550 Katana 750 engine ?

[barrykatona]

Decided that the engine on my 550 Katana ptoject is goosed so will locate a new motor. Can anyone help with the following questions to aid me in my search.

What other gs550's models/year's have the same engine ie. no kickstart and 6 speed box?

or what are the downfalls of perhaps sticking a Gs750 motor in there presuming of course that it would fit. frame strength brakes etc

Ohhh the possibilities.

nice pick of original ignition/points cover

[Steve]

Can't answer all of your question in detail, but I am under the impression that any year 550 should fit. Kick starters ended in 1979.


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[Ironriot]

Kick starts are so bad ass. I wish my 81 had one. I don't really know the details about engine size and what the compatability is but I do know that the 850 has a 5 speed gear box so thats out of the question. My best guess is that a 750 should fit in there. But oh imagine the possibilities of gs1000 engine in there \\/

[barrykatona]

I think Gs1000 engine might be taking it a bit far how would I stop and would the frame hold up to it??????????

Besides would it drop in without frame mods?

[Ironriot]

1. My best bet would be no. From what I've heard these frames already come pretty weak.
2. I honestly doubt it but I could be wrong.

And as for stopping it would be a good excuse to throw some late model braking gear of a gsxr on your bike

[brveagle]

750 will NOT fit without alot of welding/modifying.

The 650 chain motor will fit with very little work.



Or you could be like me and turn your 550 into a 740cc motor.

[emjay]

There's a member here, I forget his name, who put a 650 head on a 550 motor. I believe it's got all the same dimensions except for the stroke, even the 550 exhaust matches. I think all the tags still say 550 so it's a bit of a sleeper.

[t3rmin]

There's a member here, I forget his name, who put a 650 head on a 550 motor. I believe it's got all the same dimensions except for the stroke, even the 550 exhaust matches. I think all the tags still say 550 so it's a bit of a sleeper.

That would be the member who posted in this thread right before you... :-D