430AE to 500ccAE

.............has anyone mated a 500cc water cooled top end onto a 430ccAE water cooled bottom end?

Am i right in thinking i would have to change the rod to a 500cc, is there any machine work involved.

Not much into water cooled Husky's, But, on say the air cooled 83's the 430 and 500 share the same engine cases. 10mm longer stroke on the 500, so if the water cooled bikes followed the same path then yes change the rod and the cylinder studs. No machine work I can think of.

Thanks Tommie, thats what i was thinking, as the 430 and 500 piston sizes are almost the same it had to be in the stroke.

Cheers

hi, you're gonna have to machine a slot in the end of the crank for the water pump drive and get the side case with the water pump in it. yes it has been done.

I looked into doing this a while ago . I think that there is a bit more to it than fitting a 500 rod & cylinder studs , although the stud pattern is the same & the 500 cylinder will fit . To get the extra 10mm stroke, the big-end pin has been moved 5mm further out in the crank webs on the 500 . It would be easier to use a crankshaft from an air-cooled AE500 & replace the left side half shaft with one from a 430AE (with the slot for the waterpump drive in it) . The AE500 left crank half-shaft is about 20mm longer than the 430AE, so you can't just machine a slot in the end of it . The 500 also has a longer skirt on the piston.