Another O-ring post

[atonic]

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.

[BassCliff]

Hi,

Old intake boot and flat O-ring:




New intake boot and O-ring:




Thank you for your indulgence,

BassCliff

[atonic]

I think mine were flatter than that. 3 of them look like miniature piston rings.

[JEEPRUSTY]

Admitting old rubbers are bad is a major step forward.
Some folks think these bikes are B&S lawnmowers and that they are not.

[Gonzo]

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.

[JEEPRUSTY]

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.

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.

[KEITH KRAUSE]

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.