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

Project My FZR250 3LN6

Discussion in 'Your 250cc Projects' started by driftwood, May 10, 2020.

  1. driftwood

    driftwood Member

    Messages:
    24
    Likes Received:
    2
    Trophy Points:
    13
    Joined:
    May 9, 2020
    Gender:
    Male
    Location:
    melbourne
    My Bike:
    FZR250R
    Hidey-ho neighbour. I'm working on a 3LN6, just scoping the damage! Carbs are needing a cleanout before it fires up. Sure there'll be more - the fuel tap Off position had a leak, so the eng was lubed by something the consistency of diesel. And black plugs looks like it was ridden that way. Here's my collection of lemons (and yup, the Brumby is included!)

    IMG_20200429_161809.jpg
     
    • Winner Winner x 2
    • Like Like x 1
  2. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

    Messages:
    4,264
    Likes Received:
    2,334
    Trophy Points:
    898
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide, South Australia
    My Bike:
    Yamaha's , 1990 FZR250R 3LN3 , 1986 XT250TS 57R , 1984 IT200L 43G, 1976 IT400C 510
    Welcome to the forum
     
  3. risky

    risky risky

    Messages:
    4,375
    Likes Received:
    1,134
    Trophy Points:
    923
    Joined:
    Nov 4, 2012
    Gender:
    Male
    Occupation:
    risky by name AND actions
    Location:
    newcastle,australia
    My Bike:
    honda ca77, megelli x2,fzr yamaha x 5 ,maxim,cb750.cb600 hornet,zxr250,marusho magnum electra.
    welcome
     
  4. Mike Green

    Mike Green Member

    Messages:
    45
    Likes Received:
    48
    Trophy Points:
    28
    Joined:
    May 9, 2020
    Gender:
    Male
    Location:
    Auckland New Zealand
    My Bike:
    Yamaha FZR250
    Looks like you got a nice one. Do a full service. Especially check the valve clearances. The poor things have a bit of history of being neglected mechanically I think. I have a couple of engines here and used to work in a Yamaha shop for a few years. If looked after I'd expect it to run sweet for years.
     
    • Agree Agree x 1
    • Well said! Well said! x 1
  5. 2valve

    2valve Well-Known Member

    Messages:
    482
    Likes Received:
    179
    Trophy Points:
    248
    Joined:
    Oct 12, 2016
    Gender:
    Male
    Location:
    Glen Innes Australia
    My Bike:
    1985 Yamaha SRX 250
  6. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

    Messages:
    2,243
    Likes Received:
    975
    Trophy Points:
    693
    Joined:
    Oct 1, 2013
    Gender:
    Male
    Location:
    Narrabeen, NSW Australia
    My Bike:
    Yamaha FZR250 3LN1
    Welcome
    A 3LN6 is quite a rare beast

    Interested to see if you can answer one question on the 3LN6 - does it have an oil pressure gauge - just something which I read recently

    BTW for your work/restoration it's worth making your own individual thread so that information and replies don't get crossed over and become confusing
     
  7. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

    Messages:
    9,286
    Likes Received:
    5,469
    Trophy Points:
    1,168
    Joined:
    Jun 14, 2012
    Gender:
    Male
    Occupation:
    Grumpy Old Bastard
    Location:
    North by NW NSW Oztralia - Tamworth
    My Bike:
    *Kawasaki ZXR250C *Yamaha FZR250R 3LN1 *Suzuki GSX250 *Triumph Bonneville 750 T140V *Triumph Daytona 675
    Moved to Projects
     
    • Nice Work Nice Work x 1
  8. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

    Messages:
    4,264
    Likes Received:
    2,334
    Trophy Points:
    898
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide, South Australia
    My Bike:
    Yamaha's , 1990 FZR250R 3LN3 , 1986 XT250TS 57R , 1984 IT200L 43G, 1976 IT400C 510
    • Thanks! Thanks! x 1
  9. driftwood

    driftwood Member

    Messages:
    24
    Likes Received:
    2
    Trophy Points:
    13
    Joined:
    May 9, 2020
    Gender:
    Male
    Location:
    melbourne
    My Bike:
    FZR250R
    Negative oil gauge. I'm only guessing 3LN6 by eng num 1hx340627... affirm the temp gg tho'.
     
