Motorcycle Club » Star 1100 Classic & Custom

Clunk on Shutoff

22 posts from 14 voices
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  1. Jawman
    #

    2000 V Star 1100 - When I shut off ignition, sometimes I hear a loud clunk as the engine stops. Not always, but most times.

    IS this normal for this bike? I've only had it 2 weeks.

    thanks,

    Jav

  2. FadMan
    #

    Yah, my '03 does it too - like you say, not always, maybe 60-75% of the time. Most likely has something to do with where the pistons are at at the time of shutdown.

  3. jkd4
    #

    Its the crank rolling backwards due to compression and the noise you hear is the starter clutch taking a beating. It is "normal" in that most Ymahas with this set up do it but the clunk is the one way clutch engaging and after a while it will stop working and a new one is in order at the tune of $650ish. I replaced 3 this year and mine is on its way out. Dont worry about it until you hit the starter and all you hear is the starter spinning and not the engine cranking over.

  4. Jawman
    #

    Thanks jkd4,

    Sounds like an expensive fix wen it happens !

    Jav

  5. 1CuzdominFL
    #

    Did mine for right around $300 and a few hours labor

  6. ellcabidan
    #

    Oh Jeez! Do they all do this? (I know mine does.) So, now I'll be cringing everytime I hear this, because I'll know it's one of those "expensive" sounds. I think I was better off just thinking it was harmless.

  7. gewin7
    #

    I have an 05, have never heard this noise before on mine.

  8. khunder102
    #

    Huh. I have an '05 too, 8k on it, and never heard that.

    g

  9. rzchafer2
    #

    Never heard on my 06 and pray I never do.

  10. Jon632
    #

    I get it once in a while on my 01 but it's probably only 20% of the time

  11. wzdartan
    #

    The "clunk" noise that you are hearing when shutting down the motor is the motor kicking back and slamming the starter clutch. It will get worse if let go, and eventually the starter clutch will fail. It has been speculated, and some claim proven that this is a result of the T.P.S. being out of adjustment. I have read that if this is corrected early by virtue of adjusting the T.P.S. the "clunk will diminish or go away.
    The posts I have read on this seem to confirm this fairly regularly. There is a procedure for adjusting the T.P.S. in the Clymer manuals, and for those who do not have a Clymers the problem is also addressed in the Delphi forum K.B.
    The problem seems to affect the V Stars in varying degrees. Some have older bikes, and have never had a problem with it. Some have brand new bikes, and the bikes suffered from the "clunk" when they took delivery of them from the dealership. My bike is a '07 that I purchased new in '08. It has developed a very light and intermitant "clunk" upon shutoff. It did not do this when it was brand new. I have about 3500 miles on the bike now. I intend to check the adjustment of the T.P.S. this winter while the bike is down. I guess I'll see then if it is the culprit.

  12. LiddleBen
    #

    I have an 01 that never does this. However my 03 Classic does it almost everytime you shut it off. I've never had to replace the starter clutch on either one. If it goes out< I hope it is still under waranty for you.

  13. wzdartan
    #

    Some folks with bikes that are barely out of warranty have received partial compensation from Yamaha for parts resulting from this. Lately though, I have read that Yamaha is refusing compensation claims. This is the situation that inspired people to figure out what was causing the starter clutch failures. The T.P.S. being out of adjustment seems to be the most common factor.
    I believe this is also the reason the owners manual states that the throttle should not be touched when starting, or directly prior to shutting the bike down. If the throttle is advanced during either of these situations, the T.P.S. sends a signal to the computer that advances the timing, resulting in motor kickback. The "choke" is actually a throttle advance that does not affect the T.P.S. signal.
    My bike is still under warranty, but I will make sure the T.P.S. is correctly adjusted. With my luck, if I don't, the starter clutch will last for about one week past the warranty lapse and will fail!
    Dan

  14. LiddleBen
    #

    I took in all the info here and I turned down the Idle just a little withe the Big star adjuster under the carbs and now my Classic has stopped clunking. must have been idling a tad high. Oh well go figure. Easy fix!

  15. ritinktouple
    #

    What does t.p.s. stand for??

  16. wzdartan
    #

    Throttle position sensor. It is mounted on the side of the rear carburetor. I would assume the idle setting could affect the timimg advance. The adjustment procedure dictates that the idle needs to be correctly set prior to the T.P.S. adjustment.

  17. wzdartan
    #

    Great tip LiddleBen. I wish I had a tach. on the bike to see where my idle is. Maybe I'll check that before I go through the trouble of trying to adjust the T.P.S. My Classic has a very light "clunk" about 1/3 of the time I kill the motor. My understanding is that sometimes the "clunk" can get so violent that it sounds like someone is hitting the side case with a hammer. I'll have to see if my nephew can borrow a tach. from the dealership he works at.
    Dan

  18. LiddleBen
    #

    Dan, My Classic is the one with the modified engine ie:cams pistons etc. it was obviously idling high and maybe causing the computer or TPS to think the throttle was open more than an idle. Any way, the bike idles very rough and vibrates due to the cams. at low idle there is a fine line between a dependable idle and the engine stalling at idle. I guess the tech that set up the carbs after the build had it idling too hi to forgo the poor idling at low speeds. Seems to be ok now. rode it some and it has not stalled at a stop light or anything.

  19. Bulltok
    #

    2004 vstar 1100 classic over 10000 miles. Never had this happen.

  20. LiddleBen
    #

    Bulltok , where is the pic of your bike at the scenic overlook taken. I travel to P.A. quite often. mostly between h'burg and olean ny on rt 11 ,15 and us6. Just curious. L.B.

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