John ..... back in the 80's I used to subscribe to several motorcycle magazines, and those writers knew their bikes. They did an experiment with two brand new Kawasaki 4-cylinder street bikes. Both bikes were ridden by all members of the test group over the period of a year or two and ridden under all conditions and ridden both hard and easy. One bike had regular oil and filter changes, whatever was recommended by the manufacturer. The other kept the original oil and filter. Both bikes received regular other maintenance and small fixes to keep them on the road and of course, had the oil topped up a bit when needed. At the end of the test and maybe 50,000 miles, they tore both engines down and did all sorts of measurements for wear. Bottom line is that there was not a whole lot of difference between the engines in the two bikes. I'd love to track that article down.
Meanwhile, some of the claims that people make about oil are off the charts. This oil is great andthis one is crap is nonsense if they have the same basic rating IMHO. Sometimes a person will tell us that a differrent oil changed an oil-guzzling monster into one that never used a drop of oil. Some claim they ruined six engines and then switched brands and never had a probem again. I'm very sceptical about those kinds of claims, I just flat out refuse to believe it.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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