/ Register

  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Help My FZR sounds a bit top endy lately

Discussion in 'Yamaha 250cc In-Line 4's' started by richie, Sep 17, 2015.

Page 1 of 3
  1. richie

    richie Active Member

    Messages:
    158
    Likes Received:
    47
    Trophy Points:
    138
    Joined:
    Mar 26, 2015
    Gender:
    Male
    Location:
    waterford ireland
    My Bike:
    yamaha fzr250r
    So its bin a decent while without incident but lately especially when cold my bike sounds a bit tappy. Is this the cam chain or tension I should look into? I read through thread grey import put up is it adjustable without removal? Few other little niggles the bike seems awkward when trying to get a sweet spot when riding slow theres a delay as such and gives a kick as such maybe my throttle cable or me or gremlins im not sure! I have new cush drive chain and sprokets but sometimes when shifting it still a bit harsh :-/
     
    richie, Sep 17, 2015
    #1
  2. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

    Messages:
    6,400
    Likes Received:
    4,788
    Trophy Points:
    1,148
    Joined:
    May 4, 2013
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Tamworth, NSW
    My Bike:
    1937 Royal Enfield 250, CF Moto 250 V5, Honda's XL250, CBR250, FT500 plus a few others.
    Look to your cam chain tensioner first.
     
    Murdo, Sep 17, 2015
    #2
  3. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

    Messages:
    10,929
    Likes Received:
    6,720
    Trophy Points:
    1,168
    Joined:
    Jun 14, 2012
    Gender:
    Male
    Occupation:
    Between a Rock and a Hard Place
    Location:
    North by NW NSW Oztralia - Tamworth
    My Bike:
    *Kawasaki ZXR250C *Yamaha FZR250R 3LN1 *Yamaha FZR400 *Triumph Bonneville 750 T140V *Triumph Daytona 675 *Triumph Tiger 800XC
    Agreed

    Follow the removal/installation process correctly in those threads to check how much there is left on the auto tension rod..... and that it was installed and working correctly beforehand
     
    GreyImport, Sep 17, 2015
    #3
  4. richie

    richie Active Member

    Messages:
    158
    Likes Received:
    47
    Trophy Points:
    138
    Joined:
    Mar 26, 2015
    Gender:
    Male
    Location:
    waterford ireland
    My Bike:
    yamaha fzr250r
    Ok I will do. its not being ridden much lately maybe once a week the weather here is rainy and doesnt help. The good mech I went to ages and ages ago said that it might be stuck between adjustments and to loosen off the two bolts and see if it clicks on. Was very faint noise now its bit louder also one of my plug leads is shorting even after trimming it grrr the bike was going so well! Still need a clutch too :-/ I dont think I would replace the cam chain myself
     
    richie, Sep 18, 2015
    #4
  5. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,737
    Likes Received:
    2,883
    Trophy Points:
    943
    Joined:
    Mar 18, 2014
    Location:
    Sydney NSW
    My Bike:
    FZR250R 3LN6
    If your plug lead is shorting then the insulation is gone, trimming it won't help. Have to replace it.

    CCT, unbolt it and inspect. Is the ratchet fully extended? If so, your cam chain is shot.
    Reset the ratchet to the shortest length, reinstall it and rotate engine by hand. You'll hear the ratchet extending.

    If your clutch is slipping, you can take off the clutch cover and nip up the clutch springs. It's a very dodgy fix though... they're supposed to be at a specific torque, and an even amount of torque is critical.
     
    Linkin, Sep 18, 2015
    #5
  6. richie

    richie Active Member

    Messages:
    158
    Likes Received:
    47
    Trophy Points:
    138
    Joined:
    Mar 26, 2015
    Gender:
    Male
    Location:
    waterford ireland
    My Bike:
    yamaha fzr250r
    It seems to be I could hear it and put my hand on to make sure it was properly seated and I got a zap off it donkey here didnt switch off the engine! ok linkin I will do when weather picks up there is good weather forecast sunday so all going well ill do it then. If the chain is gone ill b heart broken!
    The clutch is slipping but only at the higher end ive been keeping it out of the slip as much as possible to get the thing to last til I can afford a new one!
     
    richie, Sep 19, 2015
    #6
  7. richie

    richie Active Member

    Messages:
    158
    Likes Received:
    47
    Trophy Points:
    138
    Joined:
    Mar 26, 2015
    Gender:
    Male
    Location:
    waterford ireland
    My Bike:
    yamaha fzr250r
    At a bit off a loss with this one. Took out cct and. It was free and 50% out on the teeth some one was at it before and added an extra spring with a bit of a bolt to keep tension. I put it bk together turned it over by hand then started it. Noise still there so loosened two bolts a bit to get an extra click to make sure there was enough tension. Put it back together and noise is still there couldn't be the CCT now? I thought might be plug lead but its on the exhaust side the noise. Bad valve maybe?

