I bought an 07 big bear a while back and was wanting to put some more in it to get some more out of it... I was curious to see what others had done to take on this task...

I was thinking on pipe jet kit bla bla bla but the thing is i couldn't find any, am i just not looking in the right places or what...

let me know on some ideas and suggestions, maybe gutting the stock pipe would be a cheap way to do things...

 

get on ebay they have everything u need

 

The problem with the 350 and 400 Big Bears was not power but its dire need for a 6th gear. The Big Bears will easily sceam there top 5th gear so a HP mod will not do much for it.

If you do go ahead and mod it ,remember the 400 (386cc) is the same 348cc motor found it the Warriors,Raptors,Wolverine and 350 Big Bears but with a 7mm longer stroke, so mods for those ATVs should work as well.