Any advice on choice of bike after a break of 25 years (long break I know) full licence. Used to ride a BMW RS100. I am 58, 5 ' 8", 85 kg. Ex rugby league player with bad back and multi operated on knees. Just done a full day back to biking course on Suzuki GS550 where I was told off for riding too fast for my ability. I am sure the instructor was right. To use for daily commute of 16 miles each way plus weekend countryside riding. Bike has to be economical, fairly low to sit on and not too heavy. Useless with DIY so shaft drive might be useful? Thank you.Gary