front sprocket rattle

[RickSkye]

Strangest thing happened.

I got a rattle that I put down to the chain being dry, it didn't look dry so I cleaned the chain and re oiled it. Still got the rattle.

Took the front sprocket cover off, then slackened the chain so I could check the sprocket. It was very slack on the splines. Cold shiver down spine as I thought the spline was knacked.

Took the sprocket off and was met with a rusty, watery sort of mess on the splines and on the center of the sprocket.

Cleaned it all up and tried a new sprocket (I got a chain and sprocket ready as I have done 12000 miles), the new sprocket fitted perfectly.

Examining the inside splines of the new and old sprocket, it was clear, to the eye that the old splines were very badly worn.

TF that the spline was ok.

Any how, new sprocket fitted AND GREASED, and now the chain is re adjusted, it is almost back to the new setting.

Just for info, chain and sprocket have been on since new.

Might be worth checking yours and putting some grease in there.

[StumpyFingers]

Strangest thing happened.

I got a rattle that I put down to the chain being dry, it didn't look dry so I cleaned the chain and re oiled it. Still got the rattle.

Took the front sprocket cover off, then slackened the chain so I could check the sprocket. It was very slack on the splines. Cold shiver down spine as I thought the spline was knacked.

Took the sprocket off and was met with a rusty, watery sort of mess on the splines and on the center of the sprocket.

Cleaned it all up and tried a new sprocket (I got a chain and sprocket ready as I have done 12000 miles), the new sprocket fitted perfectly.

Examining the inside splines of the new and old sprocket, it was clear, to the eye that the old splines were very badly worn.

TF that the spline was ok.

Any how, new sprocket fitted AND GREASED, and now the chain is re adjusted, it is almost back to the new setting.

Just for info, chain and sprocket have been on since new.

Might be worth checking yours and putting some grease in there.

I think the OEM sprocket is made of a softer metal than the shaft for that very reason. It is better for the sprocket to wear than the drive shaft.

[Lutin]

How was the sprocket retaining plate? There was a tiny bit of wear on mine, so I turned it around and refitted it.

[RickSkye]

There was some wear. I was not sure about turning it round because the front face is beveled, like a cir clip. Sent for a new one anyway.

[awsi4u1]

well,
i just replaced sprockets and chain 2 days ago and indeed I also noticed some slag/rattle between the shaft and the front sprocket. the new one has also a bit of slag but much less than the old one. So when you fitted the front sprocket there will be still some play, I hope that is normal!
I also noticed less vibrations and smoother gear change after replacing the kit, now ride better, smoother than ever.

[davedixon]

Honda front sprockets are supposed to be slack (wobbly). This is to ensure that the sprockets are in-line. This was told to me by an official Honda mechanics at The Bike Show in 2006.

[Fruit Loop]

"A skittish motor-bike with a touch of blood in it is better than all the riding animals on earth. T.E. Lawrence "

That would be the T.E. Lawrence who survived guerilla warfare, the desert, international spying and high speed boats, only to be killed crashing his motorbike, would it?

(Interestingly his fatal crash indirectly led to the development and widespread use of crash-helmets.)

[RickSkye]

Honda front sprockets are supposed to be slack (wobbly). This is to ensure that the sprockets are in-line. This was told to me by an official Honda mechanics at The Bike Show in 2006.

I am not sure I understand that. It should be in line anyway.

[T ALP]

Honda front sprockets are supposed to be slack (wobbly). This is to ensure that the sprockets are in-line. This was told to me by an official Honda mechanics at The Bike Show in 2006.

I can take this back to 1971 with the origonal CB750 but it never made sense to me, as stated above the sprockets should be in line anyway.

Carn't see why the sprocket could'nt have been an interference fit, pushed on and got off with a puller.

Chris

[StumpyFingers]

I can take this back to 1971 with the origonal CB750 but it never made sense to me, as stated above the sprockets should be in line anyway.

Carn't see why the sprocket could'nt have been an interference fit, pushed on and got off with a puller.

Chris

I used to have a bike with a push fit rotor it had a woodruff key to keep it in the correct position, it kept breaking.