Repair 7

The two-stroke motorcycle engine is a contradiction. Despite their bare-bones mechanical simplicity, they tend to require far more attention to keep them performing than their larger brothers. Oil must be caully added to the fuel mixture in the correct proportions, and regular rebuilds are not uncommon. Following such a rebuild, it is advisable to complete a period of Running-In to ease the engine back into performing, without putting it under sudden strain. There are countless interpretations of how to do this, but several principles hold true across all of them.

Instructions

1

Start the bike, and allow it to idle for a few minutes until the engine is up to temperature. Do not lean the bike on its side stand, as this will cause the oil to collect in one side of the crank case. Use the center stand, or sit on the bike if it does not have one. Turn off the bike. An important characteristic of the running-in process is gradually increasing the periods of time for which the bike is running. Once it has cooled enough to touch, start it again.

2

Ride the machine for a short 5- to 10-minute run, keeping the throttle below 50 percent, and ensuring that all other components; brakes, shifting, steering, etc.; are all functioning OK. Return home, and allow the bike to cool down completely again. This will generally take at least 30 minutes, but the longer the better. You should be able to touch the pipes and radiator without feeling any residual heat.

3

Start the bike again, and head out for another ride. This time, the throttle can be pushed to 60 percent. After 10 to 15 minutes, return home again, and allow the bike to cool once more. Repeat this process another four times, increasing your throttle limit by 10 percent on each run, every time allowing the bike to cool down completely every time.

4

Ensure all fasteners are still fully tightened. Your two-stroke engine should now be ticking over smoothly. Allowing the engine to properly cool after each run helps small quantities of oil to act as a seal at the points where different components meet, reducing the possibility of damaging the pistons.

Since Karl Benz patented the automobile in 1886, it has undergone some drastic changes, such as: electric starter motor, fuel injection, electronic ignition and computerized engine management. One of the electronic advancements in modern automobiles was the neutral safety switch, This switch acts as a safety device by preventing the vehicle from starting in gear. When the neutral safety switch fails, it can cause more problems than you may think.

Mechanics

The neutral safety switch uses both electronic and mechanical mechanisms to perform its main function, which is to sense the position of the gear shifter and only allow an electrical current to pass through to the starter motor if the gear shifter is in "Neutral" or "Park."

Additional Functions

On some vehicles, the neutral safety switch performs multiple tasks. The most common secondary function is as the reverse light switch, meaning it also engages the reverse lights when you place the gear shifter in reverse.

Failure

As with any electromechanical component on your vehicle, the neutral safety switch can fail over time. If this sensor cannot correctly read the shifter being in Park or Neutral, it will not allow the car to start, leaving you stranded where you are.