85 250r in neutral, but the sprocket still spins?

[DeePa]

I have the whole carrier/axle out of my 250r, and today i figured id fire it up since i installed new reeds and i wanted to smell the beautiful smell of two strokes. I noticed that the sprocket was spinning pretty fast when it was in neutral. I pulled the clutch in, same thing. I took a screwdriver and put it to the sprocket, and it stopped, with a little resistance on teh screwdriver.

Is this supposed to happen? Do i need a new clutch (plates, basket, what?)?

Is this a common thing, and how should i go about fixing it if its even a problem at all?

Thanks for all of your help lately.

Mike

[kb200x]

I am pretty sure this is normal. My 350x does the same thing. I read a post on this awhile back. I am sure someone will post and tell you the technical reasoning for this

[Unclediezel]

Centrifugal force----
Completely normal----I would be worried if it Didnt do that!!!!!

[Red Rider]

Kb is right, this is normal. The technical reason for the condition you speak of is: With the engine running in neutral, all of the gears are still spinning even though they aren't engaged on the mainshaft or countershaft. It's just the friction between the gear, gear oil, & shaft that causes the shaft to spin. As you noticed, it didn't take much effort to stop your countershaft sprocket from spinning. Obviously, there isn't enough friction there to cause the bike to move in neutral when your chain & sprockets are installed.

Unclediezel, I wouldn't chalk it up to centrifugal force though, because it's more along the lines of Newton's first law of motion, which states: Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.

[nouseforaname90]

Yup. When I had the chain off of my R (after only 2 days of having the R, the chain broke!), I just had to fire it up to hear it.. lol.. so I started it up and noticed the sprocket moving. So I was like "WTF?!" and made sure it was in neutral. I then deduced that it must be normal, so I tried stopping it with my foot and it was very easy to stop. Its normal.

[Unclediezel]

oooop's-----

Did I say Centrifugal----????????????

It should have been Inertia-
The moving object remains moving until counterorce is applied---(BRAKES?)

[200xman]

Outboards do the same thing but the term I heard used was parasitic drag. The viscosity of the oil causes the gears to turn with no load on them.

[samster143]

I think you should re-build!!

[DeePa]

ok, fair enough.

Thanks for making me not think i needed a new clutch.

Thanks,
Mike