Simple thread is simple! Just post what vehicle n character combinations you use! If you haven't yet come up with any staple combos, then use this handy dandy stat calculator below!
http://www.gunslingergaming.com/html/MK8Stats.php
And here are some of my combos! I may only use Inside Drift Bikes atm, but I've still managed to come up with combos for every character of every weight class!
Baby Peach + Comet + Cyber Slick + Peach ParasolSpeed: 2.75
Acceleration: 4
Weight: 2
Handling: 5.50
Traction: 2.25
Lakitu + Sport Bike + Azure Roller + MKTV Parafoil
Speed: 2.25
Acceleration: 5
Weight: 1.75
Handling: 5.25
Traction: 2.75
Daisy + Sport Bike + Sponge + Flower Glider
Speed: 3
Acceleration: 4
Weight: 2.50
Handling: 4.25
Traction: 3.25
Mario + Yoshi Bike + Slick + Waddlewing
Speed: 4.25
Acceleration: 3
Weight: 3.75
Handling: 4
Traction: 1.50
Roy + Sport Bike + Cyber Slick + Parachute
Speed: 4.75
Acceleration: 3
Weight: 4
Handling: 3.50
Traction: 1.25
Pink Gold Peach + Comet + Off-Road + Peach Parasol
Speed: 4.25
Acceleration: 3
Weight: 4.25
Handling: 3.50
Traction: 2
Bowser + Jet Bike + Roller + Bowser Kite
Speed: 4.25
Acceleration: 4
Weight: 3.75
Handling: 3.25
Traction: 1.75