Oil light question 03 SM 450

[billy]

I took a look at a buddy's 03 SM 450 he has for sale. To give you guys a little background info: The bike has about 3300 miles and had a recent valve check. In addition, it had a top end rebuild at 9xx miles. The bike is in pristine condition but one of the things that concerned me was the the oil light coming on. The light would come on only after during idle when the bike was warm. When the bike was revved or running on the road the light would go out. Is this normal for that particular bike? Thanks in advance.