Kick start shaft X Ring failure

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pierodn

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Hi All.
The bike, a 1971 Fastback, was on the stand by 2 months.
This morning I found a lot of oil on the ground.
Was from the kick start shaft.
How is it that suddenly with the bike on the stand, fails the x ring mounted only a year ago?
Thank you.
Ciao.
Piero
 
Get one of these. Solved all my kickstarter leak problems.
Kick start shaft X Ring failure

Napa sells them here in the US, but SKF should be available world wide. You have to remove the inner retainer ring that holds the seal. Just heat the cover and hit it sharply on your workbench and it will drop out.
Put the retainer ring in the freezer before you reinstall it.
 
htown16 said:
Get one of these. Solved all my kickstarter leak problems.
Kick start shaft X Ring failure

Napa sells them here in the US, but SKF should be available world wide. You have to remove the inner retainer ring that holds the seal. Just heat the cover and hit it sharply on your workbench and it will drop out.
Put the retainer ring in the freezer before you reinstall it.
Click to expand...

Hi,
I cannot find this seal.
Could you tell me the code/number.
Thank you.
Ciao
Piero
 
Hi and thank you.
Three commando of mine hasve a new xring and all have oil leak!
Maybe the xring doesnt work well?
I have to update with a better seal!
Ciao
Pieri
 
kommando said:
Piero,
look at the box, 9815 is the part, put skf 9815 in google and you get

http://www.skf.com/in/products/seals/in ... =701254020

Really cheap at only $3 but shipping seems really high on ebay and Amazon, so found this alternative in the UK

http://www.bearingboys.co.uk/W125100025 ... al-99110-p

Width: 1/4inch
Outside Dia: 1.1/4inch
Inside Dia: 1inch
Click to expand...

Hi.
I bought just now five orings from bearingboys.
I have to machine the outer cover and the retainer ring too?
Ciao
Piero
 
Hi.
Should the seal lip go on the inside towards the gearbox or towards the outside?.
Ciao
Piero
 
Read Htowns instructions, you remove the retaing ring, no need for machining of cover but like fitting a bearing cool the seal and warm the cover but not a lot as the seal is rubber. Like an engine seal the pressure side faces the oil, the pressure side normally has the steel spring.
 
The skf seal requires no machining of the cover or retaining ring. The one you bought from bearing boys looks to be twice as thick. You shouldn't have to machine the cover but the retaining ring may need thinned, or maybe not. You will just have to try it.
The lip always points toward the fluid you are trying to seal, in this case towards the inside of the gearbox.
 
This will make a few howl in disgust, fit a 26+4mm n70 oring in the hole, .5mm thicker cross section than 1/8th section, a seal is a better option
To get the std size oring to work correct all surfaces will need to be scratch free , whats the kick start bush like, flopping around in the case as usual
 
splatt said:
This will make a few howl in disgust, fit a 26+4mm n70 oring in the hole, .5mm thicker cross section than 1/8th section, a seal is a better option
To get the std size oring to work correct all surfaces will need to be scratch free , whats the kick start bush like, flopping around in the case as usual
Click to expand...

And free of play from wear.
 
splatt said:
This will make a few howl in disgust, fit a 26+4mm n70 oring in the hole, .5mm thicker cross section than 1/8th section, a seal is a better option
To get the std size oring to work correct all surfaces will need to be scratch free , whats the kick start bush like, flopping around in the case as usual
Click to expand...

I think you're on the right track but always use hardest Viton you can get instead of cheap Buna or Nytril. Get brown viton so you always know what it is - try "Oring store" online in the US.

Here's what I use with excellent results (no machining, use oil and a wooden dowel rod to work into place):

Tranny kick shaft – cram in oversize 1/8x1-1/8 ID viton Oring.

Also:
1/16th by 3/8th OD viton Oring clutch push rod seal (after market item for belt drives)
Oversize 3/32 x 11/16 ID viton O ring shift lever - cram it in.
Tranny cam & shift pawl use 3/4 OD x 3/32 viton Oring
 
Softer orings seals easier, Viton does give you a lot better oring but a std oring should easily handle the heat
Orings in the front of hydraulic motors and pumps always seem a size to big ,so 1 1/8 '' is probably better than 1''
 
htown16 said:
The skf seal requires no machining of the cover or retaining ring. The one you bought from bearing boys looks to be twice as thick. You shouldn't have to machine the cover but the retaining ring may need thinned, or maybe not. You will just have to try it.
The lip always points toward the fluid you are trying to seal, in this case towards the inside of the gearbox.
Click to expand...
Yes.
I will machine the retainer ring of 2 mm, the seal is too tick.

Ciao
Piero
 
pierodn said:
htown16 said:
The skf seal requires no machining of the cover or retaining ring. The one you bought from bearing boys looks to be twice as thick. You shouldn't have to machine the cover but the retaining ring may need thinned, or maybe not. You will just have to try it.
The lip always points toward the fluid you are trying to seal, in this case towards the inside of the gearbox.
Click to expand...
Yes.
I will machine the retainer ring of 2 mm, the seal is too tick.

Ciao
Piero
Click to expand...
You have the wrong seal.

Kick start shaft X Ring failure
 
Hi.
Skf seal has 3,18 mm width.
Mine from bearing boys has 6,35 mm widht.
So if i want use it imust grind 3 mm the bush; i think it works fine the same, maybe better because the seal is too tick.
Ciao
Piero
 
On second throught I might be worried about the retaining ring coming loose if you thin it that much. I believe I would try to find the skf seal.
 
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