Question re washers on Engine mounting bolts for a 1200

hmm, I find that if your engine has to come out every other season, you have plenty of opprtunity to clean up the bolts and pop some grease on when re-installing! ;)
But, hey Keith, it ain't coming out for decades now,eh? :D
Nick7
 
tch tch,Piet
reply #10
1200's with chromed hex engine cover bolts?
no, not all 1200's, the anniversarry had black socket caps.The only time black socket head bolts should be seen on a 180.
CLEM

ps now going back to stamp collecting and knitting
 
Johnny come lately again!
The reason that Stainless bolts seize to Stainless nuts is that the metal (although soft) is full of super-hard Carbide balls.
When doing up the fasteners tightly the carbides rub together causing heat, the surface rips up and the whole lot eventually becomes a molten mess, effectivelty welding the two parts together.
Any attempt to overcome this effect by doing up the fasteners even more(or even undoing) only makes matters worse. The best thing to happen then is that the bolt snaps and a new fastener can be fitted.

Anti-Seize helps the process by keeping the surface of the nut and bolt apart as much as possible.

Carbon steels are generally more durable - hence their popularity.

This would not necessarily mean that Stainless is not an option as the limits of the nut or bolt are probably far higher than the application requires. Stainless not suitable for cylinder studs methinks unless very exotic.
 
CLEMTOG said:
tch tch,Piet
reply #10
1200's with chromed hex engine cover bolts?
no, not all 1200's, the anniversarry had black socket caps.The only time socket head bolts should be seen on a 180.
CLEM

ps now going back to stamp collecting and knitting
Click to expand...

Sorry to interrupt your knitting, Clem, but all Mk II 180s are sewn together with allen bolts.....tss, tss, indeed :D

Yes, did forget the Anniversary, the ugly mutha.... but that's easy, innit?

Now don't spew your beer over the stamps!!

piet
 
I've had experience of a stainless bolt snap on my LH footpeg on my Alpino. Luckaly it happened when I set of from a stop, so I kept the bike on the wheels and did not harm myself :o.
Arne
 
Interesting comments on stainless threads galling. I'd not heard the carbide balls theory before. Although I've not had a problem with stainless threads myself I'm aware that galling can occur, but I'm not convinced that carbide precipitation s the mechanism by which it happens. Carbide precipitation in SS generally only occurs above 500oC.

It's morte likely that galling is caused by the oxide coating getting rubbed off the high points of metal, and the bare metal bits sticking together.

Cheers,
Cam
 
I had experience of galling ss threads in a previous life. M8 nylocs on  ss studding exhaust straps, guaranteed you could wind the nuts on, but you couldn;t wind them back off, if you hadn't lubed them. All parts were new and I'd try to back them off within the same day. Possible the threads on the straps were hand cut but I learnt a lesson too. Happened every time :(

I used to copper slip the threads to prevent it.
 
That shocky mount stainless bolt that Galled on me I am thinking had a heat content to it happening,it was a 10mm dia bolt with a new niloc and I was spining it on preitty fast with a socket,lots of friction with the nilock.Gave me a good scare as it was in a very hard spot to cut it off with an angle grinder but its suprising what you can do with a 3ft pipe on the end of an alan key,dodged a bullet that afternoon.
Forgot to add I shered the nut off by winding it back off to try and get it off,way to much damage winding it up and presurising the top shock mount
 
You might be interested in this article Cam, it is a bit deep: http://findarticles.com/p/articles/mi_qa5348/is_200007/ai_n21458244/?tag=content;col1

I also find that high-carbon steel bolts gall when undoing(above grade 8.8 ), especially when subjected to heat over a long period.
 
Just a litte bit of copper grease ( I actualy prefer the aluminium stuff ) goes a long way, some folks seem to spread it about like it on was free issue from the stores or something.............. ::)


    Keith
 
That will be me then!
Simon - the Copperslip Kid.
Sorry Keith!

As an alternative, Molybdenum Disulphide or Moly grease (Molypaul) is really good stuff, superior to Copperslip.
At work we use Nickel grease on Gas and Steam Turbines (the manufacturers will not let Copper Grease anywhere near their machines).
 
SimonR501 said:
As an alternative, Molybdenum Disulphide or Moly grease (Molypaul) is really good stuff, superior to Copperslip.
Click to expand...

If you really want to try something high tech, get some tungsten disulphide grease! It is available commercially, considerably slipperier (?) than molybdenum disulphide, and you get bragging rights at the pub like you wouldn't believe, even impresses 22-year old blondes with large breasts and short skirts (well, some of them) :D :D

Ken
 
The Three Dellortos said:
Fuck ME....I KNOW I AM NOT DEALING WITH DICKS !!!

   Will NOT START NOW.....
 
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Ah ha, nice to hear from you Tim!
Remember this is the staid and boring section where the Techies live.
The fast and loose section is next door.



mcnicol said:
If you really want to try something high tech, get some tungsten disulphide grease! It is available commercially, considerably slipperier (?) than molybdenum disulphide, and you get bragging rights at the pub like you wouldn't believe, even impresses 22-year old blondes with large breasts and short skirts (well, some of them) :D :D

Ken
Click to expand...

Nice one Ken, you win, I give up. There is not a posher grease about I don't think.

SimonR
 
sorry piet,series two 180's are NOT sewn together useing BLACK socket caps,you did at one time see them all over the place (cheap ones nicked out of the works stores perhaps?) and yes that 1200 annivesarry was one hell of an ugly pig.
CLEM
 
My Zane is held together with chocolate bolts,,,,,,,,,,,,,,,,,,but they screw into chocolate and plastic anyway, so its not too much of a problem,,,,,,,,,,,, as long as you use chocolate tools!.  :P

My Mirage isn't held together by anything except my imagination at present, "SIGH".
:(
 
Spider, apparently you are not the only one...  :D :D :D

" My Mirage isn't held together by anything except my imagination at present, "SIGH". "
 
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