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Message: <blockquote data-quote="mike in idaho" data-source="post: 103374" data-attributes="member: 468">I've done it, the 1100 motor doesn't just fit in without a few changes. The ignition pulse generator assembly interferes with the frame crossmember under the tank and the front of the swingarm. I had to cut the frame tube and swingarm for clearance.Re-inforced the back of the frame tube and boxed the hole in the swingarm with some plate afterwards. It will bolt right in if you remove the pulse generator from the back of the motor and use the head-mounted ignition from the 1000 engine. I have an '83 engine, a lower first gear and higher fifth gear than the earlier 1100s. With the 3.40:1 ratio in the 1000 rear first gear is low enough to handle the sidecar quite nicely, fifth is still slightly taller than the original GL1000 setup.</blockquote>