TOPIC:

I was looking at KZer's 77 Kz650 B engine. Will it fit into my 80 Kz550 A without any mods?

I dont think it would be a bolt in mod, the 650 motor is wider(at least the cylinder spacing is anyway), would probably work with some custom motor mounts. same as the 1000/1100 in a 650/750 idea (been done)
Scott

Does anyone know the width of a 77 650 b engine at the mounts? I'll shoot KZer an email.

I can probably measure my frame at the mounts tomorrow night if you dont have the info by then. I think Im going to be going over to my fathers shop on the wknd to drop off some stuff...

77KZ650, Thanks! That would be great.

I got a few measurements for you from my 650 frame and motor, hope they help
distance between top front motor mounts=25cm
distance between bottom front motor mounts=25cm
distance between top rear motor mounts=23.5cm
distance between bottom rear motor mounts=18cm
center to center of hole of front motor mounts=14.5cm
center to center of hole of rear motor mounts=19.5cm
center to center of hole of top motor mounts=38.5cm
center to center of hole of bottom motor mounts=35.5cm
width of cylinder block=41.5cm
width of cylinder head=43cm
these were measured with a metre stick, they should be fairly accurate, at most a 1/4 of a cm out I would think. at least it will give you an idea of how much custom work will be needed to get the mounts where they should be
Scott

If it won't fit a plasma cutter and a tig rig will make it fit !!!

Thanks Scott for posting all that info. Will compare this eve after work.