CAN ANYONE GIVE ADVICE ON CHECKING THE OIL ON A SRX600, I HAVE HAD THIS BIKE FOR 7 YEARS NOW AND ON OCCASION IT SEEMS TO GO FROM BEING SPOT ON TO NEAR ON EMPTY IN A MATTER OF MINS , OR THE OTHER EXTREEM WHEN CHANGING THE OIL I HAVE FILLED IT TO THE MAX MARK, BUT THEN WHEN RUNNING IT FOUND IT TO BE OVERFLOWING WHEN CHECKING THE LEVEL A FEW MINUTES LATER?