You have to remember, most any of these cars were built to a price and all were designed to be used up and thrown away. A turbocharger may be great but are costly to replace and their lifelines are dependent on how well an owner maintained the vehicle which had turbochargers . Warranties protected the original owner, but how well did the original owners maintain their cars after warranty. Turbochargers were meant to be used, but many owners didn't follow recommended procedures for shutdown nor the types of oils to use. A turbocharger has moving parts and because of that, they WILL wear out, no matter what. An engine must be idled for awhile, if it has a turbocharger, before it is shut down. If an engine is shut down before temperatures have stabilized, the oil remaining in the turbocharger and it's oil supply and return lines will coke up and eventually cut off lubrication of the turbocharger. Premium motor oils were always the best to use, like Mobil 1 which was recommended, and today we have many great synthetic motor oils to choose from.
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I've still have my 1977 Suzuki GS750B, which I bought new. I haven't ridden it since 1995 when the CA-DMV lost the insurance certificate so I never received my tags. Anyway, it was about time that I put it away for awhile. There wasn't a week which had gone by that I didn't break 100 mph. A little history about the model. Although there wasn't an actual "A" model, the early editions had different carbs and possibly cams, so they couldn't keep up with me. My bike was about equal to the Kawasaki KZ-1000. In 1978, the new GS750 was noticeably slower and even the GS850 was slower than my bike. Probably with the introduction of the GS1100, it had to be the fastest bike at the time and they didn't want to show it up by a lesser bike.
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