I see there are two .30 alu and one .10 copper shim in it, do i remove the copper shim after the breakin? I have heard some says using Cyrul breakin method work best on Novarossi base engine and alot of guys around here were using his method too with great success. I really dont know which is the best pipe for this engine by now i have nova 9886, rb 086, picco 7206 and ninja fls 2053. I will try the ninja for breakin this engine, what other pipe are recommended?