Ok my SV has the tendency to stall out after i have been riding for about 30mins it used to just crank right back up, but now I have to roll the throttle just a tad to get it to crank(which in my mind makes no sense cause of the FI), and after it cranks *if it stays running its fine but mostly it backfires and dies agian...???? Recently changed plugs and oil, it did good when I put the new plugs in for about 3 days then right back to the same thing...The bike itself has about 17000 mi on it an its an 04, I was wondering if I need a valve adjustment or????????????????????????? I have no clue ?