919 Cush Drive - Wrist Twisters
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  • 1 Post By old fart
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post #1 of 10 Old 11-16-2017, 07:45 PM Thread Starter
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919 Cush Drive

Installing new sprockets & doing general inspection/maintenance. With the rear wheel off the bike I can rock the cush drive back & forth due to play on the rubber dampers. Is this normal or should it be tight with no movement? Service manual does not specify.

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post #2 of 10 Old 11-17-2017, 06:29 AM
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Tight
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post #3 of 10 Old 11-17-2017, 07:21 AM
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depends what you mean by "back and forth" do you mean laterally or axially? with the wheel upright and you behind it, side to side (lateral) play is normal because there's nothing capturing the cush drive in that direction. If you mean you're grabbing the cush drive while facing the sprocket and can twist it back and forth in the direction the chain would act on it (axially) then that's a problem.
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post #4 of 10 Old 11-17-2017, 10:09 AM
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i think there was a thread about this where it talked about the little lag between pinning the throttle and having a tiny delay before accelerating, even with the chain at max tension. Given that those things are rubber there's going to be a bit of play.


I just replaced my cush drive when I felt it fairly loose and it significantly reduced the play, but i could still feel it (if i was to be super picky). If you want 0 play upgrade to some race grade cush drive, though not sure if it'd be worth the cost.
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post #5 of 10 Old 11-17-2017, 03:46 PM
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My bike has low km's and the crush rubbers are tight. How many km's on your bike? Pack them out or even better, get new ones.

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post #6 of 10 Old 11-17-2017, 08:01 PM Thread Starter
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23,000 (miles)

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post #7 of 10 Old 11-17-2017, 08:56 PM
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My bike is a 2002 model with 12000 miles on it. The crush rubbers are not super tight but are a good fit. There is no play when wheel is together. I see partzilla has a discount on at the moment and a damper set? is around 24 bucks.

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post #8 of 10 Old 11-23-2017, 06:21 PM Thread Starter
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I'll admit I was skeptical the original dampers could be worn after just 23,00 miles but they sure were. The original dampers allowed a degree or two rotation each way (a guesstimate) & if the wheel was stood vertical the entire cush drive fell out on the floor. Got a new set of dampers from Mr. Honda & those things are tight! No slop what so ever & I even had to spray a little windex on them just to get the cush drive to slip in. Don't know if they dry up & shrink or compress but it is something.
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post #9 of 10 Old 11-23-2017, 10:55 PM
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Have you noticed a difference when riding?
I think age has a lot to do with it. The rubber hardens and doesn't expand back as well after compression. The 919 has a lot of torque, so hard riding would probably make them lose tightness quicker.
How old is your bike? I think I'll keep an eye on mine cause they are 15yrs old.

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post #10 of 10 Old 11-24-2017, 08:26 AM Thread Starter
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It's an 02, unfortunately won't be riding until spring.

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