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SOHC.co.uk Forums => CB750 => Topic started by: Sam Johnson on September 21, 2007, 12:17:41 PM

Title: Will F1 motor fit into K2 Frame?
Post by: Sam Johnson on September 21, 2007, 12:17:41 PM

Gents,

I have got my hands on an F1 motor in good condition, my question is
will it fit into the K2 frame and what do I have to do to fit the original
4 into 4 K2 pipes to it.

Also any ideas as to get the motors in and out of the frames would help.

Kind regards
Sam

Title: Re: Will F1 motor fit into K2 Frame?
Post by: mick on September 21, 2007, 01:32:58 PM

Hi Sam, yes the F1 motor will fit in the k frame , you will have to take out the 8 exhaust studs and replace with the 4 exhaust stubs & 8 posi head screws, i have done it with my 1970 cb750, as for getting it in & out me & my son have got it down to a fine art just lifting them in & out others have used trolley jacks with some wood under the motor so you don't bugger it up ;),  cheers mick.

Title: Re: Will F1 motor fit into K2 Frame?
Post by: mick on September 22, 2007, 09:35:07 PM

Hey Sam, how you getting on with the engine change?   cheers  mick.

Title: Re: Will F1 motor fit into K2 Frame?
Post by: Sam Johnson on September 23, 2007, 02:19:09 PM

Mick,

Got the one out of the 'donor' F1 - cut the frame away!!!!

Engine is now on the workbench and I have just managed to remove the exhurst studs with heat, diesel and gentle tapping.
and of course the old '2 nuts - well in this case 3 nuts method'
I will now try and check over this motor to make sure it IS in better nick than the one it will replace.

I will try a plug chaser down the iffy number 2 plug on the current motor and see what that does, then get that motor running
right - if not then its SWOP time. I don't think I will be cutting the frame to get it out, how did you get the exhurst 'STUBS' out on
your K2?  I am told they are held on by cross head screws (must chew up very easy).
Thanks for your interest.
Were abouts in Lanc's are you? I live just outside Warrington.
Sam

Title: Re: Will F1 motor fit into K2 Frame?
Post by: mick on September 23, 2007, 04:24:22 PM

Hi Sam, i'm in Lancaster just up the road from you , you will probably need a impact driver & some patience to get the exhaust stub screws out , cheers mick.

Title: Re: Will F1 motor fit into K2 Frame?
Post by: Spitfire on September 24, 2007, 06:53:24 PM

Hi Sam,
         I have a large metal philips T bar, I usually put it on the screw, hammer like hell for a while and then use leverage, they generally come out !
I live just down the road from you in Great Sutton.

Cheers

Den