Triumphrat

kidkazi · 07-08-2007

hey guys,

just a quick question. i noticed something yesterday while moving my bike backwards down hill and was wondering if it is normal.
okay. so, i found out that if in neutral, the bike moves very easily with no friction whatsoever. now, i tried putting it in first and held in the clutch all the way in to the grip and noticed that the bike had friction while moving backwards.

is this normal and is there a reason for this? or does that mean that my clutch is not disengaging all the way (hope not). :???: Everyone give it a try! :razz:

raproe · 07-08-2007

The clutch is wet and what you feel is the oil drag between the plates. When the oil is cold it is really noticeable.

Rich

mecscc · 07-08-2007

+1

Monte

Hedge · 07-08-2007

Raproe - would that be the same principle when I first start my bike and it is on the senter stand in neutral - the rear wheel slightly spins? If so - that would explain that!

Baltobonneville · 07-08-2007

Hedgefundgeek: Yes.

kidkazi · 07-08-2007

Quote:

On 2007-07-08 14:46, raproe wrote:
The clutch is wet and what you feel is the oil drag between the plates. When the oil is cold it is really noticeable.

Rich

thanks rich, you genius.

merlin · 07-09-2007

Hedge geek
With the clutch released (no squeza da handle) and in neutral, the engine is spinning the entire clutch assembly, which in turn is spinning the tranny input shaft, which is spinning all the gears since they are constant mesh. The only thing NOT turning is the tranny output shaft because you are in neutral and so no dogs are engaged to drive that shaft (no gear selected) However, the gears are spinning around that shaft, spinning freely, not mechanically locked to it. There is enough friction transfering to the output shaft to turn it if there is no resistance. So the rear wheel turns slowly.
And yeah, raproe's point is that in neutral turning the rear wheel (manually pushing the bike, power off) is easier than in-gear-but-clutch-in because now you are running the whole scheme backwards. In neutral, you don't have to turn the clutch plates at all. The wheel turns, the chain and tranny output turns, but nothing else turns because no gear is dogged to the shaft. The shaft turns freely. But in gear with the clutch pulled you must also turn all the gears and one set of plate which are very close to or actually in contact with another set of plates that are static because the engine is not turning.
Whew, follow that?
Lets just say its easier in neutral and leave it at that. :???:

CAPTDON · 07-09-2007

Beware backing a Bonne w/ the stand down!!

2112 · 07-09-2007

Quote:

On 2007-07-08 23:00, merlin wrote:
Hedge geek
With the clutch released (no squeza da handle) and in neutral, the engine is spinning the entire clutch assembly, which in turn is spinning the tranny input shaft, which is spinning all the gears since they are constant mesh. The only thing NOT turning is the tranny output shaft because you are in neutral and so no dogs are engaged to drive that shaft (no gear selected) However, the gears are spinning around that shaft, spinning freely, not mechanically locked to it. There is enough friction transferring to the output shaft to turn it if there is no resistance. So the rear wheel turns slowly.
And yeah, raproe's point is that in neutral turning the rear wheel (manually pushing the bike, power off) is easier than in-gear-but-clutch-in because now you are running the whole scheme backwards. In neutral, you don't have to turn the clutch plates at all. The wheel turns, the chain and tranny output turns, but nothing else turns because no gear is dogged to the shaft. The shaft turns freely. But in gear with the clutch pulled you must also turn all the gears and one set of plate which are very close to or actually in contact with another set of plates that are static because the engine is not turning.
Whew, follow that?
Lets just say its easier in neutral and leave it at that. :???:

Excellent explanation.

Hedge · 07-09-2007

Agreed - just a plain out Clear-Cut explanation that can be easily understood. Great Job and thx!