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wont start!

Discussion in 'FZR250.com - Archives' started by Dan, Apr 29, 2006.

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  1. Dan

    Dan New Member

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    Went to start the bike this arvo, and she started as per normal, i had the choke on, and thats normally enough to get her going from a cold start, but after a few seconds she died, i figured i didnt give it enough throttle, so i tried again but she wont start! when i first bought the bike and got it home from perth (3 hour drive on a trailer) she did the same thing, just tiked over allmost starting (one cylinder firing occasionally) and just not going, i managed to get it started a few days later by putting fuel directly through the top of the carbies... tried doing that this arvo but nothing!

    any ideas? i started the bike last night, and just warmed her up, didnt ride her, would that have gummed up the plugs (glazed?)
     
    Dan, Apr 29, 2006
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  2. shandu

    shandu New Member

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    sounds like fouled plugs. take out the plug and clean them. before reinstalling them check to see if you have a spark from each of the spark plugs on each ignition lead.

    If you have a spark and its blue you have a good spark. reinstall them and try again with out the choke and gas. it should fire.


    These bikes foul they plugs very easily especially on start ups
     
    shandu, Apr 30, 2006
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  3. dave

    dave Well-Known Member

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    As well as a plug check do a compression test, check the valve clearances.
    Also, I found my bike did not start well when using the choke until I increased the idle speed adjuster. I still have to give it a little bit of throttle initally for 5 seconds or so, but after that it just PURRS..
     
    dave, Apr 30, 2006
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  4. bombermanx

    bombermanx New Member

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    When you restart it and it wants to fire but died, then it sounds like it's flooded. Did you have the choke pulled when you try to restart it? that will dump a lot of fuel in and only small amount of air. Try to wait for a while before restarting to get the fuel to disipate a bit, and have the choke off.

    if you are unsure if it's flooded, then the next time it dies after you start it, and it won't fire back up. Take a look at the plugs, it will be wet with fuel if it is.
     
    bombermanx, Apr 30, 2006
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  5. Dan

    Dan New Member

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    yup, i tried waiting for 6 hours, still nothing, i tried turning the fuel tap to off and running it for 30 seconds, turned it back on, fuel pump back on, nothing... managed to run the battery down trying, so its been on charge, and i will take the plugs out after work tomorow... well worth doing a spark check i think, especially considering all the other problems i have had...
    will post again once ive checked it all out
     
    Dan, Apr 30, 2006
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  6. ACE

    ACE Active Member

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    have/when did you put new plugs in I think it's ment to be done every 6000km
     
    ACE, May 1, 2006
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  7. Dan

    Dan New Member

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    i put the new plugs in about 2 weeks ago (150 kms?)

    took 3 of the 4 plugs out this arvo (trying to beat the sun for a ride after work) and they were all very black! so i gave them a good wipe (didnt have a wire brush handy) and put them back in, not a whole heaps better, it got a little closer to the point of starting allmost running, but just didnt make it <!-- s:( --><img src="{SMILIES_PATH}/icon_sad.gif" alt=":(" title="Sad" /><!-- s:( --> i checked the spark from one of them, and didnt think about it properly (yes i held the plug and the bike :p so there is defiantely a spark :p)

    i took the fuel line off directly before the carbies, and checked there was a flow with the fuel pump on - definate flow.

    i even put fuel directly into the carbies again, fuel, spark, air...??

    i guess im just going to have to take off the clothes, and carby and see if i can see something amis? i dont have a compression tester, but i do have a torque wrench (i hope its not the same thing!) can i test it with that? do i have to do much dismantling to check valve clearances? i am sitting my test in two weeks, so hopefully i can get it going soon! (im not going to sit the test on my bike tho, i rekon they would take one look at me and find any possible reason to fail <!-- s:D --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt=":D" title="Very Happy" /><!-- s:D --> :p)
     
    Dan, May 1, 2006
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  8. shandu

    shandu New Member

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    use a wire brush and clean them properly and before you istall them turn over the engine a coulpe of times without the spark plugs and get some of the fuel out the cumbustion chamber.
     
    shandu, May 1, 2006
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  9. koma

    koma New Member

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    A can of Aerostart or the cheaper alternative 'Start Ya Bastard' might be a good idea if it just needs a bit more encouragement. I've seen many a stubborn bike crank over with the help of the previously mentioned products, and at ~$15 a can it might just give you that little bit extra help.
     
    koma, May 2, 2006
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  10. hainerob

    hainerob New Member

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    I have previously used WD40 or Degreaser to start engines ($2 a can for the cheap stuff)... these tend to work alright too (Although I dont know how good they are for the engine)...
     
    hainerob, May 2, 2006
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  11. ACE

