Sir Puma Posted August 27, 2012 Share Posted August 27, 2012 Greetings. I'm a first time motorcycle owner and I recently picked up a very used Yamaha XJ650J. Now I'm not a total noob when it comes to mechanics. I'm over 40 and been a mechanic of one kind or another for most of my life. This bike has sat for a few years and wasn't in good running shape so I did some work. I dumped the remaining fuel out of the tank and cleaned the petcock fuel filter (had some bits of rust in there.) Cleaned out the carbs (had lots of very fine rust powder built up in there.) Put in new plugs. Changed out the drive line oil and just changed out the engine/transmission oil and filter. Now the manual says the engine oil should be 3.3 US Quarts (with filter change) 20W40 for temps over ~46° F. What came out was about 4 or 5 quarts of watery blackish liquid that smelled strongly of old gasoline. Now I'm hoping that just sitting for about 3 years meant that fuel somehow made it down into the gearbox. Or the previous owner was a complete morron and put fuel into the oil. But I'm wondering if I should be looking for some major wear or damage somewhere. Anyone know how fuel could be getting into the engine oil? Anyway, hello all and thanks in advance for any advice/help. Marcus Link to comment Share on other sites More sharing options...
dt502001 Posted August 27, 2012 Share Posted August 27, 2012 Hi Marcus While this should be 2 posts 1 in the new mebers section and 1 in workshop to keep the thread going .I will say this the float needle & seat should be checked as well the floats themself. Just to check they actualy float old bike like that... the floats get holes in them and no longer float. and the seat/needle can't stop the fuel. If the bike was stored with fuel and tap open and the floats didn't stop it from running in then It only has 1 place to go down through the carb and into the motor ..past the rings and straight into the bottem end of the motor. Run and re flush the oil afterwarming up O yea Welcome to the YOC Link to comment Share on other sites More sharing options...
Sir Puma Posted August 28, 2012 Author Share Posted August 28, 2012 Thanks for the welcome. I looked at the floats when I cleaned up the carb and they seemed ok. I can pull them back out though and toss them in a bowl of warm water. As I said, I'm not new to mechanicing but these motorbikes are different machines than the cars, trucks and aircraft that I'm used to. The next major investment will be new tires. The front one is in rough shape (warn and cracking.) Already got a finger shaking from a friend of mine who is a long time biker and wants to make sure I get new tires. Link to comment Share on other sites More sharing options...
Sacha Posted August 28, 2012 Share Posted August 28, 2012 aboard the YOC. As dt502001 mentioned this section is just for intros and it's a good idea to post your technical questions in the workshop. Better still you can start a project thread so we can follow along with your project. Link to comment Share on other sites More sharing options...
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