gs550 into gs450

[badgti]

guys,

just a quick question,
would a gs550 engine fit in the frame of a gs450?

[Steve]

Don't know, have not seen any reports of it being done.

My guess would be "no".

.

[Mista M]

what year 550. If 83 +, I have some measurements I took for a buddy thinking about a katana 600 swap into a 550.

[Mekanix]

Not without modifications to the frame mounts.

[badgti]

Not without modifications to the frame mounts.

major modifications? or just minor?
i found this guy who has an abandoned project and he's willing to sell me the bike at a good price, thing is, since my cyl head is really off i could do with swapping out the 550 for the 450.

[Mekanix]

Getting the engine to fit requires that you move the bottom mounts IIRC,
I once had a junk 550L and my first gs 400L. I thought about doing the same thing. But that was before I could do any fabrication work. I abandoned it because it was too much for me at the time but I later went on to put that motor into a quad... From what I remember, The bottom mounts are not in the same place. All the bolts are in the same area on both bikes with two in the back , one on the bottom, and one in front. So if you can get a few in the front and back to line up then make the rest of them work.


I'm remembering things like the exhaust being close on the outer tubes and the airbox not fitting. Its been 16 years since I was looking at the two side by side :P

You might find it easier and less of a headache finding another 450 head.

Whats wrong with yours?