GTX Tips

Originally published by Team Losi

If you’d like to increase the brakes on your GTX gas truck, there is a quick, simple trick to make the brakes much stronger. This is especially useful if your GTX is being run mostly on the street or asphalt. The next time you replace the brake pad on the brake arm, put one on the bottom of the tab as the instructions indicate. Then, put an additional piece of brake pad material near the top of the brake arm, as shown in the picture. This will make the braking action much stronger. In fact, the brakes will be so strong that you may need to readjust the collar at the end of the brake linkage rod to reduce the spring tension. If the brakes are still too strong, simply turn the end point adjustment down on the transmitter. It’s not uncommon for the brake throw to be at about 60%-70% with the dual-pad brakes installed.

When operating gas powered trucks, the engines can appear to be very finicky at times. The simplest fix for many of the problems with an inconsistent running gas engine is to simply seal all of the areas on the engine that could potentially leak air. Most, if not all of these areas are located on the carburetor.

To seal the carburetor, you will need a good quality, high temperature silicone sealant. Such a sealant can be

found easily at any auto parts store. Start by removing the carburetor and applying sealant around the neck of the carburetor. When replacing the carburetor be extra careful not to allow any of the sealant to enter into the engine or carburetor. Next, remove the nuts holding the fuel fittings and needle valve housings to the carburetor. There should have been a wrench or two included with your engine that will fit these nuts. Apply silicone sealant to these fittings before re-attaching them. Again, it is very important not to allow the sealant to enter an area that could cause a blockage of fuel flow in the carburetor.

Once a carburetor has been properly sealed, it can operate much more consistently and be much easier to tune in. If you check any of the factory racer’s trucks you will find that every one of their carburetors are sealed.