03-10-2009, 05:33 PM #1
Ride plate, shoe, grate. Need a quick lesson
I just picked up jeffsntx's gprxt this weekend and am needing a quick lesson in rideplate, shoe and grate setups on the gpr hull. The ride plate is approx .150 above the shoe in the middle of the plate. I have been searching for over an hour but cant find a simple explanation of what I need to check and or fix. Also are these the stock trim tabs and is it worth changing to an aftermarket one? Thanks Brett
03-10-2009, 05:44 PM #2
I think the stock plastic ones are junk IMO. You can get a set of metal ones from a older GPR. I actually went with R&D groved Tabs and have a set of stock metal tabs if you need them. Let me know after you get more opinions.
Jims FF plate is awesome and IMO stick with a new 1200-1300Riva grate.
I wouldn't buy a used Grate.
The angle thing i don't understand yet, but am in class with WFO.
03-10-2009, 05:51 PM #3
A step in the middle is fine as long as the sides are flush or just below. As for the taps the stock are fine.(unless they are the plastic ones) Its is all about testing and finding the the shim dimension that works best for your hull. Also rideplate angle plays a big part of speed most are angled at .900 to 1.125 depending on set-up. this is the angle of the plate measured from the flat of the hull in the center to the rideplate. There is no magic number on set-up all hulls and riding conditions are different. Test change,Test change till you find the sweet spot..
03-11-2009, 12:00 PM #4
Brett, it is DEFINATELY woth putting some aftermarket tabs on the ski. There is nothing wrong with the stock plastic ones UNTIL you start shimming them down (then they start flexing). Those tabs are against the hull. The aftermarket tabs are a little thicker.
03-11-2009, 01:06 PM #5
03-11-2009, 02:37 PM #6
Brett, shimming the tabs down is going to add "stability" to the ski by pushing the nose down. EVERY person and EVERY ski is a little different. You need to spend some time on the water that you are going to ride in and see how it feels to YOU. If the ski is "bouncing" more than you would like, you can shim the plate down in the back or putting aftermarket tabs on it and trying that. It is ALL a balancing act for you and your riding style. Everyone has their own opinion on what tabs are best so its all up to you wether you go with the grooved Riva, flat R&D, or the metal stockers.
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