I thought I would take some time and write a blog to answer the qestions I get asked most about my Mekgineer's Chopper.
Being a Hip Gnome Engeriner I had to of corse, make a Mekgineer's Chopper. Apart from the number of requests I get asking to ride shot gun. I also have recived a number of questions regrading these wonderful mounts the
Mekgineer's Chopper ( Alliance)
Mechano-hog ( Horde )
What's the difference between the Mekgineer's Chopper and the Mechano-hog ?
Not alot both use the same model. However that said both use their own mount icon ( a different key) and both have their own textures and colors
The Mechano-hog for the Horde is panted Red and brown with the Horde Insigna on the front of the bike
The Alliance has the Alliance Insignia on the front and is painted Gold and Blue

What is the Level limit requirement to ride one, IS this another Profession only mount ?
To own and ride you must be lvl 80, and no you do not have to be an engineer
To ride shot gun in the side car I know of no level Limit and have had lvl 20's riding shot gun
Is the Side car a separate option does it cost extra to get ?
No the side car is part of the bike and when not in use folds up
It sits on the right hand side and looks as though it is a spare tier with a bag just below it.
Blizzard model designers put a lot of neat detail into the bike model
including the license plate on the back, ( just released never seen a horde bike close enough to see if it is the same license plate

As you can see the License Plate reads PWN. This is also a shot of the "interface" of the bike and the way Blizzard along with PVE planes and tanks has the same sort of controll to dismount.
At the time of writing this the Bike has its own health bar and if you look on your mini map you will see a "Party" icon dot for your bike right under your own icon of yourself
You can ride off almost anything and not die. ( apparently that is about to change will write here if it does)
If you find clicking the "pet" icon for yourt bike a bit of a pain simply right click the "buff" icon and you will dismount
You can not cast spells etc while in the bike however you can interact with PVE Characters for quest etc.
This is simply a look at the left hand side the Bike Foot will come down when you are stopped will lift when riding and if you "jump" pushes down lifting you up on an angled jump into the air
Doe's it matter if I specialize in Goblin or Gnome engineering ?
No it doesn't matter. As the two bikes are faction based, not profession specialization based.
I've seen these on the AH why do they cost so much ?
It is just the expense of the Parts, and the time required to get the other matt's
How much do the parts cost ?
I have split the parts into two groups. Those you can farm and those you have to buy from K3.
12 Titansteel Bar ( if you can mine the Titanium and smelt it this is the cheaper option do not worry about the cool down as you will need to make gold to buy the K3 parts )
If you are buying the Titansteel Bar you are looking at lowest base line cost of 99 to 105 gold per bar.
40 Handful of Cobalt Bolts ( mine Cobalt ore and smelt yourself)
If you are buying the bolts price's range in price depending on sale and demand
2x Arctic Fur If you do not have a skinner or can get from a friend you can buy these on AH from 30 to 50 gold per fur
The K3 Parts
The total cost of the K3 parts is 12500 gold
and is made up as follows

x 8 at 1000 gold each = 8000 gold
x 1 only
x 1 only ( once brought the icon disappers wil come back on your next visit)
Where can I get the Schematic ?
You can get the Schematic from two of your Factions vendors
For the Alliance you can buy it from
Logistics Officer Brighton Alliance Vanguard Quartermaster in the Howling Fjord
Logistics Officer Silverstone Alliance Vanguard Quartermaster in the
Borean Tundra
You must have an exalted reputation with the Alliance Vanguard, do not confuse this with the Alliance Expedition. At lvl 80 if you run lvl 80 instances or heroics. Wear NO FACTION Tabard as Alliance Vanguard is the default faction for rep points.
For the Horde you can buy it from
Gara Skullcrush Horde Expedition Quartermaster in the
Borean Tundra
Sebastian Crane Horde Expedition Quartermaster in the Howling Fjord
As I have no high lvl Horde I can only asume that the same Tabard Rep lore's apply as it does with the Alliance
I hope this has been some help to both engineers and non engineers alike