I bought my '07 WR450 at then end of September of last year and got the bike barely broken in with only a week of riding on it. Since then its sat in the garage for the winter. The electric start works but takes longer than I would expect it to. And for some reason it takes forever to kick start. Atleast 20-30 kicks. Is this normal? Even with the choke engaged? Could it be the spark plug on a brand new bike? The bike is completely stock (I'm trying to learn to ride in its slower, corked form). I dont know if this means anything, but after I finally get it started and I shut off the bike it lets out a small *puf* or backfire in the exhaust.