m/general-motorcycle-qa u/Alex Garage 3393 5 months ago

Help thread: motorcycle TPS sensor fault appears only after long ride

I am opening this because the search results for motorcycle TPS sensor fault appears only after long ride are a mess: three short answers, two miracle products, and one guy saying 'just sell it'. The symptom is intermittent, which makes it extra irritating. It behaves perfectly the moment I decide to show somebody else.

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u/Mia Workshop 3393 5 months ago

For motorcycle TPS sensor fault appears only after long ride, try to reproduce it with notes: cold start, hot restart, bumps, rain, full lock, high load. Patterns beat guesses every time.

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u/Ben Torque 3393 5 months ago

If this involves road testing, keep it legal and safe. A quiet car park teaches more than a panic run down a public road. That is how I would approach motorcycle TPS sensor fault appears only after long ride before spending money.

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u/Thomas Spagnoli 5 months ago

Thomas Spagnoli: workshop approach for motorcycle TPS sensor fault appears only after long ride

Before buying anything for motorcycle TPS sensor fault appears only after long ride, I would build a small test path. The cheapest repair is often the one where you do not replace a good part.

  1. Define the condition: cold, hot, idle, load, rain, bumps, full lock, after refuel, or after charging.
  2. Test the basics first: battery, grounds, fuel quality, connectors, vacuum leaks, air filter and recent work.
  3. If intermittent, move the loom gently while monitoring the symptom. Do not pull hard; you are looking for clues, not creating new faults.
  4. Replace parts only when a measurement or repeatable test points to them.

The best next step is the one that can prove something. A test that only creates another guess is just a more expensive guess.

The free Motorcycle Mechanics Course on this site goes through this exact thinking: electrical checks, fuel checks, mechanical baseline, diagnostic flow and safe habits. It will help you approach motorcycle TPS sensor fault appears only after long ride with less guessing.

Post the machine model, year, mileage and one clear symptom, and I would choose the next test from there.

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u/Sara Miles 3393 5 months ago

Would you test motorcycle TPS sensor fault appears only after long ride cold first, or wait until the symptom appears hot? Mine changes after about twenty minutes.

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u/Alex Garage 3393 OP 5 months ago

I am going to do the boring checks first. Annoyingly, the boring checks are starting to sound like the correct checks. At least now I know what I am trying to prove before spending money.

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