Ever since this vehicle was purchased and then after the first oil change the motor developed a knock. The fueling is erratic at times meaning it hiccups or surges and has stalled while in motion. I brought this up to the dealer and to suzuki in november of 2015. I also found on a suzuki forum dedicated to this particular model that others were experiencing the same issues. I took the bike to the dealer and nothing was remedied. I spoke with suzuki corporate and they acknowledged that some models were experiencing...
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a knock due to an intolerance but that it wouldn't affect reliability. When asked to put it in writing they actually said yes but then never followed through and wouldn't return any further calls from me. I found out in europe suzuki was replacing the ecu on all bikes that were experiencing this. They have done nothing to fix this vehicle. I got to a point where I hired a lawyer to try to get the dealer to replace bike and their response was suzuki says there is nothing wrong. Now because of that I have been blacklisted from other dealers and they won't work on unit. I have lots of correspondence over the last 14 months trying to get this righted and now I am left to try to fix this myself. There are a plethora of others experiencing these same issues and getting the same response from suzuki, which is to not do anything to help. Www.Stromtrooper.Com is full of folks talking about this ecu issue and the knocking issue. When suzuki did have the bike and said they did an upgrade fix the bike was worse. They have also deleted the ecu replacement part twice since 2014. It has only stalled on me three times in 15 months but it only takes once at the wrong time and someone might be injured or worse. I am going to try to fix this on my own but I shouldn't have to. I think they have the bike set too lean to meet us requirements and it is a safety issue.