So I got my TXT 250 with an overheating problem, this was narrowed down to a shot head O ring.
So I've replaced the O rings, and got a new head. But now when I start the bike it'll only start from cold with full choke, and the revs will shoot to maximum, I can knock the choke off and keep it running with tiny throttle inputs.
But if I rev the bike at all, the revs shoot right up and take AGES to settle back down. And the bike won't idle.
I've had the carb apart, all jets clean, and the choke plunger moves freely.
I did a compression test, 130psi
I sprayed WD40 along the inlet track to try and highlight any air leaks, but none found.
Anyone got any ideas of what to check?
Gaz