Obtain a Mekgineers Chopper or a Mechano-hog.

You either need to be an engineer or have an engineer make you this awesome bike.

Here is the cost breakdown and where to get each item.

• 1.Mechano-hog Plans and Mekgineers Chopper Plans cost 450 gold can be found at the Horde Expedition or Alliance Vanguard Quatermaster. You need to be exhalted to purchase it!
• 2. 8 Goblin-machined Pistons 1000 gold (8000 gold total) each.
• 3. 1 Elementium-plated Exhaust Pipe 1500 gold.
• 4. 1 Salvaged Iron Golem Parts 3000 gold.
• All of these minus the plans can be bought from Roxi Ramrocket at K3.

The following mats can farmed or bought off the auction house.

• 1. 12 Titansteel Bars.
• 2. 2 Arctic Fur.
• 3. 40 Handful of Cobalt Bolts.

Now you have your shiney new bike and a cool achievement.