I recently picked up a 2010 690 smc with 3k miles on it. It is the funnest bike I've ever owned and I've owned over 100 bikes in 35 years. Everyone talks about it being a wheelie machine and granted, it does lift the front end up coming out of every corner but when I go to really wheelie...
Koubalink ktm8-2 for 2008-up 690 Enduro
$110 plus $5 shipping.
was installed on my 690 when I bought it used with 50 miles on it.
reinstalled stock link at around 350 miles on odometer.
no signs of abuse or stress fracture.