750/1000 engine swap

[Guest]

Does a 1000 engine fit straight in a 77 750 frame? Is the sprocket offset the same?
Cheers.

[petrolhead]

It is a tight fit.
The brackets at the bottom in the middle don't line up.
(I had some long nuts welded in the frame)
The front brackets need to be made as well as the rear at the top.
Basically you can only use the rear supports at the bottom, they line up with the casing and give you a reference for chain alignment.
It is hard to lift the oil sump over the rear bracket (fixed to the frame) because the 1000 engine has a larger volume at the rear/bottom.
Also the engine is a little shorter.
You can move the engine forward but you will need to make the bottom rear brackets and loose your'e reference point.
Either way you'll have to make most brackets.

[GregT]

Take the opportunity to remove redundant brackets and stiffen the frame while you're in there.

[bsharpish]

Any oil cooled suzuki would be an easier swap as its a much more compact unit - yes you'll still need brackets though
PLUS -
Lighter
More power
NO reg/rec issues

On a 750 - I'd pick up a cheap 750 faux Katana and butcher the ugly pig

Hey presto - 85-90 HP and at least 30-40lbs lighter plus easy spares - newer loom, carbs and ancillaries too