on the spark plug, insert a screwdriver into the key and turn the spark plug out. After unscrewing the spark plug - carefully so as not to accidentally drop it into the cooling casing - remove it along with the key

As necessary, we insert a new spark plug into the key and very carefully and slowly screw it into place. When you wrap the candle, do not apply much force to it, and if you feel that at the very beginning the candle is wrapped tightly, then you have not hit the thread: unscrew it and try to screw it again.

If the candle went easily, wrap it all the way and pull it slightly. It is not advisable to tighten the candles too much; it will be enough to tighten them a little and this will be quite enough.

Spark plug for moped alpha 110 parameters

Real spark plug

1. The cap nut is almost tightened tightly.

2. The surface of the insulator is polished and absolutely smooth.

3. The four-digit batch number is exactly printed on the hexagon

4. The “waist” of the candle (this is the thin part under the hexagon) has a smooth surface without cuts, scratches or other mechanical damage.

5. This is where the original candle markings should be applied.

6. The washer-gasket cannot be removed or twisted along the thread.

7. Smooth carving with perfect edges.

Performance indicators

Vespa scooter models are distinguished by high performance indicators. All models are equipped with a reinforced metal body, as well as high-quality brakes. The tank holds enough gasoline for several days of intense city driving and is very economical.

Engine

Vespa scooter models are constantly updated with better and more reliable engines. Depending on the model, the vehicle is equipped with a single-cylinder 2-stroke or 4-stroke engine with an electric injection system. In the production of Vespa scooters, engines have different displacements - from 100 cm³ to 300 cm³.

Chassis and brakes

Most often, Italian scooter models are equipped with front disc brakes and rear drum brakes. For better safety, the most powerful scooter models are equipped with an ABS system. A distinctive feature of the Vespa is the monoshock absorber at the front, which adds to the smooth ride.

Model range: description, technical characteristics and prices

Below we will present a more detailed description of the Vespa scooter model range.

Vespa LX 50

The Vespa 50 scooter is a comfortable and reliable option for a lover of retro models. The engine has a volume of 49.4 cm³ and a power of 4.2 hp. will ensure reliable operation of the model. Maximum speed – 45 km/h, fuel tank volume – 8.6 liters. The model weighs only 96 kg. The average cost of the model is 138,000 rubles.

Vespa S 50

This model has a 50 cm³ engine similar to the previous model. The electronic ignition system allows you to quickly gain the required speed. The centrifuge-type automatic transmission with belt drive will help you easily drive the vehicle. Fuel tank volume is 8 liters, power is only 4 hp. The average cost is 140,000 rubles. Below is a review of the Vespa s50 scooter.

Vespa LX 125

The Italian Vespa lx 125 scooter, whose price reaches 170,000 rubles, is considered a faster model. Maximum power reaches 91 km/h. The four-stroke single-cylinder engine with an air-cooling system makes it convenient to move around the city. Fuel consumption is 4.4 liters per 100 km.

Vespa S 125 ie

A comfortable scooter for 275,000 rubles. Luggage racks and a seat hook allow you to take on your daily commute. The small 50cc air-cooled engine with electronic injection gets the job done reliably.

Vespa LXV 125 ie

Model with an engine displacement of 124 cm³. The air cooling system and electric starter allow you to use the vehicle conveniently and safely. The model develops power by 10.7 hp. at 8250 rpm. The cost of a new scooter is 186,000 rubles.

Vespa GTS 125

The Vespa GTS 125 scooter has a CVT gearbox. A 7 liter fuel tank is sufficient for a 124 cm³ engine. Hydraulic disc brakes front and rear ensure safe movement on the most difficult roads. The maximum speed of this Italian scooter is 95 km/h. The cost of the model reaches 390,000 rubles.

Vespa GTS Super 125 ie

A stylish and easy-to-use model with a 4-stroke, 4-valve, 124 cm³ engine. The power of the model is 11 kW at 9,750 rpm. The maximum speed of the model is 103 km/h. Increased fuel tank volume by 9.5 liters. The price of the model is 420,000 rubles.

Model Vespa GTS Super 125 ie

Vespa LX 150

Scooter with a single-cylinder four-stroke engine of 150 cm³. Reliable aluminum wheels, front tire – 110/70 R11, rear – 120/70 R10. High-quality front disc brakes and rear drum brakes allow you to safely ride the Vespa LX 150 scooter even on the most difficult roads. The weight of the scooter is 102 kg, the average cost is 200,000 rubles.

Vespa S 150 ie

The stylish Vespa S 150ie scooter began production in 2008. Convenient, high-quality model with economical fuel consumption - 3.1 liters per 100 km. The engine capacity reaches 150 cm³. As in other models, the presence of front hydraulic wheels, as well as a rear drum. There is a comfortable seat for the driver and passenger, as well as a standard luggage bag. Cost – 250,000 rubles.

Vespa GTV 250 ie

A sophisticated scooter model with a steel frame and hydraulic disc brakes at the front and rear. The engine displacement of 244 cm³ allows you to achieve a power of 22 hp. The larger 9.2-liter fuel tank allows for long trips. The cost of the scooter is 277,000 rubles.

Scooter model Vespa GTV 250 ie

Vespa GTS 250ie

The 2010 model has a 244 cm³ engine and similar characteristics to the previous model. The scooter weighs 151 kg. The vehicle is suitable for active people who want to use Vespa not only for a quiet ride, but also for sports trips.

Vespa GTS Super 300ie

A sporty, powerful model with an engine capacity of 278 cm³. The liquid cooling system prevents the engine from overheating during long driving. The frame is made of high-strength metal, with reinforcements welded to the body. The Vespa GTS Super 300ie scooter is capable of reaching a top speed of 130 km/h. Fuel consumption is 3 liters per 100 km. The price of the model is 448,000 rubles.

Vespa GTV Via

Sports model weighing 146 kg. A distinctive feature is the powerful 278 cc engine with liquid cooling and electronic injection. Maximum power is 22 hp. at 7500 rpm. Stylish design, comfortable leather seat, and 12-inch wheels with chrome inserts. The cost of the model is 480,000 rubles.

https://youtube.com/watch?v=KgwboNcRRDs

Let's start adjusting the valves

Let's start with the intake valve, which is located at the top of the cylinder head. We'll need a key for 9. Yes! Not 8, not 10, but 9! Good thing I had a set of sockets in the car. But it is better to use a spanner wrench, which conveniently unscrews the pusher fixing nut on the rocker arm.

Then we need a feeler gauge with a thickness of 0.05 mm, which must be inserted between the pusher and the valve stem. By rotating the pusher, we reduce or increase the thermal gap until the probe moves with slight tension. After tightening the fixing nut, we again check the gap with a feeler gauge, which could have gone astray.

In a similar way, we begin adjusting the exhaust valve.

Before you start adjusting the valves

Therefore, after purchasing a new Alpha RX, I checked the valve clearance. For this procedure I had to buy a set of probes. In our case, you will need a probe with a thickness of 0.05 mm.

In order to calmly begin adjusting the valves, I had to unscrew the safety bars. For this we need a key of 8.

To get to the valves, you need to unscrew the valve covers located on the top and bottom of the cylinder head. To do this we need a 17 wrench. I used a spanner.