Most minor, single mouth ulcers are caused by damage to the mouth, for example by accidentally biting the inside of your cheek while eating, or from a sharp tooth, food or filling.
I have a 2005 Honda Element. The owners manual states the brake fluid should be replaced every 3 years. When I asked the dealer to replace the brake fluid, they said it was going to cost $190. I told them last time they did it, it was only $27.
How often should I change my oil? (New to bikes) Hey everybody, I have an '82 Hondamatic CM450A. I changed the oil last May when I got it and my grandpa told me that he only changes the oil on his Honda once a year. Well I'm nearing 2000mi since that oil change and I'm starting to get a bit paranoid. A friend of mine who rides an 80's Yamaha told me he changes his oil every 1000mi.