At least 3' - more if there are dishwasher or oven doors opening into the walkway.
it should be the height where you can work easily on the kitchen island where you do not have to bend over to work there. It should be higher than the hand but shorter than the elbows.
Well should be 3000feet up
You should use backless bar stools for small kitchen
The exhaust valves should have .005 inches of clearance, and the intake valves should have .004 inches of clearance.
You need to study the circulation pattern of your kitchen to make that choice. Do you need or want people to circulate through the kitchen. A peninsula will limit the circulation through the kitchen. There is something nice about not having traffic in a kitchen when working. If your kitchen is big enough it may accommodate both.
refuse the clearance and request and amended clearance
On a Yamaha 1980 XS400 the valve clearance for the inlet valve should be 0.0003 inches. The valve clearance for the exhaust should be 0.006 inches.
Need to know how much clearance where.
On the 1994 Yamaha Breeze the valve clearance on the intake should be set at 0.006 inches. The valve clearance on the exhaust should be set at .011 inches.
Phase to phase clearance should be around 11.5 inches.
I believe the clearance should be within .002 and .007 thousands of an inch. and also the end play clearance, should be between .002 and .007. you should check the bearing caps with plastic gauge, and the end play wiyh a feeler gauge.
It should be large enough for all kitchen nessesities, storage and areas to hang out with friends.