Diamond heads is the only place to receive specialized machine work on cylinder heads and cylinder fins for motorcycles. Tyey brag about their 7to10 day turn around but do not stand behind it. I recently sent $2500.00 worth of cylinders and heads to them only to be lied to about when my parts would return. I even called ahead of time to check on work load as I was aprehensive from the start due to mixed reviews due to the same issues. I really like the end result and after being assured by the girl that answers the phone for them that they were in fact ahead of scedule, I shipped them my parts. After three weeks I called to see if my stuff was done and that same girl said it was due to ship that Friday or possibly Monday. After not hearing from them I called back the following Tuesday and the same girl said that my parts were done and going to ship that afternoon and that someone would call for payment information and shipping address confirmation. After not hearing from them again I called back Wednesday, the same girl tells me that everybody is at lunch she will find out what is going on and call me back in 30 mins. I called back three hours later to ask what was going on and said she never called back. She asked me to hold so she could get my total for me and I asked what the problem was, she replied I don't know and left it at that. After all of this I was sure I was being lied to,which I really don't appreciate and is very unproffessional. I am an auto mechanic by trade and have come to realize over the years that being truthfull with your customers is allways best. Everybody knows that stuff happens,don't start a lie because of it, just explain the problem. Most people will understand.I never once got out of line on the phone with them, as bad as I wanted to, mostly because I was worried that as unproffessional as they are I might never see my parts again. This is the first time I have ever written a negative review about anybody,I just hope it helps somone else in the same situation make the right decisions. read more