Topic: Which year k or f engines will fit in a 78 F frame?

[deftone]

i have a 78 CB750 F supersport with a blown engine now (really long story) and am looking at replacing the engine and wondering what potential options i can look towards as the 77/78 F engines are little harder to come by and not as desirable due to head problems (don't ask me how i know this)...any help is appreciated
thx
Tony

[bollingball]

77 or 78 k motor. They don't have the valve issues.

[Roach Carver]

Any sohc engine  should fit. Even a sandcast if you can find one. Output shaft length is different if i recall.

[Grabcon]

My understanding is that the motor mounts are the same the difference is in the sprocket offset. But I am not am expert in this matter.

[Jerry Rxman Griffin aka MuthaF'er]

Any but the 750A. 77/78 K and F use a 630 chain while the others use a 530 but that can be taken care of.

[Trav-i]

I also think that use of any engine up to 76 will require you to also get the carrier for that year bike to get the right chain line.

[Don R]

Yeeeep.