In this guide,i am going to share about master yi and how it is used when equipping it with attack speed items and attack items but these items are a bit expensive.There are both jungle and non-jungle guild.
This is a Champion Spotlight of Master Yi.Sorry i cant find the RiotInc Video for Master Yi. Play Video or Play Video
Good thing about Master Yi. Play Video

Greater Mark of Attack Speed=Increase attack speed to make it easier to kill.

Greater Seal of Health=Increase Hp so that will last longer.

Greater Glyph of Cooldown Reduction=Having a greater chance to kill in early games and earn lots to gold.

Greater Quintessence of Cooldown Reduction=Also the same reason as Greater Glyph of Focus

The masteries that i have chosen is 24/0/6.The reason is that most Masteries that he needed is in offense,like attack speed and attack.
Summoner's Wrath =Able to allow exhaust to decrease the champion's Magic Resistance and armour. And also get 5 AP and AD while ignite is on cooldown.
Brute Force =Increase damage to make it easily to get kills.
Alacrity =More attack speed for him easily to get kills.
Deadliness =Increase a bit of critical chance so we have even higher chances of getting critical hits= higher damage.
Weapon Expertise =Armour penetration for higher physical damage.
Havoc =Increase massive damage and very useful to get kills.
Lethality=I can't recommend it more to characters like Master Yi who spams Attack Speed and Critical damage as this mastery increases your Critical Strike damage.
Vampirism =To prevent yourself from dying and an advantage of life steal.
Sunder =Same reason as Weapon Expertise
Good Hands =Since you kill a lot when soloing a champion, many will like to gank Master Yi down to prevent him from killing even more and some would want the extra gold.Good hands to help you take down even more champions to help your teammate kill the extremely under level champions.
Improved Recall =Will not allow you to waste 8 seconds in recalling
Swiftness =Get bonus speed at the start of the game so will not waste so much time in walking.

Starting items: Vampiric Scepter This is to enable you to survive longer so that you are able to farm more.Also higher recommended in PVP games.

Boots If playing begginer bot game to use to lure.

Doran's Shield If just a starter.Having this item will make master yi rather a defensive charater in the early games.

As you can see my items prices are high so try to get more kills.

Wriggle's Lantern=to get a bit of life steal before getting a better one.
Phantom Dancer=Reason i get 2 of these is that i want master yi to have more critical damage and more attack speed than the rest of the champion.
Black Cleaver=Reduce the enemy armor making it easier to kill.
Bloodthirster=Reason i get 2 of these is that i think Master Yi is a bit squishy and is easily killed and is often in team fights and ganks,so 2 Bloodthirster will be very effective as master yi's attack speed and very fast and he is able to drain the enemy HP and recovering HP to himself very quickly.
Berserker's Greaves=Increase movement speed and attack speed.

Alpha Strike: I increase it to allow master yi to have the kill enemies when they are far away and dying.It is also used for kill stealing to get gold(if you have no choice).

Meditate:Increased this at the end because if your attack is so high what for having healing.

Wuju StyleHaving this skill when the game just started is a very good time to get kill as attack is increased.

HighlanderIt can be used for running away as well as killing enemies.

Using Exhaust and Ignite spell is a very easy way to get kill so i have chosen them as items that are needed are very expensive.

Burning Embers :Pros

Able to get 10 ap when in cooldown
It also increase a bit of Master yi's attack skills

CrippleCons

Not able to tell if able to catch enemies
May get stun and enemies run away

Showing you a video,teaching you how u jungle using yi.
Play Video /league-of-legends/summoner-spell/smite-5

In order to jungle you also need to learn how the counter junglers in case they take your buff and monster kills,preventing you from getting fat.A short video on how you can counter junglers.

Play Video
Hope this video will help to counter junglers

Greater Mark of Desolation=To allow yi to kill monster quickly adn gang others.Bonus armor penetration to kill lizard and golem.
Greater Seal of Health=Receive bonus HP to yi,making easily to get lizard buff and golem buff.
Greater Glyph of Cooldown Reduction=In order to get buffs Yi HP must be high but sometimes when you want to heal,its on cooldown thats why cooldown runes will be very effective.
Greater Quint of Alacrity=A bit of increased attack speed making him easily to kill monsters.

The Masteries page are ALMOST the same except for
Summoner's Resolve =Get 10 bonus gold on use.
Sorcery=Reduced cooldown
Butcher =More damage to monsters

Berserker's Greaves=Increase movement speed and attack speed
Sword of the Divine=Increase attack speed adn have almost the same effect as Yi's passive.
Phantom Dancer=Increase attack speed,movement speed and critical chance.
Black Cleaver=Reduce enemy armor making it easier to kill
Infinity Edge==Increased attack damage and critical chance and critical damage
Bloodthirster=To drain enemy HP.
Wriggle's Lantern=to get a bit of life steal before getting a better one.

No Guide Because busy lately only a video. Play Video

Alpha Strike Able to chase enemies when they use flash or exhaust on you.

Meditate Only some melee characters are able to heal.

Wuju Style A great boost in attack damage without any side effects unlike sion's skill enrage. Can also be activated to double the bonus damage increasing the chances of killing low health enemies with a few strikes and ignite.

HighlanderVery useful skill as it can be refreshed if you kill an enemy champion. It increases your attack speed and movement speed whic enhances your chance of chasing an enemy and killing them easily with Wuju Style.Can also be used as an escape move.

Basic attack and kill all the minions easily as there is high damage and that there is also high attack speed and black cleaver to help you take down minions with high hp such as super minions.Can also use Alpha Strike when there's big groups of minions.

Not so good in teamwork as attack speed and damage are already very high and teammates will likely kill steal you instead of helping you. Chances of killing enemy champions are extremly high so you can get a lot of kills in a gang fight unless restricted by characters like Ryze which can freeze you in your tracks etc.

So just do your best and OWN. Master Yi is a very good character which cost only 450IP. Insane nuker so damage is not a problem unless you are not fed enough. Master Yi can also have a high chance to solo Baron. Its my first guide so please guide me along.Bye bye :P