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Author Topic: what yr motor in a 74 frame  (Read 764 times)

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Offline f3racer

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what yr motor in a 74 frame
« on: March 05, 2011, 07:37:36 PM »
what year cb 750 motors will fit in a 74 frame? i have a tip on a 78 and an 80 cb750 motor, and an 83 cb900f. i wish the 900 motor would fit.
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Offline Gordon

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Re: what yr motor in a 74 frame
« Reply #1 on: March 05, 2011, 07:39:58 PM »
Depends on what you mean by "fit".  If you're looking for something that will bolt right in without modification to the frame, stick to the sohc4 engines. 
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bollingball

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Re: what yr motor in a 74 frame
« Reply #2 on: March 05, 2011, 07:45:15 PM »
Yep Gordon's correct they all can fit just depends on how much you want to make it happen. But I think it will look and sound better with a SOHC4 that is why I am on this site ;)
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bollingball

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Re: what yr motor in a 74 frame
« Reply #3 on: March 05, 2011, 07:47:45 PM »
If your tip on the 78 motor does not work out for you I would be interested please PM me. Is it a K or F motor?
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Offline Stev-o

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Re: what yr motor in a 74 frame
« Reply #4 on: March 05, 2011, 07:52:29 PM »
The '78 motor will bolt right in. [Last year of he SOHC]
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Offline MCRider

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Re: what yr motor in a 74 frame
« Reply #5 on: March 05, 2011, 08:23:10 PM »
Quote from: Stev-o on March 05, 2011, 07:52:29 PM
The '78 motor will bolt right in. [Last year of he SOHC]
The engine will drop in but... I think there is an alignment of the sprockets issue. Also the final drive of the engine is set up for a 630 chain abnd the rr sprocket is a 530 chain. I know this can be worked around but it takes a lttle effort and some parts.
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Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."
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