/ Register

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

Discussion FZR250 Split crankcases

Discussion in 'Yamaha 250cc In-Line 4's' started by ruckusman, Nov 7, 2016.

Page 2 of 2
  1. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

    Messages:
    3,233
    Likes Received:
    1,423
    Trophy Points:
    918
    Joined:
    Oct 1, 2013
    Gender:
    Male
    Location:
    Narrabeen, NSW Australia
    My Bike:
    Yamaha FZR250 3LN1
    thanks @Linkin - i just shot them a message to see what they come back with, out of interest what did the base gasket set you back?
     
    ruckusman, Nov 10, 2016
    #21
  2. 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
    I think both gaskets were 100 bucks in total. Part number 3LN-11351-00
     
    Linkin, Nov 10, 2016
    #22
  3. driftwood

    driftwood Well-Known Member

    Messages:
    101
    Likes Received:
    40
    Trophy Points:
    213
    Joined:
    May 9, 2020
    Gender:
    Male
    Location:
    melbourne
    My Bike:
    FZR250R
    About now it seems to me that splitting the cases was the easy bit!
    About to torque head down when noticed that camchain couldn't be hooked onto the crankshaft gear. It looks like there's a guide, mine being outside of which, to keep chain in proximity. Curse the FZR400 reassembly page 192 or 4-56 which doesn't mention this issue.
    I'm going to have to re-split, aren't I?
     
    • Bummer Bummer x 1
    driftwood, Sep 24, 2022
    #23
  4. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

    Messages:
    3,233
    Likes Received:
    1,423
    Trophy Points:
    918
    Joined:
    Oct 1, 2013
    Gender:
    Male
    Location:
    Narrabeen, NSW Australia
    My Bike:
    Yamaha FZR250 3LN1
    If it's slipped to the side of the tensioned runner on the inside of the engine, lift the head back off, lift the barrels off and see if you can then move that tensioner back to get the chain onto the gear on the crank

    Might even get to do that without lifting the barrels off
    Then perhaps a small cable tie at the top of the tensioner to keep the chain lined up
     
    • Like Like x 1
    ruckusman, Sep 24, 2022
    #24
  5. driftwood

    driftwood Well-Known Member

    Messages:
    101
    Likes Received:
    40
    Trophy Points:
    213
    Joined:
    May 9, 2020
    Gender:
    Male
    Location:
    melbourne
    My Bike:
    FZR250R
    Really was a post for comic relief. The camchain tensioner has two tangs to avoid it slipping away from cog when untensioned, and also to stop it going back into place when some doofus doesn't know what they're doing.
    Dumb blunder, but when re-assembling upside down the chain is hidden. Shoulda twigged as soon as the barrels slipped down easy, since the lower end of camchain tensioner is constantly pressured outwards by chain on the cog - and it has to be bent inwards.
     
    • Like Like x 1
    driftwood, Sep 24, 2022
    #25
Page 2 of 2

Share This Page