Sprocket

[ranton_rambler]

Any suggestions on either where to find a rear sprocket for my 175 with the earlier small hub/brake, or who could make me a custom one?

It has 4 pegs which engage with the cush-drive rubbers - see photo.

IMG_8919.jpg

[themoudie]

Aye Ranton,

My advice would be to have a quiet word, by email, with Nigel and await a reply.

Good health, Bill

[Jordan]

For a custom item, obtain a sprocket blank from an industrial supplier, with the desired tooth form (for example 428 or 08B) and number of teeth.
For a rear sprocket, it doesn't need to be a hardened type.
A competent metalworker/machinist/welder can make it fit your needs.

[DBDBrian]

As Jordan suggests, obtain a sprocket blank. Looking at the picture it appears to have an offset from the mounting face. Maybe a wider section blank with the same pitch, and machine off the width as required would overcome.

[ranton_rambler]

Yes, it's got a slight offset Brian.
My facilities here (or lack of) mean that I'd need to get someone to do the job once I have a suitable sprocket.
It's not too bad yet, so I might look for another to use as a donor so I can keep my bike in use.
I believe the same hub was used on Guzzi Stornello so there may be a possibility to find donor down that route.

[themoudie]

Aye Ranton,

Talon Sprockets, from whom Nigel obtained the rear sprockets for the Ducati spares business, might be worth a shout.

Talon_Engineering

I hope that you are able to find something, Bill

[Jordan]

I didn't notice the offset.
A possible way to deal with it is to keep most of the original sprocket.
Remove the teeth and steel down to the long curved slots, leaving 6 "spokes".
Remove the "opposite" from the new sprocket blank, so you have a band of teeth that fits around the original sprocket, and weld together.
Rebates on both parts could help ensure there's no wobble in the finished item.

[IanHood]

If the Stornello is the same, this appears to be available here (certainly looks the same)

https://www.recambio.it/en/product/tran ... stornello/

Ian

[ranton_rambler]

I reckon the fixing details of the Stornello are the same but they seem to be flat rather than offset as the Ducati version is. But might provide a donor centre if nothing else turns up.
Ian P

[IanHood]

Or, put some spacers on the pegs that engage with the cush drive - doesn’t look like it needs much so shouldn’t compromise the engagement badly.

Ian