These fit the stock 1" diameter bars.  These raise the stock handlebars up 3/4" and move them back 1.25".  If you want to run the stock bars, this makes the seating postition MUCH better for you, as your back further and more upright.  This may be the single best thing you can do to make riding and comfort nicer.  You do not need to lengthen cables 

Handlebar riser for STOCK KTM 390 Adventure bars

$39.95Price