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<blockquote data-quote="timetraveller" data-source="post: 19129" data-attributes="member: 456"><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">I have just had a private message pointing out that my advice above might cause some troubles. The problem pointed out to me is that it depends upon what oil was used when the bike was last run as to just how much sludge there might be in various bits of the engine. If a highly detergent modern oil was used now and a straight oil had been used earlier then that sludge would be loosened and could cause trouble. So how best to proceed? Try putting a long screwdriver down the oil tank filler neck and gently scraping the bottom of the oil tank before starting the engine. Look at the end of the screwdriver. If it has a good coating of sludge then it is likely that the rest of the engine internals are similarly covered. If it comes up clean then perhaps old oil such as Filtrate was last used. It would certainly be a good idea to remove the oil filter and have a good look at both the oil which comes out and carefully check the filter. You might be in for a shock! If there is a lot of evidence for sludge and other contaminants than you will probably have to use modern straight, non detergent oil. Put in a new filter in any case and be prepared to run the engine for a while and then replace all the new oil and filter if it looks really dirty. As mentioned above, oil down the push rod tubes is also a good idea.</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">It was also pointed out to me that I wrote “remove both plugs” but the engine might be a single. If it is, and does not have twin plug heads, then remove just the one plug.</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">One thing which I like to do when an engine has not been run for a long time is to turn the engine over a lot with the kick starter without the spark plug in to start to get the oil circulating. This is even more important if the oil filter has been changed. If you have access to either a long hill, a bit of private land where the bike can be towed in gear or a modern battery powered starter as used by the racing boys to turn the rear wheel then that is an easier way of getting the oil circulating. Once again good luck.</span></span></p></blockquote><p></p>
[QUOTE="timetraveller, post: 19129, member: 456"] [FONT=Times New Roman][SIZE=3]I have just had a private message pointing out that my advice above might cause some troubles. The problem pointed out to me is that it depends upon what oil was used when the bike was last run as to just how much sludge there might be in various bits of the engine. If a highly detergent modern oil was used now and a straight oil had been used earlier then that sludge would be loosened and could cause trouble. So how best to proceed? Try putting a long screwdriver down the oil tank filler neck and gently scraping the bottom of the oil tank before starting the engine. Look at the end of the screwdriver. If it has a good coating of sludge then it is likely that the rest of the engine internals are similarly covered. If it comes up clean then perhaps old oil such as Filtrate was last used. It would certainly be a good idea to remove the oil filter and have a good look at both the oil which comes out and carefully check the filter. You might be in for a shock! If there is a lot of evidence for sludge and other contaminants than you will probably have to use modern straight, non detergent oil. Put in a new filter in any case and be prepared to run the engine for a while and then replace all the new oil and filter if it looks really dirty. As mentioned above, oil down the push rod tubes is also a good idea.[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]It was also pointed out to me that I wrote “remove both plugs” but the engine might be a single. If it is, and does not have twin plug heads, then remove just the one plug.[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]One thing which I like to do when an engine has not been run for a long time is to turn the engine over a lot with the kick starter without the spark plug in to start to get the oil circulating. This is even more important if the oil filter has been changed. If you have access to either a long hill, a bit of private land where the bike can be towed in gear or a modern battery powered starter as used by the racing boys to turn the rear wheel then that is an easier way of getting the oil circulating. Once again good luck.[/SIZE][/FONT] [/QUOTE]
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