Gear Clusters

motoddrob

motoddrob

Hero member
Location
S/W Australia
Just pulled the head/barrels off the 1200 and and while doing so noticed quite abit of play on my countershaft sprocket and spline. Remembering that I have a spare set of gear clusters in one of my boxes I dug it out and this is what I found!!!
P1140076.jpg


They were perfect when I wrapped them, oily, in towels then plastic garbage bag, then plastic storage box. They were sitting next to a set of cams also wrapped in a towel but not in plastic bag.
The cams were rust free.
So are they salvageable/useable?? was hoping to use the spline end to replace my worn one.
When I first spotted them I swore quite abit!! Bugger!!!
 
I have used Deox C to remove surface rust, but maybe there will be pitting in the gears and shafts, so not good for longevity methinks.
 
I'll be interested in the replies to this because in my ignorance I would myself (apart from the bearings) happily clean them up and use them but I dont have the expertise to know whether that course of action would be correct or not. Time for the experts to step in.
 
Strip the shafts and give everything a good whizz up on a rotary wire brush then have a close look, you will most likely find it is only surface rust and the pinnions are perfectly useable. Pop a new fourth gear bush in while you are about it.


  Keith.
 
Gee I hope your right there Keith. I've just dropped them into the oil I drained yesterday before pulling the motor and wrapped them up in towels again.
I'll get the wire brush out next week and see how they come up.
 
Rob, used engine oil contains acids from the combustion process. Sure you knew that anyway. P
 
Hi Paul, yeah I knew that. Use to cost me a fortune in oil. When I was based in Hong Kong I would fly back to Perth couple of times a year and take the lavs for a short blast. Always started with fresh oil,
ride a couple of hundred kays, then it was drained and refilled with fresh oil, then drained and refilled on the next ride.
I'm off to Perth tomorrow for a week and will strip them when I get back. Wire brush them as Keith suggested. The oil I dropped them into has only done 200km, was convient and I just couldn't leave them as there were without doing something.
 
I recently fitted a crank from a wrecker.it had been removed from the crashed bike about 25 years ago, it was slaverred in used oil, from the motor in came out of and closed up in a heavy duty polythene bag, tied with wire, this was thhn stored in two damp sheds, (not mine) whereby, the outside of the bag got very grubby and grimey, once opend up on a nice clean cotton sheet the crank came out looking pristine, so I used it, still not sure if it is straight though since I have been toiling to rectify an annoying oil leak from the inner alternator gasket (Bosch type)
CLEM
 
Tanks on hold Grant, run out of epoxy and carbon cloth Also want to add a couple of layers kevlar as well.
Off to Perth tomorrow to restock on everything. Credit Card gunna get hammered big time :o
 
Rob,
try molasses - great rust remover and being out in the country quite cheap as used as food additive/supplement for animals, especially horses (I am told).  Can be re-used of strained, but as cheap, can be disposed of without harming the environment.
 
Hi All, I've found a supplier of DeoxC in Perth so will give that ago when I get my grubby hands on some. Never thought of molasses as a rust remover though, good tip!
 
Wouldn't bother with the chemicals Rob, just hit the gears with a rotary wire brush. It will get them clean clean and remove surface rust at the same time.


  Keith.
 
I bought a pair of floating discs once. They were full of surface rust. The guy wanted to gibve them a light skim to clear it but Isaid to just leave them. Dunked them in a bath of Deox C solution for a few hours (hot water accelerates the process) and once I wiped off a grey scum from the discs they came out almost like new. There is no physical attack on the metal, no eating it away and no scoring as may happen with any mechanical device. It is based on Citric acid, relatively mild and you can pour it down the drain when it is used up.
I also use Coca Cola for brassware and alloy cleaning.
Another one is HP sauce. Used to clean up old coins lovely.
 
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