This is for all of those Kyosho Inferno (Turbo, MP-5, MP-6) who have ever had one the 4mm self tapping screws that holds the differential cases to the chassis, loosen off or fall out. I know many of my fellow Gas Buggy racers will constantly check all of those screws to make sure that they are tight. Some people will even use CA (super glue) on the screws while getting ready for their main.

Well, we have a very simple solution for this problem that will also help you to save a little weight and lighten up your buggy. The solution involves replacing the supplied M4 self-tapping screws with Team Associated aluminum flathead 8-32 machine type screws. I like to get the ones that are used in Associated on road cars. They are about an inch and a half long, that way I can cut them to the exact length necessary using a Dremel tool with a cut-off disk.  Now to properly change over the screws we must drill the holes in the chassis slightly bigger, this is to create a proper clearance hole for the screws as they are slightly larger in diameter than the factory screws.  An 11/64" drill works quite well but if you have a metric size that is close it will work fine too. Don’t worry about the possibility of the gear cases not centering anymore, because the screws are flatheads going into a countersunk hole, they will center themselves just as the stock steel screws did. Next, use an 8-32 tap to start just a few threads in each of the four holes in each gear case as well as the four holes in the center diff mounts. (If you have the aluminum center diff mounts continue using M4 machine type screws, don’t re-tap the holes). Tighten up the screws by hand the first time, only snugging them up once they have bottomed out, don’t over tighten. Many racers will use an electric screwdriver to remove and replace the screws the next time maintenance is required.  I have to agree that this saves some time and effort but make sure that you don’t over tighten the screws when you use one.