- Inspect the rear axle: Rotate the rear axle with your fingers and get a ‘feel’ for the gearing of the slot. You don’t even have to remove the body to do this although it may be easier. Assess if the gearing is too tight (something that may damage the slot’s motor) and you can also assess if there is slack or lateral ‘play’ in the rear axle and therefore in the gearing.
- Inspect tire/wheel installation: Make sure all the tires are correctly fitted to the wheels, be sure to inspect the inside of the wheels particularly to ensure the tires are installed correctly, (this issue is found more common with Fly slot cars).
- Inspect tire profile: This is easily done by turning each wheel (more so the rear wheels) through a full rotation while visually inspecting the cross-section of the tire. If the tire cross-section is not completely flat, you may need to true the rubber but we will do that later, just make not of any issues you find for now.
- Test for tire/body rubbing: You are looking for the presence of tires rubbing on the body, especially around the rear axle. Turn the slot over and once again turn the wheels through a full rotation and check for rubbing. This may happen due to slack or lateral movement being present in the rear axle. Unfortunately a common problem with Ninco slot cars is front tires rubbing on the body. This is because there is generally a huge amount of play present in the front axle allowing the front wheels to stick outside the body line of the car (this is also a huge cause of noise). Once again just make note of you findings.
- Inspect glide: What you’re testing here is the amount of ‘freedom’ the glide has. An ideal glide should be able to be turned freely (without excessive force) in your fingers. Wiring from the motor to the guide should connect to the guide in a curved fashion from both sides of the body, (chassis in plan view) this will allow the guide to centre itself. Likewise the guide should not be too loose i.e. the guide post should not be able to move irregularly in the guide post housing. If the guide is sprung, check that it is functioning correctly.