Yes you can, Same line length, but the bar is 3 inches wider, kite with your hands close together and you wont feel much if any difference. 09 Fuel 23m lines 17" Bar, RPM 23m lines 20" bar. Enjoy.......

The lenten Probar comes with 20m lines and makes the kite quite twitchy, I got spanked a lot. My09 7m fuel,I got neil from hold the lines to cut to 21.5m, as Im not as good as Ruben and am not 70kgs wet, it was a happy medium. 3 inches or 3m changes the diameter of the arc and the wind window. 2009 fuels are fast enough and are an advanced kite, stuff up and they hammer you on 20m lines. 23m is a lot softer, keep your hands close together and its sweet.

So what about his 10m RPM, it will be a dog?????, yes you can use both bars for your 10m and 7m, to answer your question. If the guy/gall asking the question, he/she was probably sold/aquired a kite that is a little too advanced for thier skill level. Just be subtle. Stamp, not meaning to cut you down mate, like it is with the lines.

the current fuels run 17 inch bars with 20m lines on the 7 and 9 and 20 inch 23m lines on the 11
its a really good combo and seems to match the kites perfect

I cut my 10m RPM bar down to 14inchs to fly on the 7m fuel.

Fine if your sticking to flat water, just dont take the small bar + 10m into the surf unless you like getting frustrated.