The DS has no cooling system problems if jetted rich enough. The DS can run hot if too lean. The DS makes noticably more power at full engine temperature so you really don't need to run it at 160 degrees. I used to replace the fan over and over when it died, then I just got rid of the fan altogether, but I run alcohol very rich since it's oxygenated, which cools the engine.

 

Its not so much that my engine is insanely hot, but i do want to keep it from gettin to hot, i have the EFI so my engine will be in tune, i run the engine ice and have the scoops, my fan kicks on just every once and a while, not a big deal, but when i run with the 4x4's we do a lot of slow rocky trail riding and im just in 1st gear clutchin it thro some nasty stuff and my engine gets hot, specially if i have one of my girls on the back with me, so i like the idea of the bigger radiator for those instances, plus mine is gettin a lil old and while i have my bike all apart id like to replace it, for a stock radiator price id rather go aftermarket, im not a hardcore dragger so the hair difference in power wont bother me, just want her to run good.

I wonder if i get this radiator i might just run regular coolant since engine ice might be overkill huh?

 

How much bigger is it then stock ?