Extreme ATV Enthusiast
Join Date: Aug 2015
Location: Central Florida
On these older Fuji engines a valve adjustment around every 100 hours is not a bad thing to do, I had the exact same issue on my 2013 400 with the hard starting issue. It was still under warranty and took it to the local dealer and they replaced the entire carburetor, then when the issue wasn't fixed they told me they were going to tear the engine down and that it needed new rings because the engine tested low compression. They then told me that warranty would not cover it because it was a "wear" item. I picked it up and took it to a different dealer 2 hours away and they did a valve adjustment on it for under $200 and the machine has never started easier or ran better (now been 120 hours of trouble free use). I really feel that your issue is in the valves, not the carb. ps the 400 had about 70 hours on it when it needed the valve adjustment.
2013 Sportsman 500HO (bright white)
-HMF Swamp Series XL
-26" Maxxis Zillas on 12" STI HD6 machine wheels
2013 Sportsman 400HO (blue fire)
-26" AMS Swamp Fox Plus'
2014 Ranger Crew 570 LE EPS
-27" Maxxis Zillas on black 12" ITP SS 212 wheels