Engine swap 450

[mjpauckert]

I have a 80 gs450 and I was wondering what's the biggest engine I can squeez in there? Cafe' proj. so was wondering.. Kick starter options.

[Roger P.]

GS500 motor might slip in, considering their shared origins. No kickstart though. You might be able to mix and match parts to graft the 500 bits onto a kickstart bottom end, but I'm just voicing an opinion here.

[Flaming Chainsaws]

GS500 motor might slip in, considering their shared origins. No kickstart though. You might be able to mix and match parts to graft the 500 bits onto a kickstart bottom end, but I'm just voicing an opinion here.

From what I've heard it is true. A GS500 motor will bolt right up to a GS450 frame. But the reason why no one did is because the exhaust ports of the GS500 motor will point straight at the GS450's frame tubes. I don't even think there would be enough space to fabricate a custom exhaust.

A little comparison. The GS500's exhaust port points straight out, which would go right into the GS450's frame.


See how the GS450's exhaust port points outward? And the frame is more centered.


Hope this helps.

[mjpauckert]

I was looking at older 500s and the frame looks nearly identical..

[mjpauckert]

maybee.... I live in the middle of no where so its gonna be a bugger to try and track an engine down any way..

[Runningdog]

Guy around here put a GR650 engine in an '81 GS400 (same as GS450 in the US). Nice fit, seemed to work pretty good.

[Roger P.]

Maybe a 450 head on a 500 bottom end? Suzuki parts seem to mix and match pretty well amongst other models.