Decided to upgrade my Orion Apollo 250 with a Honda XR250R engine

[Landsvw]

I’m liking that! When I did my Honda engine into a Suzuki frame I found I messed up on the front to rear sprocket alignment. Not the front to back, or side to side but the vertical. It messed with chain tensioning. When the rear suspension compressed, it put too much tension on the chain. And, on rebound, it made the chain super loose. It has something to do with centerline of both sprockets and the swingarm bolt. Just something to keep in mind as you proceed...