    Screenshot_2015-09-21-17-41-26.png Screenshot_2015-09-21-17-41-35.png
     
    richie, Sep 22, 2015
    #7
  8. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,737
    Likes Received:
    2,883
    Trophy Points:
    943
    Joined:
    Mar 18, 2014
    Location:
    Sydney NSW
    My Bike:
    FZR250R 3LN6
    If that's the position of the tensioner it does look about fully extended. How many more teeth are left if you lift up the ratchet and pull it out all the way?

    Springs look fine.
     
    Linkin, Sep 22, 2015
    #8
  9. zixxer

    zixxer Well-Known Member

    Messages:
    457
    Likes Received:
    171
    Trophy Points:
    248
    Joined:
    Jan 26, 2014
    Gender:
    Male
    Location:
    Sydney, Australia
    My Bike:
    zxr250
    you sure its in the top end?, noise seems to travel through these engines very hard to diagnose, try the screwdriver trick to pinpoint where its coming from.
     
    • Like Like x 1
    zixxer, Sep 22, 2015
    #9
  10. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

    Messages:
    10,929
    Likes Received:
    6,720
    Trophy Points:
    1,168
    Joined:
    Jun 14, 2012
    Gender:
    Male
    Occupation:
    Between a Rock and a Hard Place
    Location:
    North by NW NSW Oztralia - Tamworth
    My Bike:
    *Kawasaki ZXR250C *Yamaha FZR250R 3LN1 *Yamaha FZR400 *Triumph Bonneville 750 T140V *Triumph Daytona 675 *Triumph Tiger 800XC
    CCT
    If your not using the correct procedure to remove it you cant determine how much more the ratchet bar can extend

    With the top bolt and 2 springs removed , push the ratchet back in as far as it will go ...... attach to the motor.
    Then when its bolted to the motor u put in the 2 springs in the top and then screw in the top bolt over the springs and tighten..... it will then auto tension.
     
    • Like Like x 1
    GreyImport, Sep 22, 2015
    #10
  11. richie

    richie Active Member

    Messages:
    158
    Likes Received:
    47
    Trophy Points:
    138
    Joined:
    Mar 26, 2015
    Gender:
    Male
    Location:
    waterford ireland
    My Bike:
    yamaha fzr250r
    Sorry linkin that is the fully extended pic my bad :-/ it was only halfway out. On the pic you can nearly see where it was as it goes from blackish to light grey.

    I followed the the CCT guide unbolted middle bolt first so I would know how far out the plunger was. Then the other two. Pushed plunger all the way back refitted then springs and copper washer bolt and turned engine by hand until clicking stopped and once more for luck! Started up still ticky so loosened the two allen keys until I heard a click tightening them up again so theres prob enough tension on the chain now?
     
    richie, Sep 22, 2015
    #11
  12. richie

    richie Active Member

    Messages:
    158
    Likes Received:
    47
    Trophy Points:
    138
    Joined:
    Mar 26, 2015
    Gender:
    Male
    Location:
    waterford ireland
    My Bike:
    yamaha fzr250r
    20150921_162903.jpg Theres a bit of a bolt in the middle of the big spring putting pressure on a smaller spring
     
    richie, Sep 22, 2015
    #12
  13. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

    Messages:
    10,929
    Likes Received:
    6,720
    Trophy Points:
    1,168
    Joined:
    Jun 14, 2012
    Gender:
    Male
    Occupation:
    Between a Rock and a Hard Place
    Location:
    North by NW NSW Oztralia - Tamworth
    My Bike:
    *Kawasaki ZXR250C *Yamaha FZR250R 3LN1 *Yamaha FZR400 *Triumph Bonneville 750 T140V *Triumph Daytona 675 *Triumph Tiger 800XC

