You will not ba happy at all with the performance by putting a bigger rig on the 14. It will be very tippy and you will spend a lot of time, money and effort getting it to even fit.

If you really want to enhance performance, and you typically sail in light winds, add a headsail to the boat. A Hooter is a GREAT light wind sail--with that, you can sail circles around a Hobie 16. In heavy wind, it is a lot of fun, but scary on a boat with limited floatation. Check out the set-up here:

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