How to Troubleshoot Your Yamaha TT-R 225

Fuel System

• 1). Check to see whether or not the bike has enough fuel. If there is no fuel, refill with unleaded gasoline and restart the engine.
  
  
• 2). Turn the fuel cock to "RES" if there is a small amount of fuel and restart the engine. Move on to the compression system check if the engine still won't start.
  
  
• 3). Check the fuel flow if there is an adequate amount of fuel in the tank. Turn the fuel cock off, remove the fuel pipe, and look inside.
  
  
• 4). Clean the fuel tank and fuel cock if there is no fuel in the fuel pipe or if fuel is mixed with debris.
  
  
• 5). Restart the engine. Move to the next section if the TT-R 225 still won't start.
  
  

Compression

• 1). Use the electric starter to test the compression system.
  
  
• 2). Ensure that the compression is between 140 and 160 pounds with a compression gauge.
  
  
• 3). Take the bike to the shop to repair the compression system if there is not enough compression.
  
  

Ignition

• 1). Remove the spark plug and check the electrode to analyze the ignition system.
  
  
• 2). Wipe the electrode clean with a dry cloth if it is wet.
  
  
• 3). Replace with the spark plug if the original is damaged or faulty. Yamaha recommends an NGK DR8EA plug.
  
  
• 4). Tighten the spark plug gap to between 0.020 and 0.028 inches.
  
  
• 5). Open the throttle halfway and use the starter again. Take to a Yamaha dealer for inspection if the ignition system still won't work.
  
  

Battery

• 1). Use the electric starter and listen to how quickly the engine turns over. A quick engine turn over indicates that the battery is working correctly.
  
  
• 2). Recharge the battery to 12 volts and tighten all battery connections.
  
  
• 3). Replace the battery if the original is damaged.
  
  
• 4). Try the starter again. If engine turn over is still slow, take the TT-R 225 in for repairs.