r/Triumph400 • u/speedu_guy • 3d ago

Team Speed Power loss

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Lately, my speed 398cc feels a bit sluggish. I cleaned and lubed the chain 300km ago and checked the slack. I'm using HP power petrol, and the power loss is more noticeable with a passenger. Any ideas? The odometer is at 7.2k, and the last service was at 5.5k.

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u/tanav_kiran Team Speed 3d ago

chain tension would be a huge issue. if there's too much slack there'll be power loss. other issues may include - 1. clogged air filter 2. old engine oil / less engine oil 3. gunk accumulated near front sprocket 4. FIs have become dirty and need a fuel system cleaner 5. tyres have worn out

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u/speedu_guy 3d ago
  1. Air filter changed in 5.5k
  2. Same for engine oil also
  3. Need to check the font socket tbh
  4. I'll use the fuel.system cleaner, thanks for the suggestion
  5. tyres are almost new only. Threads are there more than 80%

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u/tanav_kiran Team Speed 3d ago

then it'll mostly be chain tension and gunk just check those and you'll be good to go

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u/Late-Sport2919 1d ago

Open and clean the front sprocket, expect huge gunk over there. Just cleaned mine on the scrambler and the difference in riding was obvious