Sports piston rings orientation and order

[Ian Williams]

David, I second Colin's question and add another, you say it was hard to start and that you have an HS2 fitted, what needle and spring are you using? I would suggest a 5 or 6 is a good starting point with blue spring, you will need to bed the engine in before reliably checking plug colour, new bores will let oil by confusing your readings. Certainly from your description that it will not rev I would suggest mixture and possibly timing are off.