Time to rebuild my engine?!

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FOX4LIFE

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So, i have a problem. It seems as though the tube from my carb to my airbox came undone while riding the other day. Now im having issues, its smokes and pops like crazy. The top end has never been rebuilt, so i think its time. My question is, how hard is it to do? I do have some mechanical knowledge, but have never actually rebuilt anything. Any help on parts or just general know how would be greatly appreciated!
 
The top end is easy to rebuild, you wont have a problem doing it if you need to. That being said, what color smoke is it making and what are you doing to make it pop (ie. letting off the throttle, under full throttle, etc.). Im curious if you have a tear in your intake boot
 
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