Where does the rad cover top bolt screw to? SORTED THNX!

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JonW
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Where does the rad cover top bolt screw to? SORTED THNX!

#1 Post by JonW » Sat Mar 28, 2020 8:42 pm

In this pic, item 20:

https://www.partzilla.com/catalog/yamah ... iator-hose

This bolt doesnt have any where to screw to on my frame or rad, what am I missing?

From what I can see:

- no hole on rad for this screw and all the rads are the same on RZ all years (tho us model is diff part number, probably sight diff, but EU and AU etc models are same 29L parts from 83 til 95sh)
- the frame doesnt have a fixing for it
- its like it screws thru the cover and then sticks out behind the rad top mount to stop it coming off, but that is not very yam as not a good solid solution
- the cover has a slot where this bolts thru, not a hole, so it only tightens and grips this cover with its wide washer, leaving the bolt on the bike when you remove the cover.
- The bolt in the parts book also has no nut shown, so I reckon there must be something it screws to that isnt shown, perhaps the frame? but I dont see anything on my frame...

Anyone with an OEM 83/84 (and US85) care to comment?
Last edited by JonW on Sun Mar 29, 2020 5:13 am, edited 5 times in total.
80 XT500 Supermoto!
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82 RD350LC decapitation project
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nokturnal
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Where does the rad cover top bolt screw to?

#2 Post by nokturnal » Sat Mar 28, 2020 9:28 pm

Maybe a US model thing?

To mount this weird tube to?

Image

Can someone in the US enlighten us?
:smt017

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JonW
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Re: Where does the rad cover top bolt screw to?

#3 Post by JonW » Sat Mar 28, 2020 9:30 pm

Sadly not I fear Dana, Im sure its to hold the top of the rad cover on, otherwise it would fall forwards as the bottom of the cover is only held on grommets to the frame... and then bolts to the belly pan as well of course. If you dont have the top bolt in, then the belly pan isnt held other than the frame grommets on the rad cover and two side bolts, which it could rotate round. :smt017
80 XT500 Supermoto!
81 RD350LC Resto
82 RD421LC Hybrid
82 RD350LC decapitation project
82 RD250LC JDM '251LC' YPVS
83 RZ350 Resto
84 RZ500 Resto
85 RZ350 F1 Resto
86 RZ350 F2 Resto
86 RZ350 F2 Hybrid

Like Watches? www.PloProf.com & www.DeskDivers.com

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kobra
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Re: Where does the rad cover top bolt screw to?

#4 Post by kobra » Sun Mar 29, 2020 1:21 am

There is a small tab on my frame with a welded nut.

I recall the factory screw being a hex screw with captured washer, maybe a lock washer too.

Image

Image

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JonW
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Re: Where does the rad cover top bolt screw to?

#5 Post by JonW » Sun Mar 29, 2020 2:45 am

Ah ha! Thanks so much!

Soo... I thought this was missing on my frame... but it was just hidden by the cover when i put it on. LOL.

Hmmm... The joys of working on a bike pushed up against a wall and you cant see the other side lol Now ive been round there and pulled the cover away i can see it. phew! I thought it might have been blasted or cut off. :smt018

Ahh well, mystery solved. :smt023

Thanks for all who helped! I have never been an LC2 fan so never worked on one, only LCs and the F models. Learn something new everyday :smt001
80 XT500 Supermoto!
81 RD350LC Resto
82 RD421LC Hybrid
82 RD350LC decapitation project
82 RD250LC JDM '251LC' YPVS
83 RZ350 Resto
84 RZ500 Resto
85 RZ350 F1 Resto
86 RZ350 F2 Resto
86 RZ350 F2 Hybrid

Like Watches? www.PloProf.com & www.DeskDivers.com

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kobra
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Re: Where does the rad cover top bolt screw to? SORTED THNX!

#6 Post by kobra » Sun Mar 29, 2020 5:45 am

Glad you figured that out! Haha.

