Grand Prix 500
Join Date: Jul 2008
Location: SE Pennsylvania
I shoot for 30 and wouldn't adjust unless it was more than 35. Too tight can do damage to chain, sprockets, gearbox. Too loose causes snatchy throttle. Insanely loose and the chain will come off.
Casual maintenance will result in at least 20k miles from modern chain and sprockets. As a comparison, my '90 Honda 650 Hawk with 40-50 hp needed chain and sprockets at about 9k. My '08 Speed Triple with more than double the hp and torque showed no signs of wear at 17k.
Edit: unless you live in the UK and ride in rain all summer and on salted roads all winter. Then you do have to pay attention to maintenance.
'61 Clubman's Gold Star, 2013 Daytona 675R (track bike), 2013 KTM 690 Duke, 2017 KTM SD GT, 2018 Street Triple RS.