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General Category => Maintenance => Topic started by: maverick9611 on December 31, 2024, 08:42:18 AM

Title: 84/85 gas cap bluprint
Post by: maverick9611 on December 31, 2024, 08:42:18 AM
i made the sad mistake of taking apart my 85 cap cap, didn't realize the gasket is really a oil seal. now, can't get it back together. i have got it all together a couple of times but the key will not turn. it's a true finger fumble
Title: Re: 84/85 gas cap bluprint
Post by: maverick9611 on December 31, 2024, 09:28:44 AM
I got it back together but the fingers are flared out too much and I can't even get into the filler neck so obviously this is wrong
(https://i.postimg.cc/ncTtbPgX/IMG-3848.jpg) (https://postimages.org/)
Title: Re: 84/85 gas cap bluprint
Post by: fj1289 on December 31, 2024, 10:35:18 AM
If you turn the key will the fingers retract far enough to close it?
Title: Re: 84/85 gas cap bluprint
Post by: maverick9611 on December 31, 2024, 10:41:32 AM
Quote from: fj1289 on December 31, 2024, 10:35:18 AMIf you turn the key will the fingers retract far enough to close it?
no even close. the fingers have to sit like this
(https://i.postimg.cc/CLd9XsT0/IMG-3849.jpg) (https://postimages.org/)
Title: Re: 84/85 gas cap bluprint
Post by: maverick9611 on December 31, 2024, 10:49:40 AM
with two fingers being straight that means a tumble mechanism and the little springs have to be straight in a line also i presume. you can see spring intentions on the fingers that are inside the housing so I'm pretty sure this is correct. The problem is though I'm messing those springs up big time
(https://i.postimg.cc/Vv2g3Mns/IMG-3850.jpg) (https://postimages.org/)
Title: Re: 84/85 gas cap bluprint
Post by: maverick9611 on December 31, 2024, 10:50:51 AM
I cannot find one print even the service manual showing any kind of breakdown of the gas cap assembly does anybody have a print?
Title: Re: 84/85 gas cap bluprint
Post by: maverick9611 on December 31, 2024, 11:20:22 AM
I started looking at old Yamaha gas caps on eBay and I noticed all the fingers were in quite a bit so I looked at mine and noticed I can mount the finger side-by-side
(https://i.postimg.cc/Nj8hkfv2/image.jpg) (https://postimages.org/)
Title: Re: 84/85 gas cap bluprint
Post by: maverick9611 on December 31, 2024, 12:23:35 PM
all fixed. that was it
Title: Re: 84/85 gas cap bluprint
Post by: fj1289 on December 31, 2024, 12:41:01 PM
Sweet!  Glad you got it sorted - and shared it on here!