    ACE Active Member

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    how meny k's on the bike and like shandu sead turn the motor over with the plugs out just make sure that its all clean. What temp plugs are u runing and are thay what the bike had in them when you got it and what are the gaps.
    Start ya Bastard is a good for this type of prob if all it is that the bikes flooded
     
    ACE, May 2, 2006
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  12. Dan

    Dan New Member

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    they are no8's, same as the plugs that were in the bike originally, i will take all the plugs out and run the bike, make sure shes clean, give em a good scrubbing and see if that cant encourage her to kick over
     
    Dan, May 2, 2006
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  13. Dan

    Dan New Member

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    ok the plugs are CR8E, ok i took all the plugs out, and they were very oily (black and wet) so that definately wouldnt help, cleaned them with some carby cleaner and a very light going over with wet and dry (note very light) and they looked reasonable, and i thought while im at it, lets check the spark without electricuting myself! so put the plug in held it next to the bike, and nothing! they could only be encouraged to spark when you took the base of the plug a short distance away from the bike (2-5 cms?)
    hrmmm ignition problems?
     
    Dan, May 2, 2006
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  14. Dan

    Dan New Member

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    ahhh another thought, i was reading a post by someone with a similar problem, and carbon buildup on the valves was mentioned, due to running at low rpm, the bike hasnt had a good run for prob 2 weeks, cause im a learner, and i take the bike myself to a local couldersack (round the corner) and really dont want neighbours dobbing me in due to the fact they think im speeding cause my bike sounds like a rocket (ok so 16k in 2nd might be speeding <!-- s:D --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt=":D" title="Very Happy" /><!-- s:D -->) but thats not the point! how do i check my valves? also i dont have a compression tester, is there another way of checking the compression (im sure i can find a friend with one)
     
    Dan, May 2, 2006
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  15. Ciaran

    Ciaran New Member

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    Is the threaded part of the spark plug earthed to the engine block while you are testing it?
     
    Ciaran, May 2, 2006
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  16. Dan

    Dan New Member

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    yup, it is now sparking happily, probably good for all those carby cleaner addicts to know, dont use to clean spark plugs :p the plugs were actually sparking inside themselves, cause of the carby cleaner, so i found after a good soaking in wd-40 and a good clean they work lurvely...

    i tried turning over the bike, and it wouldnt start without the choke, and with the choke i got it running for a second, and tried twisting the throttle a little, but instantly died, kept turning her over after that, and there was a quote "MASSIVE" backfire, with suitably sized flame to suit <!-- s:D --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt=":D" title="Very Happy" /><!-- s:D -->:D:D

    ok so air, fuel, ignition its all happening, mix?? how could this change over night? also checked the oil, it looks pretty black through the sightglass, and is just under half way when the bike is level, is this the right amount? im definately thinking its time for an oil change i have no clue when it was last done!
     
    Dan, May 3, 2006
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  17. ACE

    ACE Active Member

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    didi you put the leads back on right
     
    ACE, May 3, 2006
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  18. shandu

    shandu New Member

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    i just started my bike today after 7 months and the engine is busted lol well you guys would remember me saying i got into an accident and the valve cover got damge real bad.

    any after some choke and constan turnniong over she finally started boy you shoul see the oil spitting out of the valve cover man it made me feel good that my engine was still kicking. <!-- s:roll: --><img src="{SMILIES_PATH}/icon_roll.gif" alt=":roll:" title="Rolling LoL" /><!-- s:roll: --> i only let it idle for like 5 seconds with the choke on then stopped it took off the choke and started again. MORE OIL hahaha. spitting all over th place but like just for 6 seconds then i shut it down again.

    BIG TIP WHEN STARTING WITH THE CHOKE NEVER GIVE ANY THROTTLE VERY BAD.


    all i am saying if mines started yours should start. cheers

    PS I NEED A VALVE COVER
     
    shandu, May 3, 2006
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  19. Dan

    Dan New Member

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    yeah i dont understand it, but i am getting a breathing noise coming from cylinder 4 (sigh? i dunno hard to explain) when u stop turning it over (just for a second) tried spraying wd40 whilst turning her over, and it just backfired!

    i have the day off tomorow so its a good chance for some serious surgery, is it worth checking the valves/ clyinders/watever? if so can someone direct me to some good posts explaining this, or explain it to me!

    thanks
     
    Dan, May 4, 2006
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  20. Dan

    Dan New Member

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    hrm ive had the bike apart, even reopened the carbies, and all seems well... i noticed that there was some small black particles going down into the valves (i think fuel hose, something rubbery) so perhaps this is causing the valves to not seat correctly?

    even so, it should runnning or firing properly anyway....
    i rechecked the spark plugs and leads, and they are not sparking properly, the wil only spark when held 2-3 cms away from the bike frame (the threaded part that is) and when put on the frame no spark watsoever... wat could the problem be and what is the solution?
     
    Dan, May 5, 2006
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