Bill -
Comparing specs on the two bikes, the 305 is listed as 60mm bore, 54 mm stroke.
The 350 is listed at 64mm bore, 50.6 mm stroke.
So it sort of feels like a bit af machine work might be required to allow the fatter sleeves to fit in to the lower crankcase. As I recall the old 350 overbore to the 305 was about 3mm or so, and didn't leave a lot of meat left.
But the stroke isn't all that much different - you might need to cut a bit off the bottom of the 350 sleeves so the 305 crank doen't whack them, but there's probably plenty of cylinder there to make up for the slightly (3.4mm) longer stroke.
Plus all the stuff that Mike mentioned......
I guess it depends on how bad you want to do it.
bill
Comparing specs on the two bikes, the 305 is listed as 60mm bore, 54 mm stroke.
The 350 is listed at 64mm bore, 50.6 mm stroke.
So it sort of feels like a bit af machine work might be required to allow the fatter sleeves to fit in to the lower crankcase. As I recall the old 350 overbore to the 305 was about 3mm or so, and didn't leave a lot of meat left.
But the stroke isn't all that much different - you might need to cut a bit off the bottom of the 350 sleeves so the 305 crank doen't whack them, but there's probably plenty of cylinder there to make up for the slightly (3.4mm) longer stroke.
Plus all the stuff that Mike mentioned......
I guess it depends on how bad you want to do it.
bill
