Exhaust stud and nut

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Exhaust stud and nut

Postby s35will » 26 Aug 2010, 13:44

I appear to have completely lost one of my exhaust studs and nut from my exhaust downpipes. I want to replace it but I have no idea what size to order and where to order it from. Does anyone have any ideas? Its a 1997 Thundercat.

Also, would it be quite a simple job to replace or should I get a pro to do it?
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Re: Exhaust stud and nut

Postby 600stu » 26 Aug 2010, 14:08

the nut part number is 90179-06668-00
the stud part number is 90116-06466-00, used to be 95617-06630-00

take a look for yourself:

http://fiche.ronayers.com/Index.cfm/Mod ... up/EXHAUST

http://fiche.ronayers.com/Index.cfm/Mod ... INDER_HEAD


I would do the job yourself. Just make sure you apply the correct torque on installation.
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Re: Exhaust stud and nut

Postby bcitral » 26 Aug 2010, 16:21

And use thread lock on the stud to block side, so it doesn't come out again.
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Re: Exhaust stud and nut

Postby dangermoose5 » 26 Aug 2010, 17:53

You may want to get someone to have a look. One of mine (FZS600 2002) recently came off and needed some heat to get back on.
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Re: Exhaust stud and nut

Postby s35will » 26 Aug 2010, 20:15

Cheers for the part numbers Stu, ive been searching for weeks. You're too good at this internet lark :clap: :thumb: Its a shame that website isn't in the UK though.

Thread lock is a good idea bcitral...cheers.

Dangermoose - I think yours and mine engine is pretty much identical so i may have the same problem, cheers for the heads up.
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Re: Exhaust stud and nut

Postby bcitral » 26 Aug 2010, 20:28

How come it came loose?

If I remember on the cat its a two thickness threaded stud on the exhaust, m7 into the casing and m6 for the nuts to go onto. Be careful with them as they snap pretty easy.
Best thing I did was fit stainless pipes, as you very unlikely to take them off again. The metal one take a bit of upkeep, or they hole easy on the front two inside down pipes.

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Re: Exhaust stud and nut

Postby BimotaNick » 26 Aug 2010, 20:52

Put Copaslip on the threads, then they'll never seize.

Loctite is pointless, the heat will make it degrade.
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Re: Exhaust stud and nut

Postby s35will » 26 Aug 2010, 20:53

It went into the dealers to have the exhaust gasket done as it was blowing and then a week after I'd picked it up it started blowing again and so I had a look and a few of the nuts were loose and one was completely missing, stud and all. So can only think that after it went into the dealers they didn't quite tighten everything up properly. The dealership offered to have another look but I just couldn't get my bike down there.

It would probably be a good idea to fit stainless pipes as I've heard about the down pipes rotting on the cats pretty easily but mine seem okay for the time being and also its a '97 bike so not sure the investment would pay off.

Do you know if I need any particular tool to fit the stud or do I screw it in by hand and then tighten the nut on the end? I still don't know where I'm gonna order the part from :lol:
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Re: Exhaust stud and nut

Postby s35will » 26 Aug 2010, 20:54

BimotaNick wrote:Put Copaslip on the threads, then they'll never seize.

Loctite is pointless, the heat will make it degrade.


Cheers Nick...will do :thumb:
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Re: Exhaust stud and nut

Postby bcitral » 26 Aug 2010, 21:11

just ba pair of m6 nuts to clamp the stud.
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Re: Exhaust stud and nut

Postby 600stu » 26 Aug 2010, 23:33

Stick those part numbers in Google and find somewhere in UK selling em? Simples.

Not sure but someone else may confirm, do Jeff halls sell spares for all makes?

Also, I am led to believe smc... nah

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Re: Exhaust stud and nut

Postby bcitral » 27 Aug 2010, 08:45

Again local board user vinny at www.stuff4bikes.co.uk

Sorry if anyone conciders it as spam.
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