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Carb shaft seals

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Carb shaft seals

Post  Sheldon cooper on Sat 11 Jun - 8:17

Hi guys need a bit of help, I striped and clean my carb and found the shaft seals have perished, the problem is I can't find a part number and they don't seem to be on any of the exploded dioramas I have seen, any one know where I can get some or part number ect??

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Re: Carb shaft seals

Post  barker on Sat 11 Jun - 9:02

try fowlers on line site may show a diagram

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Re: Carb shaft seals

Post  JohnW on Sat 11 Jun - 19:02

Here is the carb diagram on Fowlers web site https://www.fowlersparts.co.uk/parts/3974477/t80-2fl-1986-999-a/carburetor The o rings are not listed so not available as a seperate part.
Try this firm Simply Bearings http://simplybearings.co.uk/shop/index.php?cPath=4747_4750&gclid=CPO4wPzBn80CFQo6GwodSYsKlgyou will need to measure the old ones first for size.

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Re: Carb shaft seals

Post  Sheldon cooper on Mon 13 Jun - 19:08

Thanks for the help, guess this is the problem with these bikes now parts are hard to find, anyone looking for a townmate

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Re: Carb shaft seals

Post  barker on Tue 14 Jun - 4:28

were are you

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Re: Carb shaft seals

Post  Sheldon cooper on Tue 14 Jun - 19:15

Bolton

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Re: Carb shaft seals

Post  Duckrider on Wed 6 Jul - 23:15

I have the same problem .

Unfortunately at the stores with bearings and seals they told me that these parts are special parts and i can order theme only from mikuni.

I found the same seals in size but the outside material was metal.

So at the moment i am looking for a mikuni representative in Eu.
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Re: Carb shaft seals

Post  Sheldon cooper on Thu 7 Jul - 18:45

I still haven't found any, what size are they? I think Greece is the place to look, any Greek members that could help??

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Re: Carb shaft seals

Post  Sheldon cooper on Thu 7 Jul - 18:46

I do have another carb that I could strip for parts but I think I would have that same problem and the seals would split when I try to remove them, might be only option at this rate,

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Re: Carb shaft seals

Post  Duckrider on Sat 9 Jul - 3:27

Sheldon cooper wrote:I still haven't found any, what size are they? I think Greece is the place to look, any Greek members that could help??

I am on vacation mow, i will return to Athens at the end of next week.

I will buy the ones i have found and if these are ok, i will buy some more to send to you.

Another solution is to buy o-rings and because the metal plates at both ends keep the seals in position maybe they will keep in position and the o-rings.
I will try this way also.
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Re: Carb shaft seals

Post  Sheldon cooper on Sat 9 Jul - 22:35

Thank you your help would be much apriciated

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Re: Carb shaft seals

Post  barker on Mon 11 Jul - 5:11

keep us informed most intresed

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Re: Carb shaft seals

Post  Duckrider on Wed 28 Feb - 1:46

I will try to show you how I solved the problem with these carb-shaft-seals.


After dividing the throttle shaft :



The shaft seals appeared dry and in bad condition



I removed the shaft



And appeared the bronze cylinders in which the axle is rotated .



Here are the new seals i bought :







Unfortunately, although the inside diameter was very good, the outside was bigger.


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Re: Carb shaft seals

Post  Duckrider on Wed 28 Feb - 2:18

I measured the inside diameter in the carburetor, and I found it 11.5mm



The outside diameter of the new seals is just 1mm bigger, 12mm:



I went back to the store and told the seller my problem.
He told me that genuine seals would not be found and suggested two solutions to me,
first, to to increase the diameter of the carburetors by going to a machine shop, or
second to replace the seals with a custom internal diameter to match the diameter of the shaft, and a slightly smaller outer diameter to fit the diameter of the carburettor.

I chose the second solution.
and bought a few Ο-rings in the appropriate dimension and made for use at temperatures and petrol..



perfectly fit in the carburettor:



and to the shaft:



I assembled the carburetor





I also changed the Oring of the pilot screw



The number is this:



As you can see the old one was pressed



And everything is fine:



















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Re: Carb shaft seals

Post  JohnW on Wed 28 Feb - 3:42

A good solution to the problem. Original parts like this being unobtainable can be a problem in keeping Townmates on the road. Another part that is no longer available is the front shock absorbers. The length, bottom fixing and spring strength are critical. They are a wearing part and eventually even serviceable used ones will be unobtainable. Luckily I a have a few second had ones in stock which hopefully will keep my bike on the road for the foreseeable future. I had to change one some time ago due to leaking damping fluid.

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Re: Carb shaft seals

Post  Duckrider on Sun 4 Mar - 5:28

Very good solution and very cheap.

Since there are metal surfaces on both ends of the shaft, these surfaces press the orings, and from roundly become quadrangle, which forces them to further press the shaft and seal it even more, as they take the shape of the position where the seals were mounted.

As for the front shock absorbers, it is also hard to find genuine in the Greek market.
But if someone does not have high demands on road behavior, he can find many shock absorbers at prices ranging from 25 to 30 euros.
I do not know if my own are genuine or not, I do not know how to distinguish them.
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Front shock absorbers

Post  JohnW on Sun 4 Mar - 9:02

Duckrider wrote:Very good solution and very cheap.
As for the front shock absorbers, it is also  hard to find genuine in the Greek market.
But if someone does not have high demands on road behavior, he can find many shock absorbers at prices ranging from 25 to 30 euros.
I do not know if my own are genuine or not, I do not know how to distinguish them.

I have never seen any non genuine (repro) front shocks advertised, rear ones yes.

With regards to carb seals, these are only dust seals for the pivot bearings, and have no effect on the carb function ie mixture strength. So not really an issue. If the O ring replacements are too tight on shaft it could make throttle action heavy or worse a sticking throttle.

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Re: Carb shaft seals

Post  Duckrider on Tue 6 Mar - 2:48

JohnW wrote:
I have never seen any non genuine (repro) front shocks advertised, rear ones yes.


Here are some parts:

https://www.car.gr/parts/view/7453982/?lang=en

https://www.car.gr/parts/view/5516772/

https://www.car.gr/parts/view/3547693/

and a bike for parts : https://www.car.gr/parts/view/12662094/
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Re: Carb shaft seals

Post  JohnW on Tue 6 Mar - 7:11

Not available in UK. At 28 Euros these are cheap thats £25 in UK money, particularly as these are complete with links, bushes and spindles. I must say the links dont look a very good finish, so could be inferior poor quality parts. Could be a disaster if they broke!

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Re: Carb shaft seals

Post  adespin on Tue 6 Mar - 20:01

Duckrider you are so fortunate to be living in Greece, warm climate, and access to a treasure trove of obsolete Townmate parts :d\\'-\\':
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Re: Carb shaft seals

Post  Duckrider on Wed 7 Mar - 3:39

adespin wrote:Duckrider you are so fortunate to be living in Greece, warm climate, and access to a treasure trove of obsolete Townmate parts :d\\'-\\':

Τhere are indeed many spare parts at very good prices, but let's not forget that the wages in my country have also fallen by 60% in recent years.
As for the durability of these spare parts during the time , I can not know it.

In the front shock absorber if the lever on the base is not damaged, you can only change the shock absorber.

Can you make a list of the parts you need?
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Re: Carb shaft seals

Post  adespin on Wed 7 Mar - 3:56

Thank you for the kind offer but at the moment i don't need any parts as i restored my bike last year. If i need any parts in the future i will contact you.
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Re: Carb shaft seals

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