this is very helpful indeed michael, thanks...

one thing ( you gaped to 20 ) what do you mean by this? but yes thanks, I have been tuning the engine wrong also...
Ive been reading up on it, but what you described sounds good... It sounds like my engine is 4stroking, so I need
to set the LSN much leaner by sounds... also I need to take a look at the clunk in the tank if it flexes to all corners,
because of dead stick whilst invert...