Know Your Mini Moto

The Mini Moto is a small scale replica of the World Super Bikes used by the likes of Valentino Rossi and ex champion Carl Fogarty. The Mini Moto comes qualified with whether a two stroke air or water cooled engine which are, depending on the model, capable of speeds of up to 60Mph.

In this report I will underline the finer points of the components that make these speeds possible.

Clamp Meter

The two Stroke Engine

The two stroke engine produces more hp per pound than the four stroke engine. The two stroke engine consists of three inviting parts, the piston, the rod and the crank. The piston acts as valve that opens and closes the intake and exhaust ports that are placed on the walls of the cylinder. Unlike the four stroke engine that fires only every other time of the pistons movement, the two stoke engine fires every time the piston reaches the top of its travel. This means that the time spent generating power is doubled in the two stroke engine than that of the four stroke engine, as there is no engine coasting while passive cycles. This is the main intuit that the two stroke engine can rev more very and yield more power (for its size) that the four stroke.

Fuel

The two stroke engine needs to be run on a aggregate of petrol and two stroke oil. This is so that the engine is kept lubricated whilst in use.

99% of all starting problems are caused by fuel problems. These can stem from bad or old fuel and improperly mixed fuel (please see mixing chart).
Do not use fuels that include alcohol, as the can cause you bike to run 'lean'. Be advised some racing fuels include alcohol and are best avoided..
We advise that you use general petrol for a garage and a capability two stroke oil.

A aggregate that is too lean I.e not adequate two stroke oil can damage your mini moto's engine as the inviting parts are not properly lubricated. This can cause the engine to seize. However a aggregate that is too rich can choke the engine and consequent the performance and cause starting problems. You can tell if your mini moto is running too richly by the plumes of white smoke advent out of the exhaust and the lack of performance. A rich aggregate (25:1) is needed to lubricate the engine while the 'run in' period, you may sense a lack of performance while this period. The pocket bike may run more slowly and acceleration can be sluggish, However when you turn to a aggregate of 50:1 you will admittedly observation a difference. The leaner mix ignites in the combustion chamber faster and with a more explosive force than the richer mix. This means higher revs which means more power and acceleration.

We advise that a fuel aggregate of 25:1 is used to 'run in' you mini moto, and a aggregate of 50:1 is used thereafter.

'Running in'

Your mini moto should be 'run in' for the first 3-4 tanks of fuel. while this duration we advise that you use a fuel aggregate of 25:1. This means a aggregate that is made up of 25 parts petrol to 1 part of two stroke oil. while the 'running in' duration be specific to not rev the engine to its maximum as this can damage the engine. The 'running in' duration will allow the inviting parts to come to be well oiled and the clutch and brakes to 'bed' themselves in. After you have run the minimoto on this fuel aggregate for 3-4 tanks, check the chain and tighten accordingly, check the tyre pressure, tighten the bolts on the brakes, forks and wheels. You may also need to readjust the throttle settings to allow for the higher revs that changing to a leaner fuel mix produces. The bike should now be ready for a fuel aggregate of 50:1.

Clutch

The mini moto uses a centrifugal clutch to power the drive the sprocket, which in turn drives the back wheel of your mini moto.

When you start your mini moto the clutch spins as the engine ticks over . The clutch is engaged when you pull back on the throttle. The growth in speed of revolution of the clutch makes the clutch enlarge and grip the inside of the clutch bell which turns the sprocket that drives the back wheel of your pocket bike.

The clutch can be set up in distinct ways depending on the type of performance that you want from your minimoto. Adjustable clutches are not thorough on mini moto's but an after store Polani or Blata style adjustable clutch can be used in your new mini moto. These allow the rider to adjust the mini moto's set up in agreeing to their preference. Setting the clutch to engage too late when the engine has built up too much power may cause the clutch to slip and never fully engage. This can consequent in excessive wearing. However setting the clutch to engage too early, before the power has built up in the engine can cause your pocket bike to 'bog down', resulting in slow acceleration. The perfect set up is to get the clutch to engage just as the engine has built adequate power to rocket the mini moto away, but without making the clutch slip, this is achievable through trial and error.

Spark Plug

Making sure that your spark plug is fresh is foremost in a two stroke mini moto engine. You can tell a lot from the colour of the spark plug. The top part of your spark plug is covered in ceramic insulator which, when brand new is white. This part of the spark plug can turn colour agreeing to how your engine is running. The plug should appear as a nice tan colour when the engine is running perfectly, this indicates faultless combustion. A greyish or white colour indicates that the engine is running too lean which can consequent in engine damage. In this case you should clean and check your fuel principles for any obstruction, check your fuel mixture, check for loose intake multiple bolts and carburettor mounting leeks, faulty gaskets and leaking crank seals. everywhere that your engine could potentially leek and suck in fresh air can be the source of a lean condition.

