Super Jet Superjet will not go past 5kms in water, help?

Pretty much, I have an 04 superjet, with aftermarket exhaust ride plate, grate, some basic mods. But I threw it in the water, and it will not go past about 3-5kms. I have checked the plugs, the cyclinders are testing 145 each hole, perfect psi.
Is there anything basic I could be missing? Or even if this happens?
Could it be off fuel?
Where I am at the moment, it is winter, and it's freezing. Could the cold weather be the blame?
I didn't warm it up, BUT I was running it for about 100 meters and then I fell off, as It was so hard to stay on going so slow. Brought it back, tried to warm it up, and it flooded on me, then the battery went dead.
I took it home, charged the battery, a few hours later when the battery was done, I started her up, and she idles beautifully, no wrong sounds. Rev's out fine.

Any help would be very appreciated as I am going to do some work on it tomorrow, try and see what I can come up with!
 

swapmeet

Brotastic
Location
Arlington TX
It's your ride plate!






No no... I'm kidding lol.








Assuming it ran correctly the last time you took it out....

Does it make a bogging sound when you try to open up the throttle?

First guess would be too much fuel, needle and seat could be sticking open.
Second guess is exhaust leak.

I don't think cold weather would have that much effect. Maybe others will chime in.
 
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