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Carb shaft seals

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Carb shaft seals Empty Carb shaft seals

Post  Sheldon cooper Fri 10 Jun - 22:17

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??

Sheldon cooper

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Join date : 2015-11-13

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Carb shaft seals Empty Re: Carb shaft seals

Post  barker Fri 10 Jun - 23:02

try fowlers on line site may show a diagram

barker

Posts : 515
Join date : 2011-03-24
Location : littlehampton

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Carb shaft seals Empty Re: Carb shaft seals

Post  JohnW Sat 11 Jun - 9:02

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.

JohnW

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Carb shaft seals Empty Re: Carb shaft seals

Post  Sheldon cooper Mon 13 Jun - 9:08

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

Sheldon cooper

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Carb shaft seals Empty Re: Carb shaft seals

Post  barker Mon 13 Jun - 18:28

were are you

barker

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Location : littlehampton

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Carb shaft seals Empty Re: Carb shaft seals

Post  Sheldon cooper Tue 14 Jun - 9:15

Bolton

Sheldon cooper

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Carb shaft seals Empty Re: Carb shaft seals

Post  Duckrider Wed 6 Jul - 13:15

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.
Duckrider
Duckrider

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Join date : 2014-06-08
Age : 63
Location : Athens

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Carb shaft seals Empty Re: Carb shaft seals

Post  Sheldon cooper Thu 7 Jul - 8:45

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

Sheldon cooper

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Carb shaft seals Empty Re: Carb shaft seals

Post  Sheldon cooper Thu 7 Jul - 8:46

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,

Sheldon cooper

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Carb shaft seals Empty Re: Carb shaft seals

Post  Duckrider Fri 8 Jul - 17:27

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.
Duckrider
Duckrider

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Post  Sheldon cooper Sat 9 Jul - 12:35

Thank you your help would be much apriciated

Sheldon cooper

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Carb shaft seals Empty Re: Carb shaft seals

Post  barker Sun 10 Jul - 19:11

keep us informed most intresed

barker

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Carb shaft seals Empty Re: Carb shaft seals

Post  Duckrider Tue 27 Feb - 14:46

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


After dividing the throttle shaft :

Carb shaft seals Dsc01370

The shaft seals appeared dry and in bad condition

Carb shaft seals Dsc01375

I removed the shaft

Carb shaft seals Dsc01376

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

Carb shaft seals Dsc01385

Here are the new seals i bought :

Carb shaft seals Dsc01386

Carb shaft seals Dsc01387

Carb shaft seals Dsc01388

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

Carb shaft seals Dsc01389
Duckrider
Duckrider

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Carb shaft seals Empty Re: Carb shaft seals

Post  Duckrider Tue 27 Feb - 15:18

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

Carb shaft seals Dsc01390

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

Carb shaft seals Dsc01392

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..

Carb shaft seals Dsc01393

perfectly fit in the carburettor:

Carb shaft seals Dsc01394

and to the shaft:

Carb shaft seals Dsc01395

I assembled the carburetor

Carb shaft seals Dsc01401

Carb shaft seals Dsc01402

I also changed the Oring of the pilot screw

Carb shaft seals Dsc01403

The number is this:

Carb shaft seals Dsc01405

As you can see the old one was pressed

Carb shaft seals Dsc01407

And everything is fine:

Carb shaft seals Dsc01417

















Duckrider
Duckrider

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Carb shaft seals Empty Re: Carb shaft seals

Post  JohnW Tue 27 Feb - 16:42

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.

JohnW

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Join date : 2011-10-29

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Carb shaft seals Empty Re: Carb shaft seals

Post  Duckrider Sat 3 Mar - 18:28

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.
Duckrider
Duckrider

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Carb shaft seals Empty Front shock absorbers

Post  JohnW Sat 3 Mar - 22:02

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.

JohnW

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Carb shaft seals Empty Re: Carb shaft seals

Post  Duckrider Mon 5 Mar - 15:48

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/
Duckrider
Duckrider

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Carb shaft seals Empty Re: Carb shaft seals

Post  JohnW Mon 5 Mar - 20:11

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!

JohnW

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Carb shaft seals Empty Re: Carb shaft seals

Post  adespin Tue 6 Mar - 9:01

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

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Carb shaft seals Empty Re: Carb shaft seals

Post  Duckrider Tue 6 Mar - 16:39

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?
Duckrider
Duckrider

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Carb shaft seals Empty Re: Carb shaft seals

Post  adespin Tue 6 Mar - 16:56

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.
adespin
adespin

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