Posted by Konrad Viltersten on August 27, 2007, 3:45 pm
I noticed today that when i started the engine, the back
wheel started rotating slowly, at a constant pace. I
stopped it with my foot but as soon as i released it, it
went back to the movement. Of course, the bike was on
the central stand at the occasion.
Is that normal?
--
Vänligen
Konrad
---------------------------------------------------
Sleep - thing used by ineffective people
as a substitute for coffee
Ambition - a poor excuse for not having
enough sence to be lazy
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Posted by Albrecht via MotorcycleKB.com on August 27, 2007, 4:35 pm
Konrad Viltersten wrote:
>I noticed today that when i started the engine, the back
>wheel started rotating slowly, at a constant pace. I
>stopped it with my foot but as soon as i released it, it
>went back to the movement. Of course, the bike was on
>the central stand at the occasion.
>Is that normal?
Yes. Although the transmission shafts have bearings at either end, there are
no bearings inside the freewheeling gears, and all gear teeth are meshed all
the time.
So the viscosity of the engine oil glues the freewheeling gears to their
shafts, and they turn the pinion gears and a tiny amount of power is
transmitted to the output shaft and the rear wheel mysteriously rotates.
However, do not depend upon the transmission being in neutral when you go to
demonstrate this little bit of information to your Pokemon friends...
And never use your hand to try to stop the rear wheel from turning.
--
Message posted via http://www.motorcyclekb.com
Posted by Konrad Viltersten on August 28, 2007, 12:49 am
Albrecht via MotorcycleKB.com wrote/skrev/kaita/popisal/schreibt :
> Konrad Viltersten wrote:
>> I noticed today that when i started the engine, the back
>> wheel started rotating slowly, at a constant pace. I
>> stopped it with my foot but as soon as i released it, it
>> went back to the movement. Of course, the bike was on
>> the central stand at the occasion.
>>
>> Is that normal?
> Yes. Although the transmission shafts have bearings at either end,
> there are no bearings inside the freewheeling gears, and all gear
> teeth are meshed all the time.
> So the viscosity of the engine oil glues the freewheeling gears to
> their shafts, and they turn the pinion gears and a tiny amount of
> power is transmitted to the output shaft and the rear wheel
> mysteriously rotates.
Great! I was affraid that there was something wrong with
the newly obtained bike. I asked a mechanic to come and
look over the machine before the purchase but he never
showed up so i had to trust my limited knowledge and the
honesty of the seller. Not a good combination...
> And never use your hand to try to stop the rear wheel
> from turning.
Why? I used my foot, not hand but still - why not?
--
Vänligen
Konrad
---------------------------------------------------
Sleep - thing used by ineffective people
as a substitute for coffee
Ambition - a poor excuse for not having
enough sence to be lazy
---------------------------------------------------
Posted by Timberwoof on August 28, 2007, 1:55 am
> Albrecht via MotorcycleKB.com wrote/skrev/kaita/popisal/schreibt :
> > Konrad Viltersten wrote:
>
> >> I noticed today that when i started the engine, the back
> >> wheel started rotating slowly, at a constant pace. I
> >> stopped it with my foot but as soon as i released it, it
> >> went back to the movement. Of course, the bike was on
> >> the central stand at the occasion.
> >>
> >> Is that normal?
> >
> > Yes. Although the transmission shafts have bearings at either end,
> > there are no bearings inside the freewheeling gears, and all gear
> > teeth are meshed all the time.
> >
> > So the viscosity of the engine oil glues the freewheeling gears to
> > their shafts, and they turn the pinion gears and a tiny amount of
> > power is transmitted to the output shaft and the rear wheel
> > mysteriously rotates.
>
> Great! I was affraid that there was something wrong with
> the newly obtained bike. I asked a mechanic to come and
> look over the machine before the purchase but he never
> showed up so i had to trust my limited knowledge and the
> honesty of the seller. Not a good combination...
>
> > And never use your hand to try to stop the rear wheel
> > from turning.
>
> Why? I used my foot, not hand but still - why not?
Just too damn many chances for the bike to grab your hand and mangle it
between spokes and stuff like springs, trailing arms, footpeg mounts,
the chain ... Use the foot brake.
BTW, fergoshsakes, NEVER use the engine to spin the rear wheel while you
oil the chain. That chain will eat your hand for lunch.
--
Timberwoof <me at timberwoof dot com>
faq: http://www.timberwoof.com/motorcycle/faq.shtml
It's easy to say a war is so important your neighbor should go fight it for you.
Posted by Timberwoof on August 27, 2007, 10:12 pm
> I noticed today that when i started the engine, the back
> wheel started rotating slowly, at a constant pace. I
> stopped it with my foot but as soon as i released it, it
> went back to the movement. Of course, the bike was on
> the central stand at the occasion.
>
> Is that normal?
Yes.
--
Timberwoof <me at timberwoof dot com>
faq: http://www.timberwoof.com/motorcycle/faq.shtml
It's easy to say a war is so important your neighbor should go fight it for you.
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>wheel started rotating slowly, at a constant pace. I
>stopped it with my foot but as soon as i released it, it
>went back to the movement. Of course, the bike was on
>the central stand at the occasion.
>Is that normal?