Took my m8000 out to the mountains this past week and the first day we rode it ran great. The 2nd day it wouldn't start so put it in a heated area and put some isopropyl in the tank and then it ran in the afternoon. On the third day it would not start. After a disappointing trip have had it in my shop for a day and replaced the plugs (spark is good), drained out the fuel, and check to make sure the fuel pump was working which it is. Still won't fire. Has about 500 miles on it and a month out warranty. Any ideas on what the issue might be?