A short lived joy
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Thread: A short lived joy

  1. #1

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    A short lived joy

    Well i finally got my redbird back on the road and it was handling beautifully, a joy to ride, really felt nimble and quick to turn, leaned lovely.
    And then....
    I heard a knocking noise..
    Which is only there when it comes on power about 3.5 - 4,000 rpm
    Seems to be coming from mid/top end, rather than big end knocking.
    Its present regardless of clutch and only under load.
    Whipped the fairings off again and rechecked the balance shafts and the cam chain tensioner (fitted new by previous owner and basically zero milage.
    So looks like a rebuild.
    This sucks big time, i have sorted soo many issues with this recently acquired machine I've hardly managed to ride it and just as thought I'd finally sorted EVERYTHING "boooom" first good test ride and this happens.
    Just prior to this knocking, i heard a loud squealing noise which changed pitch. It went above 2k rpm and was only present for a short time, which led me to check the balance shafts. But the balance shafts was a totally different noise. This noise was LOUD and squealy.
    Maybe the prelude to what sounds like a 'small end' failure?
    Anyone had an experience similar to this?
    Thank god i didn't sell the Triumph (ST955i) Good old dependable Triumph, on 66,000 miles and still pulls as strongly as the day it was built. I was totally prepared to sell it as soon as this beautiful sexy red bird came along 😁

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  3. #2

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    Re: A short lived joy

    Are you SURE the CCT was changed, got any proof? Try another before anything else. Got one here.
    carpe diem

  4. #3

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    Re: A short lived joy

    Pretty sure it's not the CCT.. No proof, but it looks new and i put a screwdriver in the slot whilst it was running and it seemed to be working OK.
    This noise is quite a loud and definite 'knock'
    I recorded it, but unfortunately its in 3gp file format(with no option to change)
    Installed another sound recorder which saves in MP3 so will record it again tomorrow and upload. Maybe you would be able to tell? Its only present once the power comes on and sounds awful :/ like engine failure awful

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  6. #4

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    Re: A short lived joy

    Sounds like someone who isn't a good mechanic rebuilt it themselves to save money and messed up. It happens all the time speaking from a dealer point of view.

    Or one or more rod bearings is shot, but you said top end... it can be hard to tell sometimes. Sorry but the only thing I can suggest is to stop running it and take it apart.

  7. #5

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    Re: A short lived joy

    Camshaft?- if rebuilt dry, squeal could have been one picking up?
    The answer is 42

  8. #6

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    Re: A short lived joy

    To be honest I think you might be right on the money there..
    There are new gaskets all round, so maybe p.o went in there and from the rest of the bike, his mechanical knowledge was not amazing..
    I only noticed the new sump gasket last night as i was going around with the listening stick.
    I think it is the Conrod>piston/gudgeon pin bearing/s by the sound.
    Its difficult to tell. But yes, its parked up now. Unfortunately I don't have any covered space to take it apart, which I'd really like to do.
    The bikes only on about 36k. It was sat up for a few years then it was refteshed.
    The last MOT says 29k in Nov 07
    I've ridden it about 400 miles with no problems (although i thought I heard a squeal one time, but its difficult to tell with helmet on/air noise/ loud exhausts and its been making good power.
    The knock has literally just happened after I've sorted all the niggles out

  9. #7

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    Re: A short lived joy

    The squeal was very strange. Seriously loud and changed pitch. Eaxh time it's not lasted long and only present at certain revs.. A dry squeal. The sort of squeal that makes engineers cringe!
    I thought maybe I'd tightened the chain slightly too much and it was the output shaft, so redid that and pulled the front sprocket, cleaned and regressed everything in the vain hope it would sort it..

  10. #8

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    Re: A short lived joy

    Do you think it's possible to drop the sump and pull the pistons with the engine still in the bike?

  11. #9

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    Re: A short lived joy

    Quote Originally Posted by MajorWolf View Post
    Do you think it's possible to drop the sump and pull the pistons with the engine still in the bike?
    Pistons can not come out the bottom, only way to work on this thing properly is with the engine out, which is not the end of the world job wise. I've done it twice in the last 18 months.

  12. #10

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    I have a complete injection engine in my garage it's low miles apparently it was smoking so the head was removed I've inspected it and can't see any reason it was burning oil any parts you want let me know I can do them cheap as chips the only parts missing are clutch and cases
    MajorWolf likes this.

  13. #11

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    Re: A short lived joy

    Im wondering what could have caused the top ends to fail.. and if the squealing is connected.. Maybe Oil pump.. do they squeal when on way out?
    Unfortunately its taken up so much time lately, that i think it's just going to have to either sit there till i can do something about it, or take it to a bike shop which would be ££££ i suspect.
    I would like to rebuild it myself, as at least i would know what's there and everything would be done spot on, but just haven't got any covered area or even space to rebuild the engine once its out as my workshop is rammed, and there is too much grinding dust/metal filings/crap flying about!
    Really must make that bike shed..

  14. #12

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    Re: A short lived joy

    And what's wrong with the kitchen table?
    Dishwasher brill 4 degrease 2
    MajorWolf and Test_Pilot_Bob like this.
    The answer is 42

  15. #13

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    Re: A short lived joy

    The first time I just brought the motor inside, I mean I wasn't using the dining room for much anyway.

    On the plus side my mechanical skills, though still lacking are much better than they were 5 yrs ago. I do have many bike mechanics to rely on for help , kind of a big plus being in the biz.

  16. #14

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    Re: A short lived joy

    Quote Originally Posted by Krisbiker2 View Post
    And what's wrong with the kitchen table?
    Dishwasher brill 4 degrease 2
    I always put stuff in the dishwasher prior to the ultrasonic cleaner. Once got a rear wheel in there.
    carpe diem

  17. #15

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    Re: A short lived joy

    Quote Originally Posted by Krisbiker2 View Post
    And what's wrong with the kitchen table?
    Dishwasher brill 4 degrease 2
    i was actually considering the kitchen table!! Hmm life could be much simpler being single
    Think i may have to make room in the house and then lock the door so my 2 year old son can't get in there!! He just can't help but pull things apart and try putting them back together in the wrong places (bit like the P.O of my bike )

    Is getting the engine out a one man job?


 
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