Cota 172 Restoration

Need help finding information or parts for that old machine in your shed? Someone in here will know!

Moderator: Moderators

Phil 850
B grade participant
B grade participant
Posts: 98
Joined: Wed Dec 23, 2015 7:42 pm
Location: Western Sydney

Re: Cota 172 Restoration

Postby Phil 850 » Sun Jun 26, 2016 8:32 pm

Tanks David
I just measured the fork legs and they are 31.75mm (1-1/4").



David Lahey
Champion
Champion
Posts: 3397
Joined: Thu Jun 05, 2003 7:01 pm
Bike: Many Twinshocks
Club: CQTC Inc, RTC Inc
Location: Gladstone, Queensland

Re: Cota 172 Restoration

Postby David Lahey » Mon Jul 11, 2016 9:55 pm



relax, nothing is under control

Phil 850
B grade participant
B grade participant
Posts: 98
Joined: Wed Dec 23, 2015 7:42 pm
Location: Western Sydney

Re: Cota 172 Restoration

Postby Phil 850 » Thu Jul 14, 2016 9:36 pm

Thanks David
Unfortunately my fork legs measure 31.75mm so the ones on eBay would be a bit loose in the triple clamps :(



Phil 850
B grade participant
B grade participant
Posts: 98
Joined: Wed Dec 23, 2015 7:42 pm
Location: Western Sydney

Re: Cota 172 Restoration

Postby Phil 850 » Sat Oct 08, 2016 2:55 pm

I have stripped and cleaned out an old speedo drive but I don't understand how it attaches to the front wheel to drive the internal gear ?.
Any clues.

Phil



Phil 850
B grade participant
B grade participant
Posts: 98
Joined: Wed Dec 23, 2015 7:42 pm
Location: Western Sydney

Re: Cota 172 Restoration

Postby Phil 850 » Sat Oct 08, 2016 5:05 pm

I've discovered that there is a drive bracket missing from my speedo drive.
I think it should be screwed to these three holes on the worm gear.
Image
The bracket then fits into these slots in the front wheel hub.
Image



David Lahey
Champion
Champion
Posts: 3397
Joined: Thu Jun 05, 2003 7:01 pm
Bike: Many Twinshocks
Club: CQTC Inc, RTC Inc
Location: Gladstone, Queensland

Re: Cota 172 Restoration

Postby David Lahey » Sat Oct 08, 2016 9:42 pm

Yes and the tangs fit in those slots in the side of the hub


relax, nothing is under control

Phil 850
B grade participant
B grade participant
Posts: 98
Joined: Wed Dec 23, 2015 7:42 pm
Location: Western Sydney

Re: Cota 172 Restoration

Postby Phil 850 » Tue Oct 11, 2016 8:01 pm

Thanks David
The mysteries of a restoration.
First step was to make a stand to clamp the frame to for the strip down and rebuild.
Image



Phil 850
B grade participant
B grade participant
Posts: 98
Joined: Wed Dec 23, 2015 7:42 pm
Location: Western Sydney

Re: Cota 172 Restoration

Postby Phil 850 » Mon Nov 07, 2016 8:33 pm

While I wait for the parts I ordered from Vallmoto in Spain to arrive I started tidying up some aluminium and polished the handlebars and levers.
Image
Image

Came up OK.
I had assumed that all the fasteners on the bike would be imperial but I noticed the the bolts holding the handlebars in place were grade 8.8 so they must be metric.
Would this be correct for ALL of the fasteners being metric.



David Lahey
Champion
Champion
Posts: 3397
Joined: Thu Jun 05, 2003 7:01 pm
Bike: Many Twinshocks
Club: CQTC Inc, RTC Inc
Location: Gladstone, Queensland

Re: Cota 172 Restoration

Postby David Lahey » Mon Nov 07, 2016 10:44 pm

I have never found anything but metric threads on my Spanish bikes. Warning though there are some odd metric size threads like 7mm (OSSA kickstart and OSSA handlebar clamp threads)
Also odd sized metric socket head screws. Cota 348 head nuts are 7mm AF hex socket
Montesa 348 engine cover screws are also 7mm thread
Finding similar things on your 172 will be part of the fun of working on a Spanish bike
I seem to remember the Czech-made bikes of my youth were also all metric fasteners


relax, nothing is under control

Phil 850
B grade participant
B grade participant
Posts: 98
Joined: Wed Dec 23, 2015 7:42 pm
Location: Western Sydney

Re: Cota 172 Restoration

Postby Phil 850 » Wed Nov 09, 2016 8:04 pm

Thanks David
Strangely, I was in Masters the other day and saw some packets of bolts marked M7. I thought this very strange as that is a non-preferred size according to the Australian Standards, but sure enough, it was genuinely M7.
Fortunately I have a very good fastener supplier near by.




Return to “Twinshock & Classic Trials”

Who is online

Users browsing this forum: MSN [Bot] and 10 guests