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Thread: Checking sprag clutch

  1. #1
    Evil Twin Ritch's Avatar
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    Checking sprag clutch

    Had a few issues with the starting of my bike recently. Had the horrible grunching noise from the sprag clutch.


    Is there a way to tell if the sprag clutch is worn without stripping the whole thing down ?

  2. #2
    GP Champ NewBoots's Avatar
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    My understanding is, if it's making nasty noises it's pretty much screwed.....what I would say mate is, don't leave it too long before getting sorted, I'd hate anyone to experience what I did when my sprag clutch went bye-bye...finding rather large bits of metal from the circlip in your engine oil is a sure fire way of finding the blood drain away from all but the most important organs of your body!

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    Evil Twin Ritch's Avatar
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    Quote Originally Posted by NewBoots View Post
    My understanding is, if it's making nasty noises it's pretty much screwed.....what I would say mate is, don't leave it too long before getting sorted, I'd hate anyone to experience what I did when my sprag clutch went bye-bye...finding rather large bits of metal from the circlip in your engine oil is a sure fire way of finding the blood drain away from all but the most important organs of your body!


    Ta dude,

    Its only ever made that noise 2 or three times in the 4 years ive had the bike ?

    Once when i first had the bike cos the battery was shagged, and only recently cos again the battery is shagged. Is it a part that goes gradually or will it just stop working one day ?

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    GP Champ NewBoots's Avatar
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    Sounds like you don't have a major problem...mine was making a clicking/whiring noise on a regular basis. I would suggest that when starting you don't rev it up, just let it start on the button, this apparently reduces wear on the sprag clutch. I wouldn't worry too much about it as yet just try & keep the battery tip-top so there's enough juice to turn her over and it shouldn't be a problem!

  5. #5
    Evil Twin Ritch's Avatar
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    Quote Originally Posted by NewBoots View Post
    Sounds like you don't have a major problem...mine was making a clicking/whiring noise on a regular basis. I would suggest that when starting you don't rev it up, just let it start on the button, this apparently reduces wear on the sprag clutch. I wouldn't worry too much about it as yet just try & keep the battery tip-top so there's enough juice to turn her over and it shouldn't be a problem!

    Hoping thats the case !!!

    Just got a new battery and the uprated starter solenoid so im hoping this will help. Am i right in thinking the best way to start a Mille is using the fast idle lever (some people call it the choke ?), and no throttle ?
    Last edited by Ritch; July 4th, 2008 at 03:11 AM.

  6. #6
    GP Champ AusRSV's Avatar
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    That whole sprag clutch mechanism is way scary. What a horrible sight you describe New Boots.

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    One Liter Duc Eater sergi75's Avatar
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    I use the speed-idle for cold starts. By cold starts, I mean until 55c aprox. I never ever touch the throttle when starting the bike and I've noticed that below 55c the bike is a bit reluctant to fire up without a bit of choke because the tick over is too low. I was advised by southercross not to be shy with the start push button and don't release until the bike has fired up. So far so good.

  8. #8
    GP Champ NewBoots's Avatar
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    Quote Originally Posted by sergi75 View Post
    I use the speed-idle for cold starts. By cold starts, I mean until 55c aprox. I never ever touch the throttle when starting the bike and I've noticed that below 55c the bike is a bit reluctant to fire up without a bit of choke because the tick over is too low. I was advised by southercross not to be shy with the start push button and don't release until the bike has fired up. So far so good.
    That sounds fine for the older models, but the newer 03.9 onwards don't have the fast idle feature!!

  9. #9
    carbon kid
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    yup, no throttle turn and use fast idle (which is also an ace 'cruise control BTW!) when it needs it
    CK

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    GP Champ AusRSV's Avatar
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    Quote Originally Posted by carbon kid View Post
    yup, no throttle turn and use fast idle (which is also an ace 'cruise control BTW!) when it needs it
    CK
    i'd rekon that depends on what ya call cruise speed CK lmao

  11. #11
    carbon kid
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    Quote Originally Posted by AusRSV View Post
    i'd rekon that depends on what ya call cruise speed CK lmao

    means you can scratch yer arse with both hands at 165mph on the autobahns

    I wondered how my mate was 'hands off' and still going fer glory at 165 ..til I saw him playing withthe choke(oops I mean'fast idle' lever.
    Ck

  12. #12
    One Liter Duc Eater sergi75's Avatar
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    Quote Originally Posted by NewBoots View Post
    That sounds fine for the older models, but the newer 03.9 onwards don't have the fast idle feature!!
    ooops, I'll put my head in my drawer and ask a colleague to slam it close 10 times...Thanks for the clarification

  13. #13
    GP Champ NewBoots's Avatar
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    Quote Originally Posted by sergi75 View Post
    ooops, I'll put my head in my drawer and ask a colleague to slam it close 10 times...Thanks for the clarification
    Hey man don't sweat it....I was assisting Sharky with his bike a while ago and started fiddling with this 'choke' thingy and thought what a novelty...why hasn't mine got one! Derrr! a bit of an upgrade on the newer models made this obsolete

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    GP Champ MilleBoy82's Avatar
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    how ya getting on Ritch any luck or is everyone still sitting on the side waiting to be fitted? knowing you thats gonna be a yes

    i never knew the newer models never had a fast idle controller, i bet thats a bitch to start then or is it all automatic?

  15. #15
    mark58
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    Quote Originally Posted by MilleBoy82 View Post
    how ya getting on Ritch any luck or is everyone still sitting on the side waiting to be fitted? knowing you thats gonna be a yes

    i never knew the newer models never had a fast idle controller, i bet thats a bitch to start then or is it all automatic?

    New shape the same starting ritual has the Japs, ignition on no throttle one press and away, everything done aotomatically.
    (Till something goes wrong)

  16. #16
    Evil Twin Ritch's Avatar
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    Quote Originally Posted by MilleBoy82 View Post
    how ya getting on Ritch any luck or is everyone still sitting on the side waiting to be fitted? knowing you thats gonna be a yes

    That is a yes !!!,


    Battery is still in its box, relay is still in its box, i will get round to fitting them, weather has been shite so i aint realy pushed myself. I did plan to have ago today, bu twent out with my mates last night and got wrecked. Im feeling like shit and the Mrs is giving me a ear full, only went to a few local pubs, still didn't managed to get in till 5.00am . Im feeling ruff , word of warningto you all, go easy on wray and nephew white rum, i didnt !!!

  17. #17
    gaz
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    One Liter Duc Eater gaz's Avatar
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    the sprag clutch is one thing that scares me. Mine reset its clocks this morining on the way home from work, a new battery has already been fitted and it lives on a optimate

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