    I wouldnt recommend that procedure .... your manually setting it that way

    And get rid of that piece of bolt or wateva it is
     
    GreyImport, Sep 22, 2015
    #13
  14. Joker

    Joker See "about me" for contact details. Contributing Member

    Messages:
    2,737
    Likes Received:
    1,399
    Trophy Points:
    798
    Joined:
    Feb 2, 2014
    Gender:
    Male
    Location:
    Switzerland
    My Bike:
    SV1000SK3
    As has been said push the tensioner all the way in, install it, then put the springs in and tighten the rear bolt. I recommend that you rotate the engine a few times by hand in the forward direction and maybe once in reverse using the bolt on the stator side (RHS sitting on bike) to give it a bit of movement to take up the slack. The last thing you want is it jumping teeth... I suppose you could do it by just starting it up, but I tend to err on the side of caution.

    "ticky" could also be valve clearances. If your CCT is installed correctly I'd be checking those next. The kind of performance niggles you are getting sound similar to mine before I did my clearances, no ticking now and no performance issues anymore so yeh (CCT is fine too, that was easy to check first).
     
    Joker, Sep 22, 2015
    #14
  15. zixxer

    zixxer Well-Known Member

    Messages:
    457
    Likes Received:
    171
    Trophy Points:
    248
    Joined:
    Jan 26, 2014
    Gender:
    Male
    Location:
    Sydney, Australia
    My Bike:
    zxr250
    if you rotate the engine backwards you can over tension the chain and royally f**k it up.
     
    zixxer, Sep 22, 2015
    #15
  16. Joker

    Joker See "about me" for contact details. Contributing Member

    Messages:
    2,737
    Likes Received:
    1,399
    Trophy Points:
    798
    Joined:
    Feb 2, 2014
    Gender:
    Male
    Location:
    Switzerland
    My Bike:
    SV1000SK3
    ...without ensuring the slack is taken up properly...

    Then I agree. I used this procedure when I did the timing on mine and worked fine. I think @Linkin did his differently, installing the chain "one tooth out" on the cam or something... I wasn't comfortable with that procedure, each to their own though.
     
    Joker, Sep 22, 2015
    #16
  17. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,737
    Likes Received:
    2,883
    Trophy Points:
    943
    Joined:
    Mar 18, 2014
    Location:
    Sydney NSW
    My Bike:
    FZR250R 3LN6
    It's the "correct" way according to the manual but all that really matters is that the timing is right and the chain isn't over-tensioned
     
    Linkin, Sep 22, 2015
    #17
  18. richie

    richie Active Member

    Messages:
    158
    Likes Received:
    47
    Trophy Points:
    138
    Joined:
    Mar 26, 2015
    Gender:
    Male
    Location:
    waterford ireland
    My Bike:
    yamaha fzr250r
    I cant take it out now unfortunately I have no gasket goo left to disassemble again :-/.

    I did it that way joker but the thing still ticked afterwords and I brought CCT on a tooth the dogey way I guess to try be 100% sure it wasnt the chain im a bit nervous now that it may be over tensioned. But I never rotated the engine in reverse. Or started it without turning it by hand first.

    I paid 600 euro only 3-4k ago to have them set if there out already I will burn his house down as we have already established he has taken the piss with me.

    Do any of your engines tick? Maybe I should take it for a short drive later and see if it any better
     
    richie, Sep 23, 2015
    #18
  19. zixxer

    zixxer Well-Known Member

    Messages:
    457
    Likes Received:
    171
    Trophy Points:
    248
    Joined:
    Jan 26, 2014
    Gender:
    Male
    Location:
    Sydney, Australia
    My Bike:
    zxr250
    lol yeah he would be taking the piss for 600 euro.

    have you isolated where the noise is coming from at all?
     
    • Like Like x 1
    zixxer, Sep 23, 2015
    #19
  20. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,737
    Likes Received:
    2,883
    Trophy Points:
    943
    Joined:
    Mar 18, 2014
    Location:
    Sydney NSW
    My Bike:
    FZR250R 3LN6
    Has this bike had the valve clearances adjusted? If valves are on the loose end of the spec (which is a good thing) then you may be getting some valve noise.
     
    Linkin, Sep 23, 2015
    #20
Page 1 of 3

Share This Page