EC200 wont start

[Skele]

Just had a complete rebuild, top to bottom, all worn parts replaced.

Bike started 2nd kick and ran absolutely perfectly for ten minutes, then suddenly cut out while riding down a road in fourth gear, as if it ran out of fuel.

Here are the things i've checked/done so far:

-Checked for spark, its a bright blue fat one (even changed the plug as a precaution)
- Checked all ignition cables
- Cleaned carby (jets and all) and checked for blockages in fuel line
- Drained all old fuel (was four months old...) from fuel tank and replaced with new fuel
- has a brand new air filter, freshly oiled
- checked reed valves
- disconnected kill switch (has a brand new one) and kicked it over, no luck.
- plenty of compression (haven't checked with a gauge but you can feel it when you try to kick it...)

Feels like i've checked everything! It just wont start...