We’ve had several ScooterFile readers refer us to a story on webBikeWorld regarding some owners encountering a stalling issue on their BMW C 600 Sport and C 650 GT maxi-scooters. The issue appears to pertain to low-throttle or idle situations such as stoplights and slow-speed maneuvers. While I’ve had more than one non-BMW scooter occasionally stall on me idling at a stop light, what these owners are reporting appears to be something much more chronic. What’s particularly alarming is reports of the C-series bikes stalling during slow-speed turns, which for some, led to them being unable to right the bike without dropping it. Unfortunately many of these incidents have also ended in getting the bike towed.
The cause of the issue seems to still be a bit of a mystery. Some blame a throttle position sensor, while others are reporting an inaccurate fuel gauge readout and/or warning light relay that’s actually causing them to run out of fuel unexpectedly. At first read, some of these reports reminded me of Piaggio/Vespa’s notorious issues with their evaporated fuel recovery systems. In fact, one reader reports that this was their dealer’s official diagnosis. There appears to be an improperly-routed hose to the fuel catch canister that’s being pinched in the bike’s fairing.
Several fixes are mentioned by webBikeWorld readers. One involves following the specific instructions from the owners manual that state to always fuel the scooter on the center stand. Several owners report not having the stalling issue repeat itself when following the center stand gas up procedure as described in the manual. This definitely lends credence to the evaporated fuel recovery system not functioning properly.
A second fix appears to be an actual tech bulletin from BMW involving a software update and reset of the bike’s onboard engine management computer. Some readers appear to be having success with this fix as well.
Other owners are reporting that by simply disconnecting their battery for a while (which essentially resets the engine management computer), they’ve gotten more accurate fuel readouts and had fewer issues.
Whatever the cause, BMW will only be able to address it the more people report that there’s a problem. So definitely reach out to your dealer about the issue you’re having.
ScooterFile Tip: When working with your dealer, be a great customer. Be firm and insistent that you get straight answers, but stay civil. Your dealer wants to help you. Getting hot and bothered about the situation will not actually help resolve it. Remember, calm persistence is more effective than anger.
I also think it’s interesting that a lot of owners leaving comments over at webBikeWorld are describing their frustration with the stalling issue on one hand, while saying how much they love to ride their BMW on the other. Hopefully this is something that BMW gets completely figured out and disseminated to its dealer network soon. In the meantime, are YOU having issues with your BMW C-series scooter? Let us know in the comments.