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Thread: Kick start and overflowing help

  1. #1

    Kick start and overflowing help

    Ok, new to the forums so I hope Iím in the right place.
    I have a 2007 model SR400 and sometimes it starts in a few kicks, sometimes it doesnít. So when it doesnít, I do as the manual says -turn key off, kick 4-5 times holding the decompression lever with throttle open, turn back on, try again. Sometimes it helps, sometimes the carb overflows and can't kick start at all. Yes, the choke is open. So is there any tips to prevent overflowing? Or kick start without failing so many times? This bs gets me late to work sometimes, haha.

  2. #2
    Senior Member MadMax's Avatar
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    Which carb have you got and how does the choke operate? (is it a butterfly in the carb throat or an enricher circuit?)

    IIRC those late model carbs are very complicated, might be worthwhile fitting a new float needle but if that doesn't work then consider a swap to something simpler like a Mikuni VM?

  3. #3
    Hi, thanks for replying.
    I checked and it said Mikuni on it, and I believe it’s a butterfly (I think all SR carbs are).
    Right now it starts fine when it wants to (probably because it’s so cold right now). But I’ll take it apart when it doesn’t at all.

    I’m asking what people do to kick start their bike without any trouble. Or is it sometimes normal have trouble starting a carbureted bike? Sorry for the rookie question.

  4. #4
    Senior Member MadMax's Avatar
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    Quote Originally Posted by LeoTehLion View Post
    Hi, thanks for replying.
    I checked and it said Mikuni on it, and I believe it’s a butterfly (I think all SR carbs are).
    Right now it starts fine when it wants to (probably because it’s so cold right now). But I’ll take it apart when it doesn’t at all.

    I’m asking what people do to kick start their bike without any trouble. Or is it sometimes normal have trouble starting a carbureted bike? Sorry for the rookie question.
    There are videos on Youtube on how to start SR's , usually featuring tiny Japanese girls wearing converse shoes.

    The main things to concentrate on are piston position (using kickstart & decompressor) and don't turn the throttle until it's running. If it doesn't start after 2-3 firm kicks, ignition off - choke off and kick it through a fwe times with decompressor held open, then start again.

    SR's are reasonably common in Japan, if there's a biker hangout near you, swallow your pride and ask someone there to show you how, once you've got the knack you'll wonder what the fuss is all about.

  5. #5
    Senior Member gcrank1's Avatar
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    Would you please explain what you mean by 'the carb overflows'.
    Ie, do you have the air filter on, if not are you seeing gas coming out the intake bell?
    Is gas coming out the overflow tube or spigot?
    '81 Yamaha SR500 Caff Racer
    '09 Suzuki TU250X 'The Silent Red Fellow'
    '98 Honda Shadow 750 ACE Deluxe
    In all things maintain your uprightness lest the road reach up and smite thee

  6. #6
    Quote Originally Posted by MadMax View Post
    There are videos on Youtube on how to start SR's , usually featuring tiny Japanese girls wearing converse shoes.

    The main things to concentrate on are piston position (using kickstart & decompressor) and don't turn the throttle until it's running. If it doesn't start after 2-3 firm kicks, ignition off - choke off and kick it through a fwe times with decompressor held open, then start again.

    SR's are reasonably common in Japan, if there's a biker hangout near you, swallow your pride and ask someone there to show you how, once you've got the knack you'll wonder what the fuss is all about.
    Haha, I’ve seen those.
    I’ve heard that turning the throttle after kicking it (to get it started) is bad for the bike, but I do it anyways to be honest. Is it serious, and does it damage the bike?

  7. #7
    Quote Originally Posted by gcrank1 View Post
    Would you please explain what you mean by 'the carb overflows'.
    Ie, do you have the air filter on, if not are you seeing gas coming out the intake bell?
    Is gas coming out the overflow tube or spigot?
    This is just based on what I heard, but when the carb overflows, the spark plug gets wet with gasoline and won’t start no matter how many times you kick. So you have to wait 5mins at least for it to drain. Air filter is on, nothing leaking.
    I’m just figuring out how NOT to do that.

  8. #8
    Senior Member gcrank1's Avatar
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    Well, the carb overflowing 'could' get the plug wet.....but, from your description I would guess the plug is wet because you have flooded it via too much choke; the most common cause.
    So, tell us exactly what the steps of kickstarting you are using.
    ie:
    gas on
    choke on
    key on
    etc.
    '81 Yamaha SR500 Caff Racer
    '09 Suzuki TU250X 'The Silent Red Fellow'
    '98 Honda Shadow 750 ACE Deluxe
    In all things maintain your uprightness lest the road reach up and smite thee

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    Quote Originally Posted by LeoTehLion View Post
    Haha, Iíve seen those.
    Iíve heard that turning the throttle after kicking it (to get it started) is bad for the bike, but I do it anyways to be honest. Is it serious, and does it damage the bike?
    Leo,no its not bad for the bike at all BUT you will wet the plug and you will then be kicking and swearing . DO NOT TRY TO GET IT TO CATCH BY BLIPPING THE THROTTLE !! Heres my technique :-from stone cold- tap on,choke on,ignition on,kick it 3 times maximum..no start ? choke off and repeat,trust me and what the others tell you,leave the throttle totally closed,it will fire. Occasionally after weeks of inactivity I will start off by turning the tickover screw in half a turn.No 2 bikes are the same in my opinion,mine can be a few kicks when cold but after its first run/start it fires up first time or at the most 2nd kick...same rule applies..no throttle blipping.Hope this helps.

    Andy

  10. #10
    Quote Originally Posted by gcrank1 View Post
    Well, the carb overflowing 'could' get the plug wet.....but, from your description I would guess the plug is wet because you have flooded it via too much choke; the most common cause.
    So, tell us exactly what the steps of kickstarting you are using.
    ie:
    gas on
    choke on
    key on
    etc.
    Ah! I didnít know that thereís such thing as ďtoo much chokeĒ. I just heard that it makes it an easier start; makes sense now.
    I do- choke out, key on, find hardest part to kick, kick. No start after a few times- key off, kick 4-5 times holding decompression lever with throttle open, leaving choke out -which I realized what causes the problem.

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