    • Thanks! Thanks! x 1
  10. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    4,080
    Likes Received:
    2,693
    Trophy Points:
    923
    Joined:
    Dec 23, 2012
    Gender:
    Male
    Location:
    Thailand
    Home Page:
    My Bike:
    Yamaha FZR400 3TJ1, Honda MC22
    Welcome, not many of those about. Check the carbs to make sure they are 3LN6 before you order any bits and pieces. The needles are held in place differently to all the other models and the slide housings have a sealing ring. https://litetek.co/Carb_Kit_Yamaha_FZR250_3LN6.html Our part SH-002 on this page.
    Motorcycle Spares Warehouse might have Keyster kits for them as well.
    Cheers
    Blair
     
  11. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

    Messages:
    2,243
    Likes Received:
    975
    Trophy Points:
    693
    Joined:
    Oct 1, 2013
    Gender:
    Male
    Location:
    Narrabeen, NSW Australia
    My Bike:
    Yamaha FZR250 3LN1

    Attached Files:

  12. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

    Messages:
    9,286
    Likes Received:
    5,469
    Trophy Points:
    1,168
    Joined:
    Jun 14, 2012
    Gender:
    Male
    Occupation:
    Grumpy Old Bastard
    Location:
    North by NW NSW Oztralia - Tamworth
    My Bike:
    *Kawasaki ZXR250C *Yamaha FZR250R 3LN1 *Suzuki GSX250 *Triumph Bonneville 750 T140V *Triumph Daytona 675
    Oil level sensor is on the 3LN1
    Oil pressure sensor 3LN3 onwards


    CarbNeedleAssembly 6-7.jpg cutaway 1.jpg cutaway.jpg
    float bowls.jpg
     
    • Thanks! Thanks! x 1
    Last edited: May 11, 2020
  13. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

    Messages:
    2,243
    Likes Received:
    975
    Trophy Points:
    693
    Joined:
    Oct 1, 2013
    Gender:
    Male
    Location:
    Narrabeen, NSW Australia
    My Bike:
    Yamaha FZR250 3LN1
  14. driftwood

    driftwood Member

    Messages:
    24
    Likes Received:
    2
    Trophy Points:
    13
    Joined:
    May 9, 2020
    Gender:
    Male
    Location:
    melbourne
    My Bike:
    FZR250R
    My valve clearances are fine, but carb o/haul didn't go so well - first thing I see are hexhead screws over the needle jet corroded thru on a couple. Fallen off at 1 thread point. Think I'd like to hand over for reco.... anyone in Melb do this pls?
     
  15. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

    Messages:
    4,264
    Likes Received:
    2,334
    Trophy Points:
    898
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide, South Australia
    My Bike:
    Yamaha's , 1990 FZR250R 3LN3 , 1986 XT250TS 57R , 1984 IT200L 43G, 1976 IT400C 510
    • Like Like x 2
  16. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

    Messages:
    9,286
    Likes Received:
    5,469
    Trophy Points:
    1,168
    Joined:
    Jun 14, 2012
    Gender:
    Male
    Occupation:
    Grumpy Old Bastard
    Location:
    North by NW NSW Oztralia - Tamworth
    My Bike:
    *Kawasaki ZXR250C *Yamaha FZR250R 3LN1 *Suzuki GSX250 *Triumph Bonneville 750 T140V *Triumph Daytona 675
    Put up some photos of the problems with the carbs so we can point you in the right direction
     
  17. driftwood

    driftwood Member

    Messages:
    24
    Likes Received:
    2
    Trophy Points:
    13
    Joined:
    May 9, 2020
    Gender:
    Male
    Location:
    melbourne
    My Bike:
    FZR250R
  18. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

    Messages:
    4,264
    Likes Received:
    2,334
    Trophy Points:
    898
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide, South Australia
    My Bike:
    Yamaha's , 1990 FZR250R 3LN3 , 1986 XT250TS 57R , 1984 IT200L 43G, 1976 IT400C 510
  19. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

    Messages:
    4,264
    Likes Received:
    2,334
    Trophy Points:
    898
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide, South Australia
    My Bike:
    Yamaha's , 1990 FZR250R 3LN3 , 1986 XT250TS 57R , 1984 IT200L 43G, 1976 IT400C 510
    That diagram ^ is of 1987 2KR carby's, but the same emulsion tube screw is used on both the 2KR and 3LN carbys
    For 3LN6 emulsion tube's they may be harder to find as they're obsolete now

    I reckon this carby kit is for either the 3LN6/7 or the Zeal FZX250 but the seller wont tell me what jet's are in the kit ?
    https://www.ebay.com.au/itm/1-Set-1...899682&hash=item445920fed6:g:n9UAAOSwn2lenUb2

    Zeal carby kit (emulsion tube is different to the 3LN6/7 emulsion tube)
    https://www.aliexpress.com/i/32957697928.html
     
  20. driftwood

    driftwood Member

    Messages:
    24
    Likes Received:
    2
    Trophy Points:
    13
    Joined:
    May 9, 2020
    Gender:
    Male
    Location:
    melbourne
    My Bike:
    FZR250R
    Carb overhaul completed. Still not firing, even with StartYaBastard sprayed into throats.
    Good sparks, and resistance of 33kOhm plug-plug is exactly what the FZR400 coil&leads spec says. I wonder about timing, but can find no info whatsoever on adjusting the slotted screw in the alternator cover - nor where timing marks can be found???
     

Share This Page