Bearing noise?

Discussion in 'Mechanics Garage' started by anth_85, Aug 5, 2022.

  1. anth_85

    anth_85 New Member

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    My 2003 VFR is making a noise on power.

    - It is not there when revving the engine in neutral
    - It is not there when coasting alone off the power at any speed
    - It is not there in first gear
    - It is there in 2nd through 6th when on the power and moving, noticeable from about 2800rpm onwards
    - It sounds like a bearing and gets faster with higher revs I think
    - Cam chain tensioners were changed with genuine Honda ones very recently

    I am really struggling to narrow it down with it only doing it when moving. I presume it is not the engine since it doesn't do it stationary. It's not the chain or wheel bearing since it doesn't do it when coasting. Exhaust is fine with no leaks. I can only guess at something in the gearbox, but I really don't fancy aimlessly taking that apart. Any ideas?
     
  2. airwalk

    airwalk New Member

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    It’s possible for a drive(countershaft) sprocket to be worn(“hooked”) in such a manner/degree that applying throttle & accelerating causes this kind of symptom. Almost hard to see unless comparing to a new sprocket, surprising how fussy chain& sprocket dimension really are...
     
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  3. Thumbs

    Thumbs Member

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    ^^^^ My first thought was the chain or sprocket
     
  4. anth_85

    anth_85 New Member

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    thanks, it's done 12,000 miles since the chain and rear sprocket was changed. I was thinking of changing it. The kit didn't come with a front sprocket so that maybe hooked. The rear one certainly doesn't look like it. The main issue for the bike was the UK lockdown. I put it away in the garage thinking I'd be back on it in a couple of weeks, but it sat there for 18 months and wasn't put away properly, totally my fault. So I am not sure if that has dried the chain out. It was changed 4 years ago.

    I just thought it odd how it doesn't do it at all in first gear.
     
  5. squirrelman

    squirrelman Member

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    unless an oem chain was badly rusted it shouldn't need replacement until after 20,000 miles.
     
    Last edited: Aug 5, 2022
  6. Thumbs

    Thumbs Member

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    At a guess I'd say the chain has developed a tight spot from being stood or it was getting worse and you didn't notice the noise increasing before it was left
     
  7. anth_85

    anth_85 New Member

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    it's done 12k, but I do think sitting unused probably has affected it's life. I am going to order a replacement chain with front and rear sprockets. I am away for the next few weeks, so I will hold off ordered one for now. This is what I was looking at, seems decently priced

    https://www.sportsbikeshop.co.uk/motorcycle_parts/content_prod/73258
     
  8. squirrelman

    squirrelman Member

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    ^^ no name chain, i'd look elsewhere.
     
  9. anth_85

    anth_85 New Member

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    ok, not sure where to go for something better in the UK? What brands should I be looking for?
     
  10. squirrelman

    squirrelman Member

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    DID RK EK
     
  11. anth_85

    anth_85 New Member

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  12. squirrelman

    squirrelman Member

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    both are good, but the better one is made in japan. :cool:
     
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