what kind of FMF pipe do you have?

You might add a pony or two with a good pipe. As for top speed, that depends on if you were maxing out before the pipe or not. If not, then you could gain a few mph, if you were topping out before the pipe you won't gain any speed, but you'll get there quicker.

 

That much lighter? Not really, at least for the Fourtrax the first year they came out. The guy I was racing happens to be one of my best friends, and I've lifted that heavy ba$tard into the back of his truck many times. That thing is just as heavy or heavier than my warrior. You can't change the past, and I did take him several times on the beach of lake superior. He recently rebuilt the engine to a 408 with high comp and cam so he can take me now, but never before. When it comes to tight trails I still keep even with him, but not on straight line drags. The carb alone will add 4hp if your not on crack and tune it right. If you only got a pony or two you should can that powercoreIV exhaust, thats a little short.

 

fmf power core 4. is that good?

 

stock the warrior is 25lb's heavier than a 400ex stock. I don't think you realise that the warrior is no where near the 400ex performance wise, you will have to put alot of mods in it to make it better. kind of like yours with aftermarket suspension and a-arms. As for the original question, i think your best sticking with the fmf pipe you have now.

 

Go with this http://www.hmfengineering.com/yamwarwolf.html Great pipe and sounds good to boot!

 

When we raced it was with only the carb, pipe, and filter kit on there. It was about a year ago. Now he will take me on a drag from all the engine work he did, but thats only on straight drags. On trails it's another story.