SOHC.co.uk Forums > CB750

F2 Engine

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kifer:
Hi All, I have acquired a 750 F2 motor which I will use at some point, The thing is it has been sat in a dry garage for about a year,
I know it has only 19000 on it and has never been touched all original screws etc complete with carbs etc. Other than putting it in a frame to try it what would you do to check it over?

mick:
Hi Tom, i would take the sump and rocker cover off and have a look in both ends while you have the chance, cheers Mick.

Waggles:
My F1 was a low mileage barn find. I was loathe to take the motor out and strip it because of the mileage and I knew the general reliability of the motor. I took off sump and cleaned it and oil strainer, stripped clutch to 'unstick' it and check for rust ( there was none ) I replaced all service items and coils but as far as the motor goes all I did was pump some 20 - 50 oil for 'old motors' I got from Halfords around it ( plugs out and whizz on starter until oil light goes out for a bit ) and left that in there while I dealt with brakes etc. Reason for this was it has a 'seal swell' additive I thought would be a good idea, I also put a little redex down the plug holes. Changed the oil for 'proper' 10 - 40 before starting. Apart from a rather large cloud of smoke as she coughed 25 years of crud from her innards she now runs beautifully ( 'so far' he says touching wood etc ) I intend to change oil pretty frequently to begin with and keep an eye on the sump for rust but apart from that I will just ride and service as normal.

kifer:
Thanks Lads, I will take your advice and do the checks as you say, I can toss some oil over cams before turning it over.
Was thinking about mounting it in a stand [ easier to store ] connecting up oil tank, turning over on battery then put meter on oil switch, I know it won't start but you do get a feel for them when they are turning over. What do you think about doing this ? I know it will be next year before it goes in a frame not even sure what next build will be like, want to build a MY BIKE a thing I have not done yet and age is not on my side  ;) so needs to be done. Thanks Again.

Bryanj:
Sorry to disagree but if its the Black engine F2 and it's done 19000 from new and never been touched the exhaust valve guides will be shot

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