SOHC.co.uk Forums > CB750
Project bike
Waggles:
Hi all, as per my entry in the new members forum heres a pic of my barn find project F1 ( provided I have attached it OK! ). It has low mileage and has been standing since 1985. Pic makes it look a lot nicer than it is, all the chrome items are shot :( paintwork is very nice tho.
First snag, exhaust stud has sheared while trying to attempting to remove exhaust. I soaked all nuts overnight in releasing fluid but such things are bound to happen on a bike that has been standing so long. Anyone removed one of these studs successfully? I plan to try releasing fluid and mole grips while applying heat as I assume it is a steel stud directly in alloy, sound like a plan?
Spitfire:
Hi, that looks a nice one, I had the same problem of a broken exhaust stud on my F1, I tried soaking it in all sorts of strange materials, I tried heating it, I tried freezing it, and I tried using a "posh" extractor on it. All to no avail. In the end it was a case of head off and get it fixed properly.
Here's my experience, hopefully you will be a lot more successfull !
http://forums.sohc4.net/index.php?topic=10036.msg93798#msg93798
Cheers
Den
Waggles:
AAAAAaaaaaaaaargh! thanks for that Spitfire! Mine is exactly the same! same stud and broken off at base of nut just as yours did. My motor is still in frame and being low mileage I didn't want to take it out at this stage but maybe I should just cut my losses now.
I guess if you think about it if the damn thing didn't just unscrew anyway when the nut was seized and would rather twist off the steel what chance do you stand?
I might have a little go just in case but am not going to waste too much time.
As a matter of interest how was your eventually removed? or was it drilled / helicoiled?
mick:
Hi Waggles, i saw your bike advertised @ oxford classic honda, looks like a very nice unmolested & original find 8),, you might be lucky and with patience you might get the stud out with out drilling, i would try heat & double nut method, or weld a nut to the end of the stud and try that method?, keep us posted with how you get on, cheers Mick.
Waggles:
Thanks Mick, yes, got it from Oxford. Strangely I went to look at the 550's he had but the F1 rang too many bells and I had to rescue her. She is totally original except the exhaust. Spookily in 1976 I went to Costins Honda in Southend looking for a secondhand 500 and came out having bought a new yellow F1. History repeats.
Will have a go at the stud, all the others are fine but am not going to lose too much sleep over it, am looking up 'spark erosion' even as we speak ;)
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