175TS rear hub

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ranton_rambler
Posts: 122
Joined: Sun Jun 04, 2017 11:33 am
Location: Stafford UK

175TS rear hub

Postby ranton_rambler » Wed Mar 21, 2018 9:01 pm

I stripped the wheels down a couple of weeks ago so I could measure up and order new rims/spokes. I've realised that the rear hub is maybe an unusual one. It looks like the illustration in the manual for the smaller brake fitted on bikes up to the 175TS, and the drum measures up at 136mm. I think the 175 Sport and above had a bigger brake. Front brake is bigger.
Any thoughts on where I might source new cush drive rubber inserts, and a new sprocket? None of the places I've looked at so far list these type.

DSCF5445small.jpg

Jordan
Posts: 782
Joined: Fri Dec 24, 2010 11:29 am

Re: 175TS rear hub

Postby Jordan » Thu Mar 22, 2018 12:08 am

If cush rubbers are not available, you could try making some. Rubber is easy to shape by grinding.
First get the rubber block of suitable hardness (Durometer or Shore). Take a sample of some similar to the rubber supplier.
Roughly cut to shape with a cutting blade in an angle grinder.
Grind to finished shape on the outsides, using a bench mounted abrasive belt machine, or bench grinder. Supreme accuracy shouldn't be needed.
The inside hole would be more challenging. Maybe use a diamond abrasive burr bit in a drill. Some jig could be made, to "mill" it more accurately.
Just suggestions!
Having said all that, the ones you have don't seem so bad in the photo.

For sprocket, if you have the original you can reband it with a blank sprocket, available from industrial suppliers.
Or use the blank to make one from scratch.
Care to keep it concentric with centre hole.

Ventodue
Posts: 462
Joined: Mon Mar 08, 2010 3:23 pm
Location: Montpellier, France

Re: 175TS rear hub

Postby Ventodue » Thu Mar 22, 2018 9:44 am

ranton_rambler wrote: Any thoughts on where I might source ... and a new sprocket?

Hi Ian,

Try Jane at Sprockets Unlimited (just down the road from you ...)

http://www.sprocketsunlimited.com/

01386 831341.

EDIT
Otherwise, on sale by Italian Motorbikes in Italy. Go:

http://www.italian-motorbikes.com/Pagin ... %20ita.htm

ranton_rambler
Posts: 122
Joined: Sun Jun 04, 2017 11:33 am
Location: Stafford UK

Re: 175TS rear hub

Postby ranton_rambler » Thu Mar 22, 2018 7:29 pm

Thanks both, I have done some looking around and I think I should be able to get a sprocket made. Stafford Show coming up in a few weeks.

Eldert
Posts: 548
Joined: Sun Nov 01, 2009 3:23 pm
Location: Hazerswoude Rijndijk Netherlands

Re: 175TS rear hub

Postby Eldert » Fri Mar 23, 2018 12:03 pm

italian motorbikes dont have the correct sprocket . you need one with 4 pins .

Eldert

Ventodue
Posts: 462
Joined: Mon Mar 08, 2010 3:23 pm
Location: Montpellier, France

Re: 175TS rear hub

Postby Ventodue » Sat Mar 24, 2018 8:48 am

Eldert wrote:italian motorbikes dont have the correct sprocket . you need one with 4 pins . Eldert

Eek :o !

175 sprocket.jpg

Good spot. I trust you'll let them know, Eldert ;) !

ranton_rambler
Posts: 122
Joined: Sun Jun 04, 2017 11:33 am
Location: Stafford UK

Re: 175TS rear hub

Postby ranton_rambler » Sat Mar 24, 2018 9:02 am

That's the one. I have the old one to use as a pattern, or I could cut the middle out and weld/bolt a new outer to it.

ranton_rambler
Posts: 122
Joined: Sun Jun 04, 2017 11:33 am
Location: Stafford UK

Re: 175TS rear hub

Postby ranton_rambler » Sun Jul 08, 2018 8:12 pm

Just for interest, I was at the Festival of 1000 Bikes at Mallory Park this weekend and there were quite a few small Italian bikes there. Now I'm a bit more familiar, I can see there was a lot of component sharing between the manufacturers.
There were a couple of Guzzi Stornello 125's there and I reckon the rear hub is the same as my 175. Might offer a few more options when searching for bits.
Ian


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