Exhaust Studs

[Dead Eye]

Hi all, what size are the exhaust studs? I can't for the life of me remember and I don't have a paper copy of the haynes (digital copy doesn't say). I'm fairly sure they are M10 but wanted to confirm before purchasing

[GrahamB]

Don't own a 600 but certain that all the Yamaha's I have ever owned have had M6 studs both ends or M6 one end & M8 at t'other. M10 seem huge for exhaust stud to me?  :eek

[darrsi]

http://www.ebay.co.uk/itm/Yamaha-FZS600-...3687481%26

[ade the blade]

m6 and torqued to 10 Nm

[red98]

m6........10mm would be the size of the nut o/d or spanner/socket size 

[Dead Eye]

You see, I knew 10 came in somewhere  :lol

[gordon]

hi  i,v got 92 nuts here in stanless steel if u message me i,ll post some down to you or go to screw fix a bag of 100 will cost you no more than £5

[Dead Eye]

Thanks for the offer gordon, very generous of you, but my eagerness took over last night and I already have some on order. They were only about £3 or £4 so not too much to worry about

[bozboz]

Incase this helps anyone. I recently changed my rotten studs using 8 stainless hex bolts. I just dremeled off the ends, the size I used was M6x35. Standard exhaust studs measure M6x30ish, the extra 5mm really helps when putting the headers back on, just make sure the thread is good both ends before putting them in the head.

[Dead Eye]

Right, instead of opening a new topic on basically the same issue, I've managed to snap off the nuts on 6 of the 8 studs. The ones that snapped required so little effort compared to the two that behaved that I just had no chance of not snapping them really - they appear to be the originals and the bike has 84k on the clock so...

I popped out to B&Q this morning and bought some M6 nuts at the advice of red98 (damn delivery hasn't turned up for some others I ordered) and attempted the whole tighten two of them together to be able to remove the stud. No such luck, the stud is stuck fast and the nuts are just grinding away their thread (the stud seems less affected thankfully).

My only choice now is going to be to drill them out, right? Does anyone have any other advice... or a drill with decent bits? I'm otherwise rather buggered. I can pay in beer tokens

[red98]

morning deadeye.......just read bozbozs post regarding the use of 6mm bolts.are you sure you have ordered the right studs as looks like he did the job with 6mm......with 6 broken studs it might be easier to remove the engine to do the job  :eek :eek :eek .......have you tryed a stud extractor ?

[Dead Eye]

The studs I've ordered are proper replacements, but they won't be here till next week I expect. I was attempting to get the old studs out but they are having none of it

I may be able to do it with the engine still in place (might be fiddly) as the only thing that appears to be significantly in the way is the radiator. If it comes down to it, I'll just have to remove the engine which will be a whole lot of fun I imagine - can't be worse than a cage gearbox swap surely...

I haven't actually looked at any stud extractors (didn't cross my mind) so I guess that's my next move.

[red98]

these extractors are bulky tools ,you might not have enough room 

[Dead Eye]

Well it was going well... managed to go buy myself a stud extractor set, first one came out easy, next one snapped off with only 1 or 2 mm of the stud left outside of the head  :'(

[red98]

your not having a lot of luck there matey  ...another option for you...the studs that have broken off close to the surface cound be removed with an "easy out" its like a tapered, left handed screw.drill a small pilot hole and wind the "easy out" in anticlockwise,when it tightens all being well it will unscrew the stud and not damage the threads in the cylinder head 

[Dead Eye]

Yeah, I've seen some sets like that as well, but the cheap ones are crap and the good ones are bloody expensive

Oh and me, luck, since when? This is news to me...

[GrahamB]

You might have to take engine out but have you tried welding a nut to the remaining piece of exhaust stud? Failing this it's drill out job but you need to be very accurate with drill centre. Feel for you. Just had to remove my old FZ750 engine to have 1 lousy stud drilled out.  :'(

[Dead Eye]

I don't have that sort of kit I'm afraid - even before the garage fire I didn't have a welder and the drill I had has been totalled

Looks like I have two Fazers that are busted, bloody typical. Time to try and remove the engine I guess, anyone fancy lending a hand?

[His Dudeness]

ring around a few local welding companies and see if you can get a price for someone to come out to you and remove them.

[Easy Rider 13]

excuse my stupidness...
are these the bolts that hold the downpipes to the engine?
dont know what mine look like as they are just RUST :\