Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: McCabe-Thiele (Ted) on July 20, 2023, 05:42:39 PM

Title: O ring seal question for 500 cylinder bores?
Post by: McCabe-Thiele (Ted) on July 20, 2023, 05:42:39 PM

The four cylinder bore block seals part number 91304-286-00 are shown in the parts book as 61.8 x 2 mm.

I have a set in my engine gasket set that fit nicely - they are black - on checking my disassembly photos the originals were a sort of orange/light brown colour.

Is this due to an upgrade in the materials used or ought they to be orange?

Title: Re: O ring seal question for 500 cylinder bores?
Post by: AshimotoK0 on July 20, 2023, 06:02:56 PM

Fitted mine last night to my 500K0 engine and they were black. From a quality pattern gasket set Bryan kindly sold me ages ago when I first got the bike ...if they are good enough for Bryan they are good enough for me.

Title: Re: O ring seal question for 500 cylinder bores?
Post by: Oddjob on July 20, 2023, 06:43:41 PM

Also seen them in green Ted. They'll be fine.