It's too late! As you were finishing your bike's oil change, you felt that awful feeling of stripping the threads. Apart from "Let it be a lesson not to torque to specs," it is only by feel for the drain plug. What can you do now?
 
Drilling and tapping for a large diameter is difficult without stripping the whole engine. Add that some bikes like the Suzuki DR650 already use a 14mm bolt, and the typical size above is 16mm, which can be too much.
 
You could also try to repair it with a Heli-Coil, but they work best on blind holes. Securing the coil on a drain hole requires lots of prep and attention and is not quickly done.
 
Here's the beauty of this kit: It's inexpensive, fast, and easy to install. No special tool is required to save your bike; you could be ready in minutes!
 
This "Save My Case" Drain Plug Thread Repair Kit has a unique bolt slightly larger than the stock one, with a self-tapping head (conical with cutting slots). This part will mount permanently on the case, while the smaller bolt in the middle will piggyback on this large bolt with a threaded hole in the middle.
 
Measure/check the size of your stock drain bolt to choose the correct kit size.
These kits are universal and can work with any bike. We stock 3 sizes commonly found on the following bikes for example:
 
Suzuki DR650: Choose M14x1.25
Suzuki DR-Z400: Choose M12x1.25
Honda XR650L: Choose M12x1.5
 
Installation Instructions:
 
Clean around the drain bolt area and wipe clean the threads to remove any stripped metal.
Thread the piggyback plug into the hole a few turns in, then back out a few turns and remove it to vacuum/clean any loose metal.
Thread it back in until it bottoms out, remove it, then clean up again the same way.
You are ready to install it, so wiping the threads with brake cleaner on a rag is a good idea. Install the piggyback bolt with the large o-ring and a bit of Red Loctite on the threads.
Screw in the small oil drain plug with the small o-ring, and the installation is complete!