Cota 172 Restoration

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

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David Lahey
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Re: Cota 172 Restoration

Postby David Lahey » Mon Nov 19, 2018 10:11 pm

Phil 850 wrote:Fully stripped the rear wheel.
Now do I polish the hub or leave it the original satin :|
IMG_4295.JPG

vapour blast is perfect for that


relax, nothing is under control

Phil 850
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Re: Cota 172 Restoration

Postby Phil 850 » Tue Nov 20, 2018 9:09 pm

While cleaning the spokes today I discovered I had one short one :cry:
IMG_4299.JPG
IMG_4299.JPG (145.3 KiB) Viewed 4780 times

Which also means I have a nipple with a bit of thread rusted in it !

So I might bite the bullet and buy all new spokes and nipples for both front and rear wheels.
Any suggestions of who I should contact ?



Phil 850
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Re: Cota 172 Restoration

Postby Phil 850 » Sat Dec 15, 2018 9:40 pm

Well I started cleaning the hubs and somehow they finished up like this.
C62F6C69-29A8-4D18-AD65-B859C6D00EB2.jpeg
C62F6C69-29A8-4D18-AD65-B859C6D00EB2.jpeg (309.83 KiB) Viewed 4702 times


I have ordered new stainless steel spokes and should have them before Christmas so I will have some interesting work ahead.



Phil 850
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Re: Cota 172 Restoration

Postby Phil 850 » Sun Dec 23, 2018 9:33 pm

Looks like I have some work to do over Christmas reassembling my wheels with new stainless steel spokes.
C27E2397-B34A-4B35-A7BE-F311F47C2C62.jpeg
C27E2397-B34A-4B35-A7BE-F311F47C2C62.jpeg (327.19 KiB) Viewed 4662 times



Phil 850
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Re: Cota 172 Restoration

Postby Phil 850 » Thu Dec 27, 2018 10:26 pm

Had some time today so I assembled my wheels.
Laced up the hub similar to the original photo.

011824F8-45EE-4912-A665-0BCB664E6A84.jpeg
011824F8-45EE-4912-A665-0BCB664E6A84.jpeg (688.16 KiB) Viewed 4622 times

Layed the rim over the top and installed the nipples following the photo.

9C7F1C2D-FB6A-4037-AC61-870F85E4DA20.jpeg
9C7F1C2D-FB6A-4037-AC61-870F85E4DA20.jpeg (645.64 KiB) Viewed 4622 times


Laced up the rear wheel.

1932AD8B-F6E0-4ACF-81D7-525B6E2E5CB8.jpeg
1932AD8B-F6E0-4ACF-81D7-525B6E2E5CB8.jpeg (440.69 KiB) Viewed 4622 times

Yet to true and tighten the spokes.



Phil 850
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Re: Cota 172 Restoration

Postby Phil 850 » Tue Jan 08, 2019 9:38 pm

I have trued up the wheels but how do I know if all the spokes are the right tension :o



Cota 123
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Re: Cota 172 Restoration

Postby Cota 123 » Tue May 26, 2020 11:38 am

I have enjoyed reading this thread and watching your rebuild. Hopefully the rebuild is still progressing and we will see an update soon. I didn't know Montesa made a blue trials bike, it must be a very rare machine you have there. I wonder how many blue ones were made? Any idea what year yours is?

cheers



Phil 850
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Re: Cota 172 Restoration

Postby Phil 850 » Tue May 26, 2020 9:12 pm

The chassis is 19M1851, as I believe there were only about 1990 built I guess it’s pretty late, but I think it’s 1975.
I’ve been waiting for my rear shocks to be rebuilt as the shaft of one was bent and wore the piston on one side. I have no doubt that it will be a good job but I have been waiting 2 years and 7 months so far :cry: .
I could not get the correct 172 aluminium mud guards as many suppliers think the wheels are the same size as a Cota 123, but they are actually the same as a 247, so I have to adapt a set of 247 guards to it. At least they match the diameter of the wheels :D
I’m yet to have the front forks tubes rechromed and bushes fitted to the bottom legs as they have worn badly. No bushes are originally fitted so the aluminium legs wear out :|
I’m waiting to see if I have to sell a kidney to get my shocks back before I send off the forks (any recommendations ?)

I have all the electrics and speedo as I intend to put it on historic plates.

Phil



David Lahey
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Re: Cota 172 Restoration

Postby David Lahey » Tue May 26, 2020 9:29 pm

Phil 850 wrote:The chassis is 19M1851, as I believe there were only about 1990 built I guess it’s pretty late, but I think it’s 1975.
Phil

My friend Colin Lough bought his Cota 172 new in 1976 from the Montesa shop at Breakfast Creek in Brisbane. It came with the strange sliding pin type kickstart lever and he still has the bike and it is in excellent condition.


relax, nothing is under control

Rod
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Re: Cota 172 Restoration

Postby Rod » Wed May 27, 2020 7:07 am

Phil 850 wrote:The chassis is 19M1851, as I believe there were only about 1990 built I guess it’s pretty late, but I think it’s 1975.
I’ve been waiting for my rear shocks to be rebuilt as the shaft of one was bent and wore the piston on one side. I have no doubt that it will be a good job but I have been waiting 2 years and 7 months so far :cry: .
I could not get the correct 172 aluminium mud guards as many suppliers think the wheels are the same size as a Cota 123, but they are actually the same as a 247, so I have to adapt a set of 247 guards to it. At least they match the diameter of the wheels :D
I’m yet to have the front forks tubes rechromed and bushes fitted to the bottom legs as they have worn badly. No bushes are originally fitted so the aluminium legs wear out :|
I’m waiting to see if I have to sell a kidney to get my shocks back before I send off the forks (any recommendations ?)

I have all the electrics and speedo as I intend to put it on historic plates.

Phil


Have a look at David Snyders eBay site, he has a couple of fork sets for the 172.
https://www.ebay.com/itm/Montesa-Cota-1 ... SwLcZes9HB

https://www.ebay.com/itm/Montesa-Cota-1 ... Swq~Fes9lv




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