Topic: rear sprockets

[Buffo]

my bike, the famous 1978 CB750K8, came with 2 rear sprockets. one is a Sunstar 405 with 41 teeth. It looks like a stock sprocket. The other spocket says  Esprit and has the numbers 972241 under the name also with 41 teeth. The esprite sprocket however is solid, the only holes in it are the 4 bolt holes. I think this may be the replacement sprocket for the sunstar one.

I havent seen many without holes.

Is this a good name in sprockets?

How can i tell if a sprocket is worn out?

dON

[oldbiker]

Just look at the shape of the teeth. If there is any sign of hooking (ie. hollowing in the face of the teeth), then it is worn out.

[jbailey]

I know the Honda 750 represents the dawn of the superbike era, but didn't realize it began in 1798!

[Bob Wessner]

 

[oldbiker]

Hey jbaily, your dislexia is showing.

[nteek754]

Buffo
hey there you can also put the chain around the suspect sprocket and try to pull the chain away from  the teeth  the less it moves the better the sprocket good luck

[oldbiker]

Trying tp pull the chain away from the sprocket is more a test of chain wear than sprocket wear. Any way if either is worn enough to need changing then it is advisable to change them as a pair.

[Quail "Owner of the comfortable k8"]

Hey if you want to compare it to a worn out one, just buy one off ebay that states: vintage/orig/looks good/shows a little wear, in the discription.  Then you will have a worn out sprocket to compare yours to.

[Buffo]

Thanks guys.  I Dont see any real wear at all on the older (sunstar) sprocket. No metal is wore off of the teeth and nothing looks rounded.

The only real difference on the new sprocket the teeth are pointed at the top. The older one doesnt have pointed teeth, they are flat but not worn down. it looks like it was made that way.
It seems that i got 2 good sprockets.
Don