changed oil last weekend started bike oil light went out came up to 60 psi and shut it down . didnt think any thing of the high psi. rode bike to work the next day about 20 miles and the oil psi was still at 60 psi. when i let it idle down it still read 60. i tapped the gauge the neddle dropped to 30.when i rode it home the gauge read 32. could it be a bad gauge or somethig else ?