Impeller selection/ engine mods for 96 speedster 718

[hess996]

I am going to have a friend of mine at a local shop order me 2 wiseco piston kits that are 83.5mm (WK1298) with the bearings (B1071). The shop will be doing all the head work, boring etc and also media blast every part inside and out of the top end, manifold, exhaust and water box and clean/tune-up the carbs for around $800. Great deal I think and I like to support local when I can. I have this 1996 seadoo speedster 717 in great condition every where else including the trailer. Last thing I have left (also the most expensive I'm sure) is the engines and drive system. Also the motor mounts seem to be in good shape but are still the original ones this boat came with. Would it be a good idea to just replace them all with new fresh ones since I'm doing all this work to the motors?
I'm going in tomorrow to order all the parts but I was wondering if there are any other mods I could do, since I have gone this far and all. The impellers have a few small dings in them so I want to replace them at the same time I do the motors. I just don't know what kind I should go with. I'm really wanting more top speed. So I'm just looking for any ideas on mods as it seems most places don't offer mods for jet boats.
The biggest thing I need is ideas for what impellers I should get with the motors going to 83.5mm and aiming for more of a top speed increase, since that is a for sure mod right now. Just didn't know if anyone knew of any other mods out there like.........
aftermarket -water box
-exhaust
-jet pump
-drive shaft
-also looking into changing out the gauges (preferably to digital)
etc...

Lots of questions I know. I have been all over the place trying to research info for this thing and cant seem to come up with much direction. So any kind of input would be greatly appreciated. Also wanted so say thank you in advance for the help on this and all the other questions I had on other posts. You guys and this site have been awesome with helping out!!


Thanks again, Hess
1996 Seadoo Speedster 717

 

[hess996]

--Update-- I decided to go with the SBT 1.5mm top-end kit (just a better price considering buying 2 kit) and ordered them yesterday. After talking to Dave at Impros about my setup on my speedster he decided the best impellers for my boat are the Skat-Trak Swirls 16/21. I will post pics of the build as stuff comes in and goes on. Before any motor or drive system work, I could only get this thing to top out at 41 mph on my gps. Cant wait to see what all the upgrades can bring it up too!