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To take advantage of the increased HP you'll have to enlarge the intake, a new prop with more pitch to push more water. You may have to go with after-market exit nozzle. A couple thou $$ and you may get 3-4 mph more!
 

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I agree with Spark-DY. Im running the E85 tune which is supposedly 120HP(ya right) and I have exactly the same top speed as my wifes bone stock 90hp. The only thing I like about the vtech maps is the acceleration from a dead stop is better. If you are looking for a muscle PWC which will pull 70mph you purchased the wrong machine . Yes you can flush a couple grand down the mod toilet and get into the mid fifties but what is the point? Use the spark for what its made for and spend the mod money on an extra vacation or something you will see some benefit from.
 
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