Hi when I take the engine from idle very gently it splutters like mad, push it a little more it clears and edge out fine.

I have cleaned carb, changed plug, a ngk bpr5es. Also I have played with idle and mixture screw. Filter is clean and exhaust repacked.

Any ideas on base settings, needle positions or indeed ste jet sizes?

Thanks in advance.

Alan.

Pilot circuit sounds blocked.

Thanks, which is the pilot circuit?

If fiddling with the carb does not work check the base gasket.

Thanks, which is the pilot circuit?

It's the small jet next to the main jet.

Best cleaned with carb cleaner and compressed air.

If you must stick something in it, make sure it's neither pointier nor harder than a Polish sausage.

Thanks for your advice. I'll strip the carve and give it a go.