I was thinking up a solution for you. Something with a right angle bracket to sandwich between the rad post and frame grommet.

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JonW
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Re: Where does the rad cover top bolt screw to? SORTED THNX!

#7 Post by JonW » Sun Mar 29, 2020 9:11 am

Yes I was thinking the same and then I thought...'you need to have a good look, even tho its a nightmare to get round there... ' hmm... result tho! haha.

Thanks for your super pics. They really helped me see what i needed to look for. very much appreciated mate. :smt023
80 XT500 Supermoto!
81 RD350LC Resto
82 RD421LC Hybrid
82 RD350LC decapitation project
82 RD250LC JDM '251LC' YPVS
83 RZ350 Resto
84 RZ500 Resto
85 RZ350 F1 Resto
86 RZ350 F2 Resto
86 RZ350 F2 Hybrid

Like Watches? www.PloProf.com & www.DeskDivers.com

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nokturnal
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Re: Where does the rad cover top bolt screw to? SORTED THNX!

#8 Post by nokturnal » Sun Mar 29, 2020 9:43 am

I’d still like to know what that tube is...
:smt017

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Re: Where does the rad cover top bolt screw to? SORTED THNX!

#9 Post by kpke » Sun Mar 29, 2020 10:32 am

Hmmm. On that low res yellow bike photo, that's an oddity. It doesn't belong there not even as part of the US smog system. We'll never know unless we get a much clearer photo.

Glad you got it easily sorted Jon.
nokturnal wrote: Sun Mar 29, 2020 9:43 am I’d still like to know what that tube is...

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Re: Where does the rad cover top bolt screw to? SORTED THNX!

#10 Post by 85RZwade » Sun Mar 29, 2020 1:25 pm

Maybe I'm just not seeing the weird tube you're talking about...do you guys mean the wiring harness trunk that passes out of the frame, past the upper radiator cover screw and up into the headlight?
85 RZ350 daily rider Toomeys, FZ swinger & wheel, Fox shock, Raasks
85 RZ350 JLs, FZ swinger, Katana rear & CBR929 front wheel, CBR600F4 forks & brakes
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nokturnal
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Re: Where does the rad cover top bolt screw to? SORTED THNX!

#11 Post by nokturnal » Sun Mar 29, 2020 1:29 pm

85RZwade wrote:Maybe I'm just not seeing the weird tube you're talking about...do you guys mean the wiring harness trunk that passes out of the frame, past the upper radiator cover screw and up into the headlight?
Bingo.

Seems Jon and I don’t know these LC2 jobbies as well as the others...
:smt017

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Re: Where does the rad cover top bolt screw to? SORTED THNX!

#12 Post by 85RZwade » Sun Mar 29, 2020 1:32 pm

That's a relief, I was afraid my eyes were getting worse!
85 RZ350 daily rider Toomeys, FZ swinger & wheel, Fox shock, Raasks
85 RZ350 JLs, FZ swinger, Katana rear & CBR929 front wheel, CBR600F4 forks & brakes
75 RD350 Ritter-tuned top end, PWK28s, JLs, HPI, TDR wheels, GSX-R forks, Motolana swinger

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Re: Where does the rad cover top bolt screw to? SORTED THNX!

#13 Post by kpke » Sun Mar 29, 2020 2:13 pm

Okay. I'll buy that. I don't think any of mine are quite out there on display as much as that one is.

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nokturnal
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Re: Where does the rad cover top bolt screw to? SORTED THNX!

#14 Post by nokturnal » Sun Mar 29, 2020 3:11 pm

Thought it was a little low, myself... hence the confusion
:smt017

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kobra
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Re: Where does the rad cover top bolt screw to? SORTED THNX!

#15 Post by kobra » Sun Mar 29, 2020 3:13 pm

Yea it's supposed to be tucked behind the cowl stay but that one is hanging low.

Image

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