A blackened or oily spark plug indicates improper combustion and is the consequent of running too rich. This can be caused by too much oil in the aggregate or the spark plug could be faulty and misfiring. Check the fuel aggregate and replace the spark plug.

Air Filter

Your new mini moto is qualified with an air filter. Some bikes such as the B1 Origami rep liquid cooled and the Mini Dirt bike have a 'cone' style K and N style air filter. The 2005 mk2 mini moto and the B1 Origami Replica air cooled bikes have a thorough mini moto air filter. Both air filters purify the intake of air that is sucked into the carburettor. This means that the air filter should be cleaned commonly as the mini moto's performance can begin to suffer as the engine can come to be starved of air if the air filter is choked with debris. To reach the air filter, remove the bikes bottom fairing, remove the protective cover by unscrewing the keeping screws. Clean the air filter in petrol but make sure that the filter is dry before reattaching to you mini moto.

Tyres

The tyres on your mini moto are filled with air (pneumatic). Please consult your mini moto handbook for the thorough psi. It is foremost to check the tyre pressure regularly, an under inflated tyre will sway the performance of your mini moto, acceleration can come to be sluggish and cornering can come to be dangerous.

Chain

Before riding your mini moto you need to make sure that the front and back sprockets are aligned and that the chain is perfectly straight running in the middle of them. Once you have established this make sure that the chain is tensioned correctly (please see your mini moto handbook). To test the tension of the chain you can manually push the pocket bike, if you hear a 'pinging' or 'popping' sound the chain is too loose. If the chain is noisy and starts to bind the chain is too tight.
Make sure that the chain is well oiled. The chain needs to be oiled before every ride.

Gearing

The gearing of you mini moto is dictated by the estimate of the teeth on the front sprocket and on the back sprocket. The sprockets can be changed as an easy way to manipulate top end speed and acceleration, quite like changing gear on a mountain bike. A front sprocket with more teeth will heighten acceleration, However the top end speed will be reduced. A larger rear sprocket will yield a higher top speed but acceleration will suffer. The gearing on your bike can be adjusted in accordance for the track you are intending to ride I.e. A small track with a lot of bends will suit gearing for improved acceleration, However a track with long straights will want a mini moto that is geared for a higher top speed.

Throttle

The throttle on your new mini moto is a 'twist grip' style throttle. When you twist the throttle the throttle cable is pulled back revving the engine. It is foremost to keep this cable free from obstacles and clean. If the throttle begins to feel 'loose' of 'gives', the tension of the cable can be adjusted via the adjusting screw.

Brakes

The brake principles comprises of brake levers, brake cables, brake callipers and brake discs.

The brakes on your mini moto are operated by levers found on the cope bars. The right hand brake controls the front brake, and the left controls the back brake. Pulling on the cope pulls the brake cable which in turn pulls the lever placed on the bake calliper. This activity pushes the brake discs towards each other. This creates friction on the brake disc which slows down or stops the bike.

The brakes can be adjusted in the following ways.

The brake cable can be tensioned using the adjustment screw found on the brake lever. Unscrew the locking nut, twist the screw to reach the desired tension. Re screw the locking nut.

This is a two person job. Adjust the screw on the hand brake so that is at the end of its travel. Undo the clamp that holds the brake cable on the lever placed on the brake calliper. One person needs to push the lever forward as far as it will, the second person needs to pull back on the brake cable and re fasten the clamp. The crake cable will now be very tensioned.

Pull Start

To start the mini moto pull slowly to turn the fly wheel. This pumps some fuel nearby the engine, which lubricates the inviting parts. Pull the pull start firmly in order to start the engine. Important, do not pull the cord to the end of its run as it can break. If the mini moto does not start check the choke and the throttle cable.

Choke

The choke controls the estimate of air that is allowed into the air/fuel mix. The choke is adjusted via a lever placed on the side and back of the engine. The choke is off when the lever is down, and on when the lever is up.
When you start the mini moto the choke should be on, when the mini moto is warm and ready to ride the choke needs to be off.

Carburettor

It is advise that any adjustments to the carburettor are made by a professional. The carburettor pumps and mixes the fuel and air. The small diaphragms, orifices and ports mix the air and fuel very precisely, this process demands clean fresh fuel.

Jet

The jet can be adjusted by the screw placed in the passage hole to the right of the choke lever. The jet is adjusted by the design However the conditions of where you wish to ride may be different, which means that you will need to make adjustments. Turning the screw clockwise will make the bike run with a leaner mixture, and counter clockwise will richen the mixture. Only adjust the screw 1 tern a at time and then test the mini moto, this is trail and error. Please note that it is best to find the optimum setting for performance and then run a slightly richer aggregate as a mix that is too lean can seize the engine.

Know Your Mini Moto

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