my 09 M90 stalled at 200k, problem was regulator which i learned was a recall item. the dealer came to my home, clipped in a new one and 40 mins later bike perfect. Ive also noticed popping at idle, now and again, an dealer says couldnt find a problem but to monitor it. it only seems to happen at idle. finally i had a TIN like sound bouincing around AT IDLE in the engine, mostly left side. comes and goes. ive read n threads that this may be loose shields or air cleaner whih i havnt located yet. but bike runs lovely and i love it . ive had 6 suzukis. cant beatem.