Originally Posted by Quantis
First valve check on a WR250R is over 40000Km. Yup that's right. Oil changes are every 5000Km
The engines are bulletproof. People regularly run 89 octane fuel despite the manual calling for 91 octane with no issues.
Click on the following link to the ADVrider WR250R/X Spec page. Lots of info.
5000km oil changes assume some amount of dirt riding, the WR250X (street version) has 10,000km intervals for oil changes. So if you're on the highway you don't have to change at 5000km unless it's for warranty or something...