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Another O-ring post

  • Thread starter Thread starter atonic
  • Start date Start date
A

atonic

Guest
Well, finally (after 4 years) pulled the carbs off to replace the intake o-rings. Old screws came out without a problem, since the first tool to touch them was an impact driver. Thanks to all the folks that have mentioned that throughout history.

When I pulled the first boot off and looked at it I was a bit confused. I KNOW it leaked like a sieve from the WD40 test. But the o-ring was shiny, totally uniform, without and cracks or gaps, and completely flat. Then I remembered that it isn't supposed to be flat.
 
Hi,

Old intake boot and flat O-ring:

intake_repair44.jpg



New intake boot and O-ring:

intake_repair51.jpg



Thank you for your indulgence,

BassCliff
 
I think mine were flatter than that. 3 of them look like miniature piston rings.
 
Admitting old rubbers are bad is a major step forward.
Some folks think these bikes are B&S lawnmowers and that they are not.
 
Last edited:
I finally got my boots pulled today (bad episode of stripped and seized up screws) and the rings on mine were flatter than a girl on a big wheel. One was broken and the other 3 were so flat they weren't even at least flush with the boot, they had flattened beneath that point. I can only imagine what a huge difference it's going to make with clean carbs, new boots, sealed air box etc, etc. My bike is going to thank me. :D
 
Gonzo said:
I finally got my boots pulled today (bad episode of stripped and seized up screws) and the rings on mine were flatter than a girl on a big wheel. One was broken and the other 3 were so flat they weren't even at least flush with the boot, they had flattened beneath that point. I can only imagine what a huge difference it's going to make with clean carbs, new boots, sealed air box etc, etc. My bike is going to thank me. :D
Click to expand...


Well you will get a sealed joint. I have had several instances where the boots had different levels of o-ring left. All were brittle and useless as a seal. It is odd how they shrivel to a point lower than the sealing surface.
 
They will flatten with time. I suggest a coat of high temp grease to help them last. Replace the stock Phillips screws with Allens. Torque to approx' 8-9 ft/lb.
 
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