Red bike frame BMX don't know what it is I have a red bmx bike with flat plates on both sides in the front it has circles through them I don't know what kind of bike it is it's just the frame I bought from a friend he said he thought it was a diamond back but I never seen one of them made like this one can anyone help me out. Thanks
It looks a lot like a bike made by Giant branded in different ways for different markets.
There are several frames made with a circle cutout and a sort of X shaped gusset. The circle in the middle with a rolled edge is rare.
Here it is as a 1983/1984 Repco Team Hotfoot
It was made by Giant for Repco

bloggingadeadhorse.com
Here's an 82 Team Giant with a similar frame

Here is a 1981 Giant GMX-250 with a similar frame

bmxmuseum.com