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  1. cameleon222

    cameleon222 New Member

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    hey guys,
    hope ya'll doing just fine...
    Aight! here it is, comming in a couple of weeks, my first bike ever.
    1988 fzr 250...
    im planning on making some heavy tune-ups when i'll receive it..
    No matter how much a seller can brag about having been a maintenance freak, we actually never know, until we take matters into our own hands.
    since i never had a bike before, id simply like to know some MUST HAVE tools, to help day to day maintenances.
    i don't wanna be stock in the middle of a process, for a lack of tools or instruments.

    the usual stuffs i guess:

    -Sockets set (metric)
    -Set of allan keys (metric)
    -Assorted Screw drivers
    -ring spanners set

    i plan to clean and sync my Carbs,Valves, is a tool such a vaccum gauge reader-indicator a MUST ?
    oh ! and i also wanna get one of those torque wrench so i can get screws back properly (as they should be), lol cause i have some history into breaking bolts and screws.....

    any other suggestion/ideas please !

    P.S: i've searched all over the forum and did some googling,really have no clue how to adjust those valves, neither what tools i should possess...
    any thread with pictures maybe ?!?!

    Anyone know where to find FZR250 torque specifications ?

    Thanks !
     
  2. dave

    dave Well-Known Member

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    With the tools you have mentioned you will be able to do 95% of the jobs on the bike.

    I would not mess with the carbs unless you have a real problem. Always a possibility to make them worse than they are.
    Recommend putting carby cleaner or (fuel injector cleaner) additive in the fuel instead.

    There are balancing gauges available commercially, do a search ( <!-- l --><a class="postlink-local" href="http://fzr250.com/search.php">search.php</a><!-- l --> ) of the site as they have been talked about before.
     
  3. cameleon222

    cameleon222 New Member

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    I just came back from a shop around town, and bought a "vaccum and fuel pressure tester", i was planning to plug it to the carbs 1 by 1, trying to see the reading on the gauge....if one is faulty i will try to fix it, and see maybe my ticking issue should go away....will also put some carb cleaner as u mentioned in the fuel....if after that the problem still occur, i will take off the whole carbs, and clean them.
    desperately, if problems still occur, i think i will next head to the valves check up and sync....
    what do you think ? is it fine this way, to go through an elimination process ?
     
  4. dave

    dave Well-Known Member

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    YOU really need to use a gauge that compares two ports against one another to get a meaningful result, one that is made for the job with the correct damping.
     
  5. cameleon222

    cameleon222 New Member

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    would you know the factory and/or recommended "psi, kg/cm2, mm. Hg," values for the carburators ? ..
     
  6. dave

    dave Well-Known Member

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    I don't think there is any set value as vacuum can vary so much for a lot of reasons. You are only looking for a balance between 1 & 2 and then 3 & 4 then finally 2 & 3..

    try this link <!-- m --><a class="postlink" href="http://www.carbtune.com/">http://www.carbtune.com/</a><!-- m -->
     
  7. cameleon222

    cameleon222 New Member

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    I've seen this on the internet while surfing on the forum, quite interesting tool...
    my question still remains, i understand what u said about the prrcedure to tune properly (1-2, 3-4, 2-3)
    but do i have tune them all regarding the highest value, or lower one ?? that's what im asking for...
    what could happen if i turn all of them into the highest rate available with the screw , etc....?
    thanks for the infos !!!!
     
  8. brad1

    brad1 New Member

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    I have a carbtune II and synchronised so many bikes now from FZR's, dukes, CBR2fiddys, to late model gixxers, CBR750's, blackbirds, FZ1's...

    There is no value to sync to, rather balancing all carbs. One carb will be fixed (usually carb 3) so all others tune to it. Spend the extra few dollars and get the 4 barrel/ guage tuner as it makes it so much quicker and easier, and therefore more chance of doing it regularly. Once you know how to, the process should take you around 30 minutes total. Hint- put a longer fuel line from your tank, so you can prop it up nearby, alternatively buy a small feeder tank for when you are balancing. There are more adjustments on carbs but they come down to someone who knows what they are doing. There is a fair bit of info on this site from years ago.

    Valve clearances are a pain, and time consuming. But if you are thinking of doing them then do them first. To find out easily if they are likely within spec, if you can find someone with an electronic vaccuum guage (like vaccuum mate) they can run the bike and tell you pretty definitively whether valve clearances are in spec, carbs are operating correctly, compression is ok etc etc. But finding someone with this is tricky- as most mechanics dont understand the more technical tools. You will need a set of feeler guages to check valve clearances. To inspect and adjust isnt terribly difficult providing you are mechanically competent, or experienced, but it is a lengthy and tedious process, including cams out.

    There is so much that can be done, including grease points in swingarm pivot points, head stem bearings, wheel bearings, fork oil, brake pads & fluids & braided lines, headlight bulbs, upgrading earths.....all depends how far you want to go. I've gone almost right through a 1994 ZX9r, spent a fortune and a shitload of time- its easy to do....

    cheers
     
  9. dave

    dave Well-Known Member

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    Syncronising or balancing the carbs is all about getting the butterflies of each carb to produce exactly the same opening at each carb so that each piston is doing the same amount of work. ( Fuel volume adjustment )

    This is mainly affects idle and low throttle openings as the vacuum is greatest at idle, and a small change of relative butterfly angles causes a big change in airflow. Vacuum is lowest at wide open throttle and so the percentage difference in airflow is less with any butterfly mis-alignments..

    The idle mixture screws are about getting the correct mixture to the cylinders for correct idling ( Fuel ratio adjustment )

    I hope that helps with your understanding of the process..
     
  10. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Screwdrivers, get the right one

    Japanese motorcycles do not use phillips screws. They use JIS (Japanese Industrial Standard) cross head screws. If you try to use a phillips screwdriver then it will cam-out and you will not be a happy camper. Then, God forbid, you might go onto an internet forum and complain. You need to buy a JIS crosshead screwdriver. Please refer to the table to select the correct size screwdriver.
    cheers
    Blair

    [​IMG]
     
  11. scootazR4gurlz

    scootazR4gurlz New Member

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    Id say the best tool to have is money
    in your wallet, small mods are easy, but setting up the bike on your own can be down right
    frustrating, so just pay hence the money hehehehehe
     

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