Just a word to the wise!
If you remove the exhaust pipe be carefull with the exhaust donut - they chip very easy.
Dealer chiped two corners out of mine when they checked the carb jetting.
When you put the exhaust back on, mount the pipe to the y connector from the bottom up, not top down - it does make a difference and makes a difference which spring you put on first.
Doing a chop off is almost imposs. checking piston wash & plug reading, inless you take a ratchet,shocket, extension and put it in your pocket.