Hey Stumpy, I would be checking the basics 1st like fuel pressure and spark 1st. If they are OK maybe look at a dodgy fuel pump relay or loose...
Great looking bike, I like it!!! Something different and unique!!!
With engine at operating temp, it should be at the upper level. Obviously when the engine cools it will drop. Also make sure you let it settle...
What are those NT650's like anyway?
Separate names with a comma.