Thanks so much for the advice guys, It sounds like I really need to go the extra mile and run these in parallel. The problem now is going to be with routing. I'm not sure if it matters which way it's done. I may have to draw a diagram, but here's how they're layed out: KTM: The cylinder pumps into a T right out of the cylinder, and feeds into the top of each radiator separately. This part I can accomplish with no problem. Then the coolant flows the the bottom of each and the pump pull from the bottom of the right rad only, but there's a connecting line linking the bottom of the left and right rads. THIS is where I have a problem. I have no idea how I'll get a connecting line across the bottom. I can post a pic, but I'd have to either run a line in front of the frame, and somehow make a strong steel shield for it, or I can directly pull from both rads, but I'd have to run a line behind the cylinder, which is a fairly long line. KXF: This one in stock form feeds to the top of the right rad, then has a connecting line going to each one at the top, and then the coolant falls and the pump pulls equally from the bottom of both rads. This basically presents me the same problem because I still need to run a line from the bottom of the left rad to the right side somehow. Is there any fundamental difference between the way these are plumbed? Can I feed equally into the top of both like the KTM and also have a connecting line at the top, and then pull separately from the bottom of both without a lower connecter? Can the spillover point at the top take care of things? If this is too rambling, let me know I'll diagram each method. With respect to the fan: your typical 80mm computer fans are pretty thick and only move about 20-45cfm, however, with a little searching I've found some nice 92x92x25mm fans that would cover half my rad perfectly, and pull 100+cfm. I've heard some other people run similar with great success, so I think I'll give it a try. The fans are about $9 each, whereas the KTM kits are like $90. Plus the KTM was an EXC model, so I was going to run the fan right off the headlight power, and put the switch on the bars, since my bike will have no headlight. Thanks so much for the advice guys, any other thoughts?