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sloppy driveline

Started by midlifeduc, September 20, 2008, 08:16:42 AM

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midlifeduc

question, on my 94 900 monster how much slop if any is allowed at the cush drive of the clutch? i noticed my chain moves 1 to 1.5 links at the front spocket when i roll it in gear . ???
94 M900

Rameses

Quote from: midlifeduc on September 20, 2008, 08:16:42 AM
question, on my 94 900 monster how much slop if any is allowed at the cush drive of the clutch? i noticed my chain moves 1 to 1.5 links at the front spocket when i roll it in gear . ???


If I'm interpreting your question correctly, what you're asking about doesn't actually have to do with the clutch.

You're actually talking about chain tension.

That's what would dictate how much the front sprocket turns before rotational force is transferred to the rear wheel.

Did I understand your question right?

midlifeduc

when i looked in the manual it showed a cush drive on the clutch basket. the front sprocket rotates this far before the engine compresion stops it. i havent tore down yet , but was wondering if it is normal or if i have a problem that needs attention. ???
94 M900

ducpainter

Quote from: midlifeduc on September 21, 2008, 07:05:43 AM
when i looked in the manual it showed a cush drive on the clutch basket. the front sprocket rotates this far before the engine compresion stops it. i havent tore down yet , but was wondering if it is normal or if i have a problem that needs attention. ???

It's possible you have a worn cush drive...

there are other things in the transmission that would allow for some slop though.

I'm not sure what you're describing is abnormal.

It's fairly easy to disassemble the clutch hub to check
"Once you accept that a child on the autistic spectrum experiences the world in
a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
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    Ask a mother who gave birth to a stillborn.
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midlifeduc

just thought i would ask. coming from jap bikes that dont do this, i was just concerned. it almost has a jerky feeling at lo rpms. some is the way it runs . sat for awile before i got it. havent had time to do the carbs yet.
94 M900

ducpainter

If it has stock gearing it will feel that way regardless of how tight everything else is.

The Duc doesn't like to run below 3K because of the tall gearing and the uneven firing of the V-twin.
"Once you accept that a child on the autistic spectrum experiences the world in
a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent.”



midlifeduc

thanks for the info. i appreciate it alot . ;D
94 M900

sejman

I think I know what you are talking about.  I'm a new owner too ('01 M900) and was just doing my first chain lube.  I'm lucky that the previous owner installed a center stand - makes it real easy to spin the rear wheel by hand and lube.  But I also noticed how much slop there is if you put the bike in gear (engine off, or course) and roll the wheel back/forth against the transmission and stopped engine.  Only a very small amount of this is chain tension - most of it is coming from the drive train inside the engine.  Maybe this is on purpose - don't know.

I don't think this has anything to do with the rough low-speed "character" of the bike, since the chain/drivetrain is tensioned the whole time if you are going up a slight incline and the bike is still a bit "bumbly".  It sure makes the transition from "on the gas" to "off the gas" abrupt though, especially combined with the major engine breaking.  Coming from a mid-size Kawasaki (small inline 4), this was the biggest adjustment for me.

Howie

A few thousandths of an inch in the transmission can become huge by the time it gets to the rear wheel.  Jack up a drive wheel on your car with it in gear or park and see how much movement you get.

Rameses

Ahhh, okay.  I finally figured out what the OP meant by...

Quote from: midlifeduc on September 20, 2008, 08:16:42 AM
my chain moves 1 to 1.5 links at the front spocket when i roll it in gear . ???


You're talking about rolling the bike forward and backward with the transmission in gear, hand off the clutch lever, and the engine turned off.  Right?

Howie's post above is right on.  This's normal.

ducpainter

Quote from: Rameses on September 22, 2008, 09:19:41 AM
Ahhh, okay.  I finally figured out what the OP meant by...


You're talking about rolling the bike forward and backward with the transmission in gear, hand off the clutch lever, and the engine turned off.  Right?

Howie's post above is right on.  This's normal.
I thought the same thing yesterday... [roll]

http://ducatimonsterforum.org/index.php?topic=11676.msg200363#msg200363
"Once you accept that a child on the autistic spectrum experiences the world in
a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent.”



♣ McKraut ♣

Quote from: Rameses on September 22, 2008, 09:19:41 AM
Ahhh, okay.  I finally figured out what the OP meant by...


You're talking about rolling the bike forward and backward with the transmission in gear, hand off the clutch lever, and the engine turned off.  Right?

Howie's post above is right on.  This's normal.

that's what i thought he was referring to as well.  and +1 on that being normal.
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