The guy putting the 787 in the X2 is me, it's a big bag of snakes but when I am done it will be very fast and damn near bulletproff, 787's are very stout 110 HP engines stock and they take mods REALLY well. I also had a 720 in an X2, also very fast but the engine bed plate hits the bottom of the ski and it is very hard to fit, as stated the exhaust points rearward so I buried a PJS resonator in the footwell and went straight out the back, even after tapping the pump for another cooling line and running it straight to the exhaust exit it was very loud, not the way to go if you want to stay friends at the lake..
The 787 required a hollow tubbie to be installed on the left side for clearance of the exhaust, the stock engine mounts were replaced with Superjet mounts then the rear engine mounting plate was flipped180 degrees and cut and bent to fit the angle of the Superjet engine mounts, the front onLy has one mount so an aluminum plate was glassed into the bottom of the hull and an Artic Cat mount is bolted to it, I glassed in a Seadoo pump tunnel so I was able to use my Seadoo alignment tool to set the engine in the proper place using an old RFI engine with a splined coupler , it went in with only a couple of shims., the exhaust exits out the right side in the rear, but it makes a 90 degree at the pipe exit and goes to two resonators mounted inside the ski behind the engine, then that makes another 90 degree turn into another resonator under the floor, it should be reasonably quiet.
A 300SX tank was used on this because it is the only tank that will almost fit , but to make that fit the floor the tank sits on had to be completely cut out, it didn't matter on this ski because the entire bottom has been reshaped with two part foam which allowed the floor to be moved down to accommodate the tank fairly easily. To build some strength back I used carbon fiber for the new floor.
Most here don't understand power, bottom end is not really a factor, the only thing that matters is how fast you can get an engine into it's usable powerband, to that end I am running a lightened flywheel, custom made PTO flywheel and total loss, 787's spin up fairly quickly already this one should do so much faster , also running a VE racing head and an R&D pipe , the R&D is more geared toward bottom end and midrange than top end power.
The build is taking a long , long time because I can only endure so much of this madness at any given time. My advice drop a 760 Yami in the 300SX graft in a pump tunnel from a Yamaha and go ride because a build like this is not only frustrating its pure madness. Lots of thinking goes into a build like this and so far everything is easily accessible and easily removed, starter, carbs , exhaust pipe , jet pump etc come off in minutes trust me I know I have had them off enough times.
