Unless you have really short legs I think you'll find the crash bars to be too close for comfortably resting your feet on the lower portion of them like highway pegs. You could probably clamp some pegs on the outside to get a better placement though, wider with "knees in the breeze". I sometimes throw my boots up on top of my CT125's Zeta crash bars, but even then they're too close to set the outsoles on without really bending my knees, so I rest the back of my legs on top of the bars at the "upper" of the boot instead.
The JA65 has a different engine with different cases and engine mount spacing, and a different "step" for the footpegs attached below it, so the geometry for attaching the crash bars is likely different on bottom. On top the design changed to be less parts and less of a PITA from the JA55. The JA55 has tube ends on top that are threaded inside and a bracket attaches to, while the JA65 has that bracket integrated (welded) to the tube. If the bottom attachment points did fit, which I don't suspect they would, you might be able to get the top to work using other JA55 parts that are missing from the stock JA65 since the design was simplified. Personally I bought the Moto Skill crash bars for my JA55 and decided against using them. Unlike the OEM bars and some of the
other aftermarket ones they don't have threaded attachment points for the skid plate bolts, just washers and lock nuts. That extra hardware looked like it would make it annoying to work on when they could have just used weld nuts if they had consistency in their production. Instead there are elongated holes that provide a range of tolerance for the placement being slightly off. The welds were also not great looking, though I've seen others that didn't look so bad where they may have improved their process since the ones I bought. Others on this forum seem very happy with the Moto Skill crash bars, so really just a matter of preference.
