Single fire Ignition?
HDF Community Team
Joined: Dec 2005
Posts: 5,366
Likes: 2,558
From: NC USA
Your 38 mpg could be from a number of things. Running around the city or suburbia, gunning it from stoplight to stoplight. Sitting at idle and constantly 'blipping' the throttle. It doesn't take a lot to lose a couple mpg.
The CV carb got a really bad rap back then, mostly due to the EPA restrictions. The MoCo had the jetting set very lean, so the first thing everyone did was remove the plug and adjust the mixture screw.
Homework: Top off the tank, take the bike out on the interstate and run at a constant speed for 50-100 miles. Top off the tank, and do the math.
Running lean will take away from mileage as quickly as running rich. It's always good to have a "low" mpg figure in mind when riding so far as when to fuel, but for checking mileage it's best to have the bike warmed up - as in, having been ridden for at least 10 minutes. (cold starts take a lot away from fuel mileage) Then fuel and go riding at least 100 miles with no more than one brief stop. And if possible, re-fuel at the same pump and count tenths on the speedo and hundrenths on the pump when doing the math. This is best way to check, whether at interstate speeds or on a lazy, slow road. I usually do each, to get a low and high figure.
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Tltrump
Exhaust System Topics
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Mar 30, 2008 08:52 AM
