Originally Posted by Werks

No the idle gap is not set from the factory on any LM engine. Scott is basically quoting the tuning method that I came up with for our engines a couple of years ago which you can find more details about on any of our threads. Be aware though that anytime you lean your HS needle as he is indicating your LS needle is going to lean out also (as fuel flows through your HS needle first and then through your LS needle). So when you lean your HS your idle speed will increase and you have to compensate for that by richening your LS if you use my fixed 0.5mm air gap system

Also to save you some trouble down the road, rule of thumb is never blindly trust that how the needle settings came on your engine from the factory are correct for break in no matter what brand you are using. It's your engine in your car with your unique set up and you need to adjust your engine for that. It is never a good idea to just leave them like they came and not touch them until you are 80% of the way through the break in process. If you need some help with detailed break in instructions take a look at the first post on any of my threads. This system will work with any engine from any brand