Which battery for the Kay 400

[superfly]

I will try that too Pete, the plug are new.

I think it all down to the choke really because she started on the button in my garage this morning, and then if I don't rev it myself she stall.
I try to but a bit of choke but she stall, so maybe one of my repair on the little brass pipe is not good and add air instead of petrol.

That also good be a runner.
I will have a look over those thing tomorrow.