Umair thank you very much for giving me such valueable information. It takes years to gain these information.
I just want to know about two things
1) valve and valve guide
2) crankcase and head
Is there any specific brand of valves and we hand over the head to mechanic and he install valve guide by his choice. I think valve guide is the most critical part in valve operation.
A cheap valve guide will become faulty due to friction and heat and thus leak oil.
What is the price of crankcase and crankcase head?