Waxing philosophical about aging and motorcycles
Triumph Street Twin Gear Position Sensor Oil Leak
Triumph Street Twin Gear Position Sensor Oil Leak

Triumph Street Twin Gear Position Sensor Oil Leak

Street Twin Gear Position Sensor Oil Leak

I have experienced a minor oil leak that comes from the gear position sensor/indicator on the right side of the motorcycle. The gear position sensor is located behind the front sprocket cover. It uses 2 round gaskets to provide a seal and sometimes these gaskets stop doing their job.

Here I have some videos of the process I went through to change my gaskets, but the process is basically:

  1. Remove the sprocket cover – store its bolts inside the cover, set the cover aside (8mm bolts).
  2. Remove the gear position sensor/indicator (8mm bolts).
  3. Remove the 2 round gaskets.
  4. Clean up any gunk around the area.
  5. Install 2 new gaskets (yes it requires 2). I like to rub a small amount of oil on the gaskets to prevent sticking. The same concept as rubbing a bit of oil on the oil filter gasket prior to installing it.
  6. Reinstall the gear position sensor/indicator. Pay attention to the brass pin on the sensor to ensure it lines up with a square hole inside the engine casing.
  7. Reinstall the sprocket cover.

Here are the videos that follow the above process:

Please let me know in the comments if you have any questions.

Here’s where I purchased the 2 O-rings. http://www.adeptpowersports.com/oem-parts/triumph-o-ring-26-65idx2-62dia-t3600267-part.html

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