Re: New Project
Cool project. Yeah that splined shaft might be a problem. Talk to MSRfan he's the master builder of 5hp flathead bikes. A pz19 carb is going to be too small for the 5hp. In fact I'm putting a pz19 on my 3.5hp Briggs. You will probably have to make your own intake. There is a guy on here that uses a 28mm carb on his 5hp raptor, I think a 22mm carb would be a good size for a mild 5hp build and you could always upgrade later if you do any more to it.
I don't always listen to Alice in Chains..... but when I do, SO DO THE NEIGHBORS