An external pump would be better, not only from a cooling stand point, but we could change them out faster during races. The fuel regulators I have been looking at are adjustable and provide much better regulation adding only two extra hoses, one being the return. The downside is cost. Any idea what the cost is on the oem replacement?
Okay, then the cost is still cheaper. The pumps I have researched are billet, 100psi capable and easily regulated down to 40 psi.
I see in your video the pump is having a hard time and surging back and forth from 40 to 42psi. Was this the oem pump? I'm pretty sure the Keihin injectors require 43.5 psi (3 Bar) but can run as high as 50psi (3.5 Bar). I will have to take a look at the oem regulator to see if it can be shimmed to boost pressure.
Sure was the OEM pump. I am curious if shimming the regulator to reach 50psi, how that would impact the performance? I can say, my te511 pump upgrade provided my bike a consistent performance after everything heats up!
George Erl and some others have tried to come up with an external pump for the 610/630s and as far as I know don't think they were ever successful. Somewhere I have a picture of a rally bike though that appears to have one.
I found the commercial supplier for that HFP pump. I also found an external, inexpensive regulator adjustable 35-50psi.
