Originally posted by noobatron
THanks for clearing that up guys, i get it now hehehe 
I also have another question regard exhuast port height. if you raise the exhaust port hieght on the sleeve, then you would have to raise it also on the crank case right? What happens when i replace the sleeve to a new one with the stock exhaust height. THat would meant that the exhuast port height on the crank case would be higher than that of the sleeve. Would that jeopardize the engine's longivity or reliabiliy or power? Would the sleeve start to warp or blow out at the top of the sleeve exhaust port because there's no reinforcement from the crank caes due to its exhaust port being higher than that of stock? Have i lost you guys yet?
I glad that we were able to help.
How much higher exhaust makes sence to raise? 0.1 mm is equal 2 degree. Even if you raise 10 degree exhaust it is only 0.5 mm-don't touch crnckcase, leave it as stock, nothing will change.