Snap!

[Morespeedvicar]

20 years a corrosion doesnt help either, just a shame factories dont grease stuff....Bolts always snap just one a them things unfortunatley.
Cheers
Ian

[xivlia]

what to do:- buy some copaslip (anti-seize compound made from copper) put it on thread, screw thread in, thread will never brake job done =D its also got 1100c temperature resistance, so can be used for exhaust screws too since they are the most likely things to actually snap in these bikes. 20 years of salt, water and other shit doesnt help these screws at all.

[pip]

what to do:- buy some copaslip (anti-seize compound made from copper) put it on thread, screw thread in, thread will never brake job done =D its also got 1100c temperature resistance, so can be used for exhaust screws too since they are the most likely things to actually snap in these bikes. 20 years of salt, water and other shit doesnt help these screws at all.

Don't worry about that. My pet hate is chewing on with manky siezed, snapped fasteners. I'll never be accused of being tight fisted when it comes to coppaslip, waxoil, penetrating fluid etc

Pip

[speedy231278]

I plaster threads and the underside of heads in copper grease. Eventually it stops working. Every time I have the pad pins out on the front brakes to clean the calipers and pads I put the whole lot back together with the stuff, and almost every time the damned pin covers have seized in place and take silly effort to get back out! I guess it would be worse without! Wouldn't be seen without my trusty half litre pot of the stuff....

[Neosophist]

I plaster threads and the underside of heads in copper grease. Eventually it stops working. Every time I have the pad pins out on the front brakes to clean the calipers and pads I put the whole lot back together with the stuff, and almost every time the damned pin covers have seized in place and take silly effort to get back out! I guess it would be worse without! Wouldn't be seen without my trusty half litre pot of the stuff....

Interesting.

Theres a lot of salt on the uk roads so I think this aids corrosion of aluminium calipers.

The plugs are steel right? So perhaps some kind of chemical reaction taking place too.

[speedy231278]

I think so. In actual fact, the presence of salt isn't really the main issue, simply an additional irritant. If you have two dissimilar metals in contact or near contact and an electrolyte (ie rainwater) then electrolysis happens. You don't need electricity like when you did that thing with the copper sulphate and copper strips in chemistry - the dissimilarity of the metals does that. All you need is two metals that react with one another (somewhere there's a big table of the most to the least reactive metals, and the further apart two are on the list, the easier one will corrode the other), and voila!, a bit of rain sets it all off. Stuck plugs.

Then the salt turns all the ali to shite on the outside just to rub it in!

[pip]

I plaster threads and the underside of heads in copper grease. Eventually it stops working. Every time I have the pad pins out on the front brakes to clean the calipers and pads I put the whole lot back together with the stuff, and almost every time the damned pin covers have seized in place and take silly effort to get back out! I guess it would be worse without! Wouldn't be seen without my trusty half litre pot of the stuff....

I have stopped using copper slip on brake pins (threads), waxoil all the way
Slap a load on the threads before inserting, then again on top of the hex head then insert the cap, again smothered in the stuff and just to say nip 'em up - they don't need to be tight

Never ever had one sieze, despite lots of winter use & not much washing*

Pip

* Not on the NC mind

[Morespeedvicar]

I've never had anything with sieze with copper or never seize (nickle based i think) seize up, on cars or bikes for that, but i make sure everything is mega clean before i grease it, if theres rust or oxidation on stuff before you put the grease on, it'll keep rusting no matter wats on it.
Cheers
Ian