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This topic has some good historical info if you do a search. I don't know about the subjective term of "don't run it hard at all". My bike is stock as well. I turned 10,000 miles on her today (started using it first of June 06). I get my worse mpg when I doddle along approximately 2500-3500 rpm. It surprised me as I was just out cruising along on some nice back roads looking at the scenery and assumed I'd get record mpg for the ride, NOT. I have repeated that low mpg with same type of riding. I usually get 40-45 mpg with the rare 50-52 mpg. I ride almost all mountain two lane with very twisty fun roads. I find mine runs very strong 4000-4500 rpm and this gives me a wide range with minimal shifting (drop to mid 3k or up to red line) and this seems to be "in the groove" for this motor. Today I drove approximately 170 miles and averaged 43+ mpg. I have a Triumph shield and I weigh approximately 220 lbs. Tire pressure and how you accelerate also affects fuel use.
Try this. Gas bike to ring in tank. Go for a nice steady ride with little or no stop and go traffic, lights etc. After 60-100 miles stop and gas up to same level in tank. DO THE MATH, not when I flipped to reserve, too subjective. REPEAT the process again being as smooth and controlling the traffic variables as best you can. Fill to same level in tank and DO THE MATH. After a couple of base line runs see what mpg you are getting. Again make sure tires are properly inflated, chain is adjusted and lubed with tires properly aligned etc. Then try using different rpm range and compare. No offense, but this is not a HD and you may need to run it in a bit and and at a little "harder" rpm's and then with more miles she will also loosen up some. She won't break on you, these are bullet proof under tuned motors with a conservative rev limiter.
Cheers!
BobW :-D
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