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Clutch burned out from dragging the rear brake at frictionpoint

Discussion in 'Tech Help' started by Franki, Feb 25, 2016.

  1. Franki
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    Franki New Member

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    Hi. I have a new Honda CB300F which has only done 1500kms. I've been having issues with the clutch, where the clutch lever friction point is moving out (tightening) and it turns out the clutch has been completely burned out and needs replacing. I was told by the mechanic that it's because as a new rider I've been taught to ride the clutch at friction point and drag the rear brake to stabalise the bike when slow manoeuvring, however this practice actually damages the clutch. I have done very little when it comes to practicing MOST skills, so really haven't been dragging the brake that much. I'm wondering what other people opinions are of this issue, and if anyone else has experienced it, and what exactly it is that I could be doing wrong for this to have occurred so quickly.
     
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  2. lucifer_mr2
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    lucifer_mr2 Veteran Member Veteran Member Supporter

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    Easy to burn out clutches, especially with the high idle some learners use. Watching how high some learners rev it while slowly moving, it's pretty easy to see why it would burn it out. When moving slowly, the revs on my bike are only just above idle any faster that that and I just let the clutch all the way out. Only clutch I killed was because of a weakness in a particular, unique part of a clutch, not the friction material.
    How high do you rev it and up to what speed do you use the rev, clutch and brake technique?
     
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  3. Franki
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    Franki New Member

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    It's difficult to say, as I haven't attempted any slow speed manoeuvring in months, except for when I leave my driveway, and then I'm generally in 1st gear with the clutch fully engaged (hand off the lever). So I'm really not sure what it is I'm doing/could have done to burn it out.

    The few sessions I did last year in car parks, practicing slow speed stuff, I was going very slowly, barely walking pace for most of it, and being told "more revs" by the various people I was with. I can't really say for sure what the revs were without jumping on the bike and having a look, which I can't do because my bike is at the mechanics.
     
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  4. CT90
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    CT90 Member

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    It might not have had enough play in the cable and it was just slipping all the time, that would wear it out.
     
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  5. chris2000
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    chris2000 Member

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    Don’t listen to all these stay up right ppl. They got no fucking idea.

    When I did my L that is what they thought. Ready position is bullshit. Practice on ur take off.

    Like on red light shift the gear in neutral. And relax put both legs on the ground. It takes 5sec to shift to first gear n find fraction point. Instate of holding your clutch for a minute. Ride smarter

    When you do your MOST Test. Use the reves but let go of the clutch. Use rear break that is all.
     
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  6. CT90
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    CT90 Member

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    What happens if the idiot behind you can't stop? I always keep it in gear and watch my mirrors for idiots.
     
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  7. chris2000
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    chris2000 Member

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    good for you keep doing that lol
     
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  8. Franki
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    Franki New Member

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    My friend kept adjusting the cable/lever for me because the friction point was moving every couple of times I was riding... it was getting tighter, so there would become less slack in the lever or no slack at all. The burned out clutch was apparently causing this.
     
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  9. Franki
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    Franki New Member

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    At a red light, I'll sit in first gear with rear brake on, but with my clutch completely disengaged and throttle off. I don't find friction point or roll onto the throttle until the light turns green. I have no delay in moving off this way, and also not riding the clutch doing this either! I'm in gear almost immediately.
     
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  10. John.R
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    Sounds a bit rough to be honest, but not out of the realms of possibility.

    Lots of people practice this stuff with no dramas, but if it was slightly out of adjustment, or you've really been dragging it, then I can see it burning out.

    Probably worth doing an oil change too, if you're friction discs have worn down that much, there will be a stack of shit in your oil now.
     
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  11. RobBy66
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    Wow. Just, wow. /shakes-head-and-walks-away
     
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  12. Franki
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    Franki New Member

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    The oil was changed a fortnight ago at its first service. I explained the problems I was having with the clutch but they couldn't find an issue and said the oil change might do the trick. They never mentioned anything about the state of the oil or that it indicated a further problem. The issues persisted however, and I took the bike back, they dismantled the clutch, and have told me it has completely burned out and needs replacing - rider error, not mechanical.

    There was maybe one time last year when I went out to practice slow manoeuvring where I dragged the rear brake a fair bit, but I wouldn't say it was excessive. I only went out maybe 6 or 7 times all up, and I struggled so much to do anything at all (even move off) that I ended up just redoing my pre-learners to take the pressure off, and haven't done any slow-speed stuff since. So I don't think I've dragged it that much. My friends who have been helping me learn/practice can't understand how it has burned out so quickly, given how much I've ridden and what I've been doing.

    I'm wondering if I've just had the clutch engaged a bit more than friction point, and that's what has done it.
     
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  13. lucifer_mr2
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    lucifer_mr2 Veteran Member Veteran Member Supporter

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    If it was out of adjustment at the clutch, cable adjustment would of only masked it.
    When you ride, do you rest your hand on the lever at all? Also, who is paying for the clutch?
     
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  14. Miggzie
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    Miggzie Member

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    I think you got a dud clutch mate
    I've done TONS of slow manoeuvring on the rear break & friction point halfway up the rev range on my 47,000km old 2013 CBR500R, I've never had any clutch problems

    You'd have to be doing drag starts bouncing the limiter daily to burn out a clutch that quick
     
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  15. Yedi
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    Yedi Guest

    You are fucking dangerous!

    Do NOT comment on shit you have no fucking idea about. You'll end up getting some poor naïve fool injured or killed. :angry2.gif:

    Can't wait until I hear about you having a serious accident and being hopsitalised... That'll make my fucking year. :lol Only sad part is that you'll find someone else to blame for your own rank stupidity...
     
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  16. Franki
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    SNo, I don't rest my hand on the lever at all. Only time I touch the lever is when I go to pull it in.

    I am supposed to cover the costs of the repair.
     
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  17. Jimmc
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    I would try talking to the Manager, saying that it seems the clutch was a problem from the beginning and that you could not wear out a clutch in that time if there was nothing wrong with the clutch itself. See if they will come to the party, good luck. The mechanic can't say if there was a fault until the cover is off.
     
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  18. supamodel
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    supamodel Secret Aaaaaagent Man Staff Member Moderator Supporter

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    Gets tricky from a warranty perspective btw; clutches (along with brake pads, for example) are consumables and generally aren't covered by warranty unless they practically explode.

    I'm surprised, because it really does take a lot of abuse to properly kill a clutch & the times I saw you practising you weren't. Endless practising or mega mega revs will do it (or loaaaaaads of rear brake, but that'd be pretty apparent too). Lacking adjustment at the top of the travel, even with the lever end fully adjusted, can assist it being unhappy.

    Might be a bit of fine-tuning about the balance of rear brake to revs to amount of load into the clutch.
     
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  19. gazman
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    gazman Member

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    The clutch can be held in for as long as you want. Holding it in doesn't wear the clutch . The clutch wears when it's slipping on the way in and out.
     
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  20. chris2000
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    You know what is dangerous gave ppl licence to ride on one day training. The max speed they teach is 15 Km. without even Explaining counter steer.

    The way they teach to steer is for kids rid push bikes but once ur speed is 60km how you gone steer they don’t say nothing about counter steering n body position. And to get Ur P that Most Test is a joke. Then wait a year and by R1 n kill ur self that is dangerous.
     
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