Topic: Gas cap rubber seal installation question

[Scott S]

 I replaced the crumbling gas cap seal on my CB500 tank with a fresh new one.
 There's a thick side and a thin side. Logic told me the thick side faced out to seal against the filler neck. But I CANNOT get the cap to latch that way.
 Do I have it backwards?

[Scott S]

 Well, I don't think it's the seal. The new, genuine Honda locking gas cap won't catch even with the seal out.

[Kevin D]

Scott, a long time ago (15 yrs), I got a new shiny genuine gas cap and it didn’t fit my tank. Checking the part numbers, I found a later part number was substituted and the later part had a thicker gasket. I told the vendor about the swap and they weren’t listening/didn’t care, but I bought the early thinner gasket and fitted it to the new cap and all was well.
 It’s 15 years Scott, I don’t know if I can dig out the details, but I see you have 71 CB 500, mine is a 71 CB750, simlar parts?

[Scott S]

 I got it. I removed the latch from the tank and installed it on the cap. That seemed to "reset" something. It's working now, but tight.

 By the way, I just discovered this today. That's a MUCH easier way to install the seal!

[RAFster122s]

Cool tip Scott, thank you for sharing!

[dave500]

also under that cap once its apart there will by a ton of crud.