Originally posted by Jason T.
What I couldn't understand was that in Maine (both directions) I had to hold the truck pretty much to the metal to keep 55 - 60. But once I got back into Mass and CT, I could drop back to maybe 1/2 throttle and hold 65 - 70 and at times had it up to 75 to pass some traffic on the down hills.
What I don't get is that I couldn't keep up my speed the further north I got. I thought cold air was supposed to help facilitate an efficient burn... Could it be that the colder air is denser and creating more drag on the truck?

Did you notice the same thing Jason? Any one else?
By the way, my current 2.25 is pretty stock other than the NRP exhaust, weber 34ICH with a brandy new K&N filter on an 8.1 head. Everything else is as it should be from Solihull. I'm also riding on 33" tires so my real speed was probably higher than the speedo was telling me. In case any one is wondering for comparison purposes.
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