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Re: Oil filler cap

John, Many good hardware stores have an o-ring box in their hardware section. You may not get viton, but the standard 'rubbers' work fine for this. The issue is usually just one of cleaning anyway. Remove both o-rings and clean everything up. If the o-ring isn't torn or damaged, it'll probably work fine.

If you can't find one in the local hardware, try any bearing supply shop. They are the normal place for this item.

Bob Hadden

On Jun 25, 2008, at 5:51 PM, Dancoe, John wrote:

Back in '95 I put a viton o-ring in my engine oil filler cap, and it's been
working fine 'til just recently.

I need to replace the o-ring, or maybe spring for a tamper-proof filler cap.

I'm not super worried about sabotage; the bike's in secure parking 99.9% of the time and it's never been a big issue in my personal experience or on this list. Still, it doesn't seem like a bad idea to address a fairly critical

What do we like in tamper-proof caps these days--if anything? Seems like I read on this list that some on the market have mechanical issues (jam nuts
come loose or some such). I don't need to sabotage myself!

Are hex head OEM caps back-compatible? I'm betting not but that could be a
nice choice if they are.

Who's a likely supplier for the replacement o-ring in viton? My notes say it's
a #214 but no clue where I bought it.

John Dancoe
'93 R11RS