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The Mini Moto is a little scale replica of the World Super Bikes used by the likes of Valentino Rossi and ex champion Carl Fogarty. The Mini Moto comes equipped with either a two stroke air or water cooled engine which are, depending on the model, competent of speeds of up to 60Mph. In this article I will underline the finer points of the elements that make these speeds possible. The two Stroke Engine The two stroke engine gives rise to more hp per pound than the four stroke engine. The two stroke engine comprises of three moving parts, the piston, the rod and the crank. The piston acts as valve that opens and closes the intake and exhaust ports that are located on the walls of the cylinder. Unlike the four stroke engine that fires only each other time of the pistons movement, the two stoke engine fires each time the piston reaches the top of it is travel. This means that the time expended generating power is doubled in the two stroke engine than that of the four stroke engine, as there is no engine coasting for the duration of passive cycles. This is the main reason that the two stroke engine may rev more highly and construct more power (for it is size) that the four stroke. Fuel The two stroke engine needs to be run on a mixture of petrol and two stroke oil. This is so that the engine is held lubricated whilst in use. 99% of all starting troubles are caused by fuel problems. These may stem from bad or old fuel and improperly mixed fuel (please see mixing chart). A mixture that is too lean I.e not sufficient two stroke oil may harm your mini moto’s engine as the moving elements are not in the right manner lubricated. This may cause the engine to seize. However a mixture that is too rich may choke the engine and effect the performance and cause starting problems. You may tell if your mini moto is running too richly by the plumes of white smoke coming out of the exhaust and the lack of performance. A rich mixture (25:1) is necessitated to lubricate the engine for the duration of the ‘run in’ period, you may experience a lack of performance for the duration of this period. The pocket bike may run more tardily and acceleration may be sluggish, nonetheless when you alter to a mixture of 50:1 you will actually detect a difference. The leaner mix ignites in the combustion chamber rapidly and without delay and with a more explosive strength than the richer mix. This means higher revs which means more power and acceleration. We commend that a fuel mixture of 25:1 is applied to ‘run in’ you mini moto, and a mixture of 50:1 is applied thereafter. ‘Running in’ Your mini moto ought to be ‘run in’ for the introductory 3-4 tanks of fuel. During this amount of time we commend that you use a fuel mixture of 25:1. This means a mixture that is made up of 25 constituents petrol to 1 share of two stroke oil. During the ‘running in’ amount of time be careful to not rev the engine to it is greatest or most complete or best possible as this may harm the engine. The ‘running in’ amount of time will concede the moving parts to become well oiled and the clutch and brakes to ‘bed’ themselves in. After you have run the minimoto on this fuel mixture 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 concede for the higher revs that altering to a leaner fuel mix produces. The bike will have to now be ready for a fuel mixture 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 commence your mini moto the clutch spins as the engine ticks over . The clutch is engaged when you pull back on the throttle. The increase in speed of revolution of the clutch makes the clutch exaggerate and grip the inside of the clutch bell which turns the sprocket that drives the back wheel of your pocket bike. The clutch may be set up in dissimilar ways depending on the type of performance that you want from your minimoto. Adjustable clutches are not general on mini moto’s but an after market Polani or Blata style adaptable clutch may be applied in your new mini moto. These grant the rider to adjust the mini moto’s set up in according 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 totally engage. This may result in exuberant wearing. However setting the clutch to engage too early, before the power has built up in the engine may cause your pocket bike to ‘bog down’, resulting in slow acceleration. The perfective set up is to get the clutch to engage just as the engine has built sufficient power to rocket the mini moto away, but without making the clutch slip, this is accomplishable through trial and error. Spark Plug Making sure that your spark plug is fresh is necessary in a two stroke mini moto engine. You may tell a lot from the colour of the spark plug. The top share of your spark plug is covered in ceramic insulator which, when brand new is white. This percentage of the spark plug may alter colour according to how your engine is running. The plug must appear as a nice tan colour when the engine is running perfectly, this gives evidence of finish combustion. A greyish or white colour gives evidence of that the engine is running too lean which may result in engine damage. In this case you will have to clean and check your fuel system for any obstruction, check your fuel mixture, check for loose intake manifold bolts and carburettor mounting leeks, wrong gaskets and leaking crank seals. Anywhere that your engine could potentially leek and suck in fresh air may be the source of a lean condition. A blackened or oily spark plug gives evidence of improper combustion and is the result of running too rich. This may be caused by too much oil in the mixture or the spark plug could be wrong and misfiring. Check the fuel mixture and replace the spark plug. Air Filter Your new mini moto is equipped 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 ordinary mini moto air filter. Both air filters purify the intake of air that is sucked into the carburettor. This means that the air filter must be cleaned regularly as the mini moto’s performance may start out to suffer as the engine may become 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 arid 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 suitable psi. It is necessary to check the tyre pressure regularly, an beneath inflated tyre will affect the performance of your mini moto, acceleration may become sluggish and cornering may become 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 utterly straight running among 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 may manually push the pocket bike, if you listen a ‘pinging’ or ‘popping’ sound the chain is too loose. If the chain is noisy and starts to bind the chain is too tight. Gearing The gearing of you mini moto is dictated by the number of the teeth on the front sprocket and on the back sprocket. The sprockets may be changed as an easy way to manipulate top end speed and acceleration, rather like altering gear on a mountain bike. A front sprocket with more teeth will improve acceleration, nevertheless the top end speed will be reduced. A larger rear sprocket will invent a higher top speed but acceleration will suffer. The gearing on your bike may be adjusted in accordance for the track you are intending to ride I.e. a little track with a lot of bends will suit gearing for bettered acceleration, nonetheless a track with long straights will require 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 indispensable to keep this cable free from obstacles and clean. If the throttle begins to feel ‘loose’ of ‘gives’, the tension of the cable may be adjusted by way of the adjusting screw. Brakes The brake system comprises of brake levers, brake cables, brake callipers and brake discs. The brakes on your mini moto are operated by levers found on the handle bars. The right hand brake controls the front brake, and the left controls the back brake. Pulling on the handle pulls the brake cable which in turn pulls the lever located on the bake calliper. This action pushes the brake discs towards each other. This produces friction on the brake disc which slows down or stops the bike. The brakes may be adjusted in the following ways. The brake cable may 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 it is travel. Undo the clamp that holds the brake cable on the lever located 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 firmly attach the clamp. The crake cable will now be highly tensioned. Pull Start To commence the mini moto pull tardily to turn the fly wheel. This pumps a lot of fuel around the engine, which lubricates the moving parts. Pull the pull start out with resolute determination in order to begin the engine. Important, do not pull the cord to the end of it is run as it may break. If the mini moto does not get started check the choke and the throttle cable. Choke The choke controls the amount of air that is permitted into the air/fuel mix. The choke is adjusted thru a lever located on the side and back of the engine. The choke is off when the lever is down, and on when the lever is up. Carburettor It is commend that any adjustments to the carburettor are made by a professional. The carburettor pumps and mixes the fuel and air. The little diaphragms, orifices and ports mix the air and fuel very precisely, this routine demands clean fresh fuel. Jet The jet may be adjusted by the screw located in the access hole to the right of the choke lever. The jet is adjusted by the give rise to nonetheless 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 optimal setting for performance and then run a somewhat richer mixture as a mix that is too lean may seize the engine. Most helpful customer reviews 45 of 45 people found the following review helpful. 45 of 46 people found the following review helpful. This properly protects my forehead, as well as the back of my head. 12 of 12 people found the following review helpful. |
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