Know your Mini Moro

Written by Matt Tong

The Mini Moto is a small scale replica ofrepparttar World Super Bikes used byrepparttar 144339 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 onrepparttar 144340 model, capable of speeds of up to 60Mph.

In this article I will underlinerepparttar 144341 finer points ofrepparttar 144342 components that make these speeds possible.

The two Stroke Engine

The two stroke engine produces more hp per pound thanrepparttar 144343 four stroke engine. The two stroke engine consists of three moving parts,repparttar 144344 piston,repparttar 144345 rod andrepparttar 144346 crank. The piston acts as valve that opens and closesrepparttar 144347 intake and exhaust ports that are located onrepparttar 144348 walls ofrepparttar 144349 cylinder. Unlikerepparttar 144350 four stroke engine that fires only every other time ofrepparttar 144351 pistons movement,repparttar 144352 two stoke engine fires every timerepparttar 144353 piston reachesrepparttar 144354 top of its travel. This means thatrepparttar 144355 time spent generating power is doubled inrepparttar 144356 two stroke engine than that ofrepparttar 144357 four stroke engine, as there is no engine coasting during passive cycles. This isrepparttar 144358 main reason thatrepparttar 144359 two stroke engine can rev more highly and produce more power (for its size) thatrepparttar 144360 four stroke.


The two stroke engine needs to be run on a mixture of petrol and two stroke oil. This is so thatrepparttar 144361 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 contain alcohol, asrepparttar 144362 can cause you bike to run ‘lean’. Be advised some racing fuels contain alcohol and are best avoided.. We recommend that you use normal petrol for a garage and a quality two stroke oil.

A mixture that is too lean I.e not enough two stroke oil can damage your mini moto’s engine asrepparttar 144363 moving parts are not properly lubricated. This can causerepparttar 144364 engine to seize. However a mixture that is too rich can chokerepparttar 144365 engine and effectrepparttar 144366 performance and cause starting problems. You can tell if your mini moto is running too richly byrepparttar 144367 plumes of white smoke coming out ofrepparttar 144368 exhaust andrepparttar 144369 lack of performance. A rich mixture (25:1) is needed to lubricaterepparttar 144370 engine duringrepparttar 144371 ‘run in’ period, you may experience a lack of performance during this period. The pocket bike may run more slowly and acceleration can be sluggish, however when you change to a mixture of 50:1 you will really notice a difference. The leaner mix ignites inrepparttar 144372 combustion chamber faster and with a more explosive force thanrepparttar 144373 richer mix. This means higher revs which means more power and acceleration. We recommend that a fuel mixture of 25:1 is used to ‘run in’ you mini moto, and a mixture of 50:1 is used thereafter.

‘Running in’

Your mini moto should be ‘run in’ forrepparttar 144374 first 3-4 tanks of fuel. During this period we recommend that you use a fuel mixture of 25:1. This means a mixture that is made up of 25 parts petrol to 1 part of two stroke oil. Duringrepparttar 144375 ‘running in’ period be careful to not revrepparttar 144376 engine to its maximum as this can damagerepparttar 144377 engine. The ‘running in’ period will allowrepparttar 144378 moving parts to become well oiled andrepparttar 144379 clutch and brakes to ‘bed’ themselves in. After you have runrepparttar 144380 minimoto on this fuel mixture for 3-4 tanks, checkrepparttar 144381 chain and tighten accordingly, checkrepparttar 144382 tyre pressure, tightenrepparttar 144383 bolts onrepparttar 144384 brakes, forks and wheels. You may also need to readjustrepparttar 144385 throttle settings to allow forrepparttar 144386 higher revs that changing to a leaner fuel mix produces. The bike should now be ready for a fuel mixture of 50:1.


