Question about Triumph Bonneville Motorcycles

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Need help with 66 triumph 650 bonneville

Having problem with oil being pumped out of automatic chain oiler tube . i have drained all fluids and i don't know how much or what kind of oil it needs . all my technical manuals were stolen and i haven't worked on it for 3 years .is there a bypass (checkball and spring) on the oil pump that feeds the chain oiler or did it simply have to much oil in the crankcase ? any help would be great,thanks

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After these bikes have set for a period of time the oil in the oil tank drains to the lower end of the engine and when started after sitting the oil is usually forced out of the vents for crankcase; which on many of these bikes is through the primary and possibly to the chain oiler etc. Usually after running for a few minutes the oil is back in the oil tank and over supply to the oiler stops! Could possibly soak the clutch plates if it filled primary case also. Be sure and check oil level in tank?! If you added oil before starting it will now be overfilled after starting. This is common problem and will mend it self usually. Does make a mess in the garage toooooooo! Jesse "Leroy" Graves

Posted on Dec 24, 2008

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Leroy is correct these machines are prone to a condition known as wet sumping after standing for extended periods however the same condition can result from the balls in the oil pump sticking this can occure if the interval between oil changes is to great or if contamination of the oil by dirt or water has happened.as for oil being pumped out of the chain oiler if you remove the oil tank cap you will find the chain oiler suply lin with a screw in it flow of oil to chain can be adjusted by turning this screw clockwise to decrese flow & counter clockwise to decrease hope this is of some help to you

Posted on Feb 18, 2010

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