Yamahas, Laverdas, Traditions and More

Reader Contribution by Motorcycle Classics Readers
Updated on April 11, 2024
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courtesy of Lloyd Smith

XS750 improvement mods

Thanks for the article on the XS750. I bought one new in early 1978 as the improved SP version came out in preference to the ubiquitous Honda, Le Mans 1, BMW etc. offerings at the time, and in preference to the XS1100, which we [South Africa] seemed to have gotten a year earlier than the U.S. The 1100 was just too heavy for my 75kg weight and it had horrible handling in the twisty stuff. I still have my XS750 and it remained my favorite street bike in my collection until the Guzzi V85TT appeared a few years back.

There were two things I didn’t like on the new XS750. The second-gear-issue, which I had fixed under recall by the agents, but also the rear shock absorbers had too little compression and rebound damping for sporty riding and were soon replaced with a pair of linked S&W air shocks, which made a world of difference and were easily adjustable for load with an air valve.

The bike still runs extremely well. In the first 20 years, the only other issue was a leak on the rubber seal on the rev-counter-cable-drive which was fixed for cheap and a tiny bit of wrench time. Fifteen years down the road, second gear began to cause issues again and I took the opportunity (while the cases were split) to modify the selector clearances and refresh with XS11 pistons, rings and bearings. I put new diaphragms in the petcocks while also adding heated grips and a bikini fairing. The XS11 pistons with the XS750 head gave higher compression and a lot more torque, now a nominal 850cc. It would have been a great factory mod. I haven’t put it on a dyno but would estimate around 80hp now.

It’s a lovely bike that I enjoy riding. The next thing I will tackle is the brakes, which were good (not excellent) in 1978, but are far behind a modern bike’s, and need fettling to be safe in today’s traffic conditions.

Ian Huntly/Lanseria, South Africa

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