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

Project FZR fix up

Discussion in 'Your 250cc Projects' started by Yetiburger, Oct 7, 2017.

  1. 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
    Litetek sell new fuel tap viton o'ring's and seal's
    https://litetek.co/Fuel_Tank_O-Rings_Yamaha.html
    Edit, greyimport has already posted this


    Check your fuel level's like advised, prime the fuel pump a few time's (turn ignition key switch off and on) until the fuel pump stop's as soon as you turn the ignition on, then look at the fuel level's
     
  2. Yetiburger

    Yetiburger Well-Known Member Premium Member

    Messages:
    173
    Likes Received:
    46
    Trophy Points:
    213
    Joined:
    Sep 11, 2017
    Gender:
    Male
    Location:
    Christchurch, new zealand
    My Bike:
    yamaha fzr250
    yeah just waiting for my aux tank from india.
     
  3. 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
    and my67XR is the God of Float Bowl Levels for Fizzers, so follow his advice.
     
    • Like Like x 1
    • Funny Funny x 1
  4. Yetiburger

    Yetiburger Well-Known Member Premium Member

    Messages:
    173
    Likes Received:
    46
    Trophy Points:
    213
    Joined:
    Sep 11, 2017
    Gender:
    Male
    Location:
    Christchurch, new zealand
    My Bike:
    yamaha fzr250
    yeah i though i had them all pretty close last time i did them. but i'll go through them again and recheck everything.
     
  5. Yetiburger

    Yetiburger Well-Known Member Premium Member

    Messages:
    173
    Likes Received:
    46
    Trophy Points:
    213
    Joined:
    Sep 11, 2017
    Gender:
    Male
    Location:
    Christchurch, new zealand
    My Bike:
    yamaha fzr250
    ok guys exams are over and i'm back at it. put some fresh oil in the fizzer. checked the float levels (couple were a wee bit low). all looked good so I started it up with the airbox on. didn't need the choke for more than a couple of seconds and it took throttle after not long at all. but its pissing white smoke out the exhaust. could it be dramatically overfuelling? could that be the cause of all the gas in the sump?
     
  6. 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
    White smoke is water, blue/blackish brown smoke is oil/fuel
    Has the water level dropped in the radiator?
    Does the white smoke smell kinda sweet ?

    Take the oil filler cap off with it running, and see if you can smell fuel.
     
    Last edited: Nov 10, 2018
  7. Yetiburger

    Yetiburger Well-Known Member Premium Member

    Messages:
    173
    Likes Received:
    46
    Trophy Points:
    213
    Joined:
    Sep 11, 2017
    Gender:
    Male
    Location:
    Christchurch, new zealand
    My Bike:
    yamaha fzr250
    so i started it again and no smoke? water level was a little bit lower but i did find a leak.
     
    • Like Like x 3
  8. Yetiburger

    Yetiburger Well-Known Member Premium Member

    Messages:
    173
    Likes Received:
    46
    Trophy Points:
    213
    Joined:
    Sep 11, 2017
    Gender:
    Male
    Location:
    Christchurch, new zealand
    My Bike:
    yamaha fzr250
    nope took it for a test ride and its definitely burning something its not suppose to. I did check the oil fill and it was spitting some pretty clear fluid at me. don't think it smelt too much like gas. will take the fairings off again tomorrow and have another look. could fuel be leaking through another way if the floats are working properly?
     
  9. 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
    Leaking head gasket maybe ?
    Sometime's you will see a rusty spark plug electrode when a head gasket goes
     
  10. John t

    John t Active Member Premium Member

    Messages:
    2
    Likes Received:
    1
    Trophy Points:
    73
    Joined:
    Feb 4, 2019
    Gender:
    Male
    Location:
    Hampshire
    My Bike:
    Yamaha Fzr250 3ln
    Hi andy
    My bike is a 3LN stripping off head and barrels do you have any specs my book is in Japanese cheers john t
     
  11. 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
    @John t
    All original documentation and resources for the FZR250 are in Japanese as its a JDM only bike .... and grey imported to other countries

    There are some things translated or references to specs throughout the forum so you just have to search and read , then read and search

    You can use google translate or other OCR software to decipher specific things that are needed from the original documents

    https://www.2fiftycc.com/index.php?resources/categories/fzr250.25/

    https://www.2fiftycc.com/index.php?forums/yamaha-250cc-in-line-4s.95/
     
  12. Yetiburger

    Yetiburger Well-Known Member Premium Member

    Messages:
    173
    Likes Received:
    46
    Trophy Points:
    213
    Joined:
    Sep 11, 2017
    Gender:
    Male
    Location:
    Christchurch, new zealand
    My Bike:
    yamaha fzr250
    ok so I couldn't figure out how to make a new post so i'll post it here. Looks like the FZR needs a bit of work and I wont have the time to finish it due to uni ( which i will hopefully be done with at the end of the year). In the mean time I would like some advice on how to store the bike. Should I full the the tank and emtpy the float bowls?
     