The mini moto uses a centrifugal clutch to powerrepparttar 144387 driverepparttar 144388 sprocket, which in turn drivesrepparttar 144389 back wheel of your mini moto. When you start your mini motorepparttar 144390 clutch spins asrepparttar 144391 engine ticks over . The clutch is engaged when you pull back onrepparttar 144392 throttle. The increase in speed of revolution ofrepparttar 144393 clutch makesrepparttar 144394 clutch expand and griprepparttar 144395 inside ofrepparttar 144396 clutch bell which turnsrepparttar 144397 sprocket that drivesrepparttar 144398 back wheel of your pocket bike. The clutch can be set up in different ways depending onrepparttar 144399 type of performance that you want from your minimoto. Adjustable clutches are not standard on mini moto’s but an after market Polani or Blata style adjustable clutch can be used in your new mini moto. These allowrepparttar 144400 rider to adjustrepparttar 144401 mini moto’s set up in according to their preference. Settingrepparttar 144402 clutch to engage too late whenrepparttar 144403 engine has built up too much power may causerepparttar 144404 clutch to slip and never fully engage. This can result in excessive wearing. However settingrepparttar 144405 clutch to engage too early, beforerepparttar 144406 power has built up inrepparttar 144407 engine can cause your pocket bike to ‘bog down’, resulting in slow acceleration. The perfect set up is to getrepparttar 144408 clutch to engage just asrepparttar 144409 engine has built enough power to rocketrepparttar 144410 mini moto away, but without makingrepparttar 144411 clutch slip, this is achievable through trial and error.

Spark Plug

Making sure that your spark plug is fresh is important in a two stroke mini moto engine. You can tell a lot fromrepparttar 144412 colour ofrepparttar 144413 spark plug. The top part of your spark plug is covered in ceramic insulator which, when brand new is white. This part ofrepparttar 144414 spark plug can change colour according to how your engine is running. The plug should appear as a nice tan colour whenrepparttar 144415 engine is running perfectly, this indicates complete combustion. A greyish or white colour indicates thatrepparttar 144416 engine is running too lean which can result in engine damage. In this case you should clean and check your fuel system for any obstruction, check your fuel mixture, check for loose intake manifold bolts and carburettor mounting leeks, faulty gaskets and leaking crank seals. Anywhere that your engine could potentially leek and suck in fresh air can berepparttar 144417 source of a lean condition. A blackened or oily spark plug indicates improper combustion and isrepparttar 144418 result of running too rich. This can be caused by too much oil inrepparttar 144419 mixture orrepparttar 144420 spark plug could be faulty and misfiring. Checkrepparttar 144421 fuel mixture and replacerepparttar 144422 spark plug.

Balancing Act- Ten Tips for Never Tipping

Written by Murray Priestley

To maintain one’s balance is most vital skill in mountain biking. A scrupulous sense of balance is imperative to head anywhere in Trails. There are various different types of terrains in trails; you have to be able to uphold your balance in all terrains. Each of your moves in a trail depends on your ability to preserve your balance. Luckily, you can practice balancing anywhere and anytime. All you need is certain exercises that are specifically aimed at improving your balance.

Here are a few such exercises…

* Start at a very slight slope, point your bike downwards and move as slowly as possible.

* Make a figure ‘8’, progressing in a constantly tauter and slower formation.

* Paint an enormously long line on a flat surface and slowly roll over it.

A regular practice ofrepparttar above mentioned exercises would give would perk up your balance to a great deal bestowing you a confidence, which would be a great help when learning to maintain balance in trails.

Here are a few tips to help you with balancing while mountain biking…

1. The Platform: Maintaining your feet level, i.e., at 3 and 9 o'clock position is your platform position. You are well balanced in platform position and it isrepparttar 144282 best position while biking unless you have to traverse a tight corner. So try to be inrepparttar 144283 position as long as plausible.

2. Once you’re in a platform position,repparttar 144284 position ofrepparttar 144285 rest of your body parts relevant to balancing should be: hands grippingrepparttar 144286 handlebars (but not very tightly), your back should be bent at an angle of 45 degrees, your elbows bent at an angle of 90 degrees, while your knees at 30-50 degrees. Your head should be straight, eyes looking ahead and your chin parallel to top tube.

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