I have a 1200 sporty too, a Nightster. I've been two up three times across France and half of Spain loaded with camping gear and we're planning to do a complete tour of all of the peninsular next June. We averaged 45, but could easily have got 47 as theoneandonly says.
I could stretch the 13l tank to 125/130 miles if needed, but in reality, even with my adv bike, I'm getting off every hour/hour and a half to stretch legs and so coincide with a fuel stop.
HDRCGB is my vote, I'm a member and discount codes are readily available to them also. Generally I find that they aren't the 'mid life crisis' buyers of HD's but the seasoned biker brigade (I'm not suggesting that HOG members are).
I could stretch the 13l tank to 125/130 miles if needed, but in reality, even with my adv bike, I'm getting off every hour/hour and a half to stretch legs and so coincide with a fuel stop.
HDRCGB is my vote, I'm a member and discount codes are readily available to them also. Generally I find that they aren't the 'mid life crisis' buyers of HD's but the seasoned biker brigade (I'm not suggesting that HOG members are).