  13. 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
    • Like Like x 1
  14. Andych

    Andych Senior Member Premium Member

    Messages:
    3,205
    Likes Received:
    1,732
    Trophy Points:
    898
    Joined:
    Oct 6, 2016
    Gender:
    Male
    Location:
    Sydney
    My Bike:
    1987 Yamaha SRX250, Honda 1975 CB400F, Honda 1991 250 Spada, Honda CT110 1986 Postie Bike
    Turn the petcock off and run the bike till all the fuel runs out.. then open the float bowl drains just make sure they are empty.. add some Fuel Saver to the fuel that is in the bike.. that should stop it getting manky. If you have paddock stands lift the front and rear as well but a few months shouldnt hurt the tyres too much. You might want to lever the pads back a touch and hook up a trickle charger to the battery.. just to keep it topped up. Oh.. spray some WD40 or Inox onto the forks and any other chrome parts :)
    Good luck with Uni.
     
    • Agree Agree x 1
    • Thanks! Thanks! x 1
  15. Yetiburger

    Yetiburger Well-Known Member Premium Member

    Messages:
    173
    Likes Received:
    46
    Trophy Points:
    213
    Joined:
    Sep 11, 2017
    Gender:
    Male
    Location:
    Christchurch, new zealand
    My Bike:
    yamaha fzr250
    so the battery completely shat pants on me a while ago, and that was the end of things for a while. Manage to get a bit of spare cash from some holiday work and get a new battery. I knew i need to get a smaller battery or relocate it so I could put the R6 rear shock. So i went to the shop to find available options. ended up finding a little lithium battery that is so much smaller and like a 20th of the weight with only 5 less CCA. 20190805_143644.jpg

    Also had a chat with the mechanic at the shop, who thinks some of the problem with the carbs could be the stuffed battery draining power from the coils and blowing out the spark when trying to add throttle? anyway I'll give the battery a charge and put it in and see what happens. I still think ill need to do a fair bit of carb tuning.
     
  16. 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
    A lot of bikes suffer from this problem when cranking. The voltage drop to the coils makes it very hard for them to start when they need their best spark. Some even have the headlights on at the same time which is just plain stupid. Often the engine will catch as soon as you take your finger off the button.
     
    • Like Like x 2
    • Agree Agree x 1
  17. Yetiburger

    Yetiburger Well-Known Member Premium Member

    Messages:
    173
    Likes Received:
    46
    Trophy Points:
    213
    Joined:
    Sep 11, 2017
    Gender:
    Male
    Location:
    Christchurch, new zealand
    My Bike:
    yamaha fzr250
    OK guys I know its been a while since there was any update on this project but a lot has happened in my personal live in the last year. I managed to finish my engineering degree, get a job, move islands and buy a house. Now I have my own shed ( of course not as big as I'd like but bigger than some of the spaces I've seen better bikes built in) so I can really tackle this bike.

    After going through a couple of lithium batteries for some unknown reason ( suppliers says he can diagnose so just keeps replacing the battery under warranty). He thinks it may be a drain. I know this bike has been crashed at some stage and when I got the bike compression tested the mechanic said he turned the handle bars full lock he blew a fuse. I have not been able to replicate this so I am not sure.

    So are reading back through some of the parts of this thread and reading through some other fzr threads on here I going to go back to the start with this bike.

    Once the new battery shows up I am going to start with doing my own compression test
    then I will double check my valve clearances.
    Then I will look at the loom around the head-stem and see if I can find any faults ( not looking forward to this).
    After that I will head back to the carbs and give them another clean out and possibly make a jig to set up the float levels properly.

    hopefully after all that I can get the bike re-vinned and back on the road.

    P.S the moving company destroyed my side fairings in the move so they are currently being repaired by a friend of mine.
    IMG_20200517_204620.jpg
     
    • Nice Work Nice Work x 2
    • Like Like x 1
  18. Yetiburger

    Yetiburger Well-Known Member Premium Member

    Messages:
    173
    Likes Received:
    46
    Trophy Points:
    213
    Joined:
    Sep 11, 2017
    Gender:
    Male
    Location:
    Christchurch, new zealand
    My Bike:
    yamaha fzr250
    Hi guys.
    I know it has been a long time since any progress on this project.
    I finally have a battery after even more dramas with shipping, lost packages etc.
    So I thought I would start with my own compression test. I removed all the plugs (which looked fairly good, they should they are new) and removed the carbs ( I plan to open these up and give them a re clean). The battery was almost fully charged.

    The results are:
    #1 95 PSI
    #2 97 PSI
    #3 110 PSI
    #4 100 PSI

    Now the compression tester I used was not expensive and I don't even think it has a brand on it anywhere. While I was cranking the engine over the pressure build on the gauge wasn't a nice even climb and a couple of cylinders seemed to change final reading depending on which crank it was. Is this normal? could valve clearances be related to this effect or the uneven compression?
    I'm thinking of re checking the clearances next.

    IMG_20200915_203539.jpg
     
  19. Yetiburger

    Yetiburger Well-Known Member Premium Member

    Messages:
    173
    Likes Received:
    46
    Trophy Points:
    213
    Joined:
    Sep 11, 2017
    Gender:
    Male
    Location:
    Christchurch, new zealand
    My Bike:
    yamaha fzr250
    update

    I put oil down the plug hole and re tested

    Results:
    #1 125 PSI
    #2 140 PSI
    #3 140 PSI
    #4 140 PSI

    but now my battery charger has gone dead.

    So would this mean that my rings are shot?
     
  20. 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
    Original compression test done with the throttle plates fully open and the slides propped fully open?

    Or even with the carbs removed altogether?
     

Share This Page