SF2

I think you have bought a good project there Pat. Should be an easy fixer upper.
Re the brown: There’s a brown one floating around Brisbane, it came from America painted brown. I’m not sure it was originally brown from the factory or not.

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Those instrument brackets are certainly original. I bought my SF2 new, and it cracked from the bolt holes in fairly quick time. Stanco replaced them with the later type (where the clamp sits over the bars) under warranty! Certainly the only thing I ever got for free from them.
 
sergioC said:
Those instrument brackets are certainly original. I bought my SF2 new, and it cracked from the bolt holes in fairly quick time. Stanco replaced them with the later type (where the clamp sits over the bars) under warranty! Certainly the only thing I ever got for free from them.
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My story is identical to yours Serge, only difference I had to buy the later bracket. My US spec SFC also had that bracket and that broke in the first 1000 miles
 
This weekend I had a dig around the bike, I bought a new ignition key and thought well let's connect a battery and see what works. Blow me down, everything did work even the starter motor which whizzed around merrily whilst the starter clutch did nothing. I took the points cover off and half a pint of water came out but lo and behold there is a big fat juicy spark on both cylinders. Frame paint looks good, I found the original orangey gold colour on the inside of the panels, very nice. Tank is sound too. The fork stanchions are pitted so the will have to be fixed but apart from surface rust and having two left silencers it looks ok.
Today I took a look at the engine, the bores were full of some concoction the guy I bought it off had put in to try and unfreeze them so I used one of those bathroom soap dispensers to empty them, worked great. Then I took the tappet covers off, oh hell, I didn't like what I saw in there, rust everywhere including the bearings, took the primary side off, more rust and it's all over the main bearing too, heavy rust at that.
Took the other side off, once again rust everywhere. It looks like some serious condensation has been going on in that motor for many years.
The only part that has any free movement is the advance unit, nothing else has even the slightest inclination to move, even the gearchange is frozen.
Looks like the engine is just a set of casings, the rest is probably scrap.
Now what shall I do with it? Answers on a postcard please.
The funny thing is I actually like the bike, I need to find out what parts the SF2 shares with other 750's and then maybe I can start to look for things.
Spending big money having it all rebuilt is not an option.IMG_2077.JPGIMG_2075.JPGIMG_2078.JPGIMG_2076.JPG
 
Wow Pat, you've got yourself a bit of a project there.
You know if you keep going, bit by bit, the end result will be all the more sweeter.
The shot of it in the grassy field looks great
All the best with it from down here.
Cheers
Tom
 
Exmoor beast said:
Do you know why the chain snapped yet? I reckon keep going with the strip, hopefully the oil ( oil?) will have preserved the gearbox/ crank 🤞- keep goin McDuff!
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No idea yet, no casing damage or anything but nothing at all from the crank to the rear sprocket moves a millimetre, even the gear change shaft wont move. I've looked as best I could into the bores, a little bit of rust scabbing but no seizure marks. there was plenty of oil in the bike, some white slop from moisture but not a huge amount. The engine looks unmolested. I suppose that's why I buy these whodunnit bikes, just to find out.
 
No point at all conjecturating (:)) about what to do. First port of call and absolutely essential obviously, is drop the motor and strip it completely - you may find that the rust is predominantly surface and once everything's apart and has been soaked and cleaned the true state of play will be apparent. Maybe the condensation hasn't penetrated the big ends, which means the crank will be redeemable - new mains is no big deal, new bearings elsewhere is easy and relatively inexpensive. BUT! If you thought you were buying a barny that only required a change of oil, a carb clean and a new battery before firing it up and riding into the sunset, it's not looking too good! o_O
 
No I knew it was frozen when I bought it and would have to be completely stripped but I'm always fascinated when the cases are opened. Mr Nairn reckons they are infinitely repairable.
I haven't had a 750 before but I am quite impressed by the package to be honest.
 
At least chuck the bits in a tub of oil because if Italian weather does that, British weather ain't going to improve it.

Paul
 
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