Really odd problem!

[dm_mg]

Really odd problem!
I have been riding motorcycles for quite a long time and recently downsized to the C650GT from a 1300cc sport-touring bike.
The scooter fits my current “mission” well and I really love it. This is my first scooter.
It took me some time to adjust to CVT, I still can’t say that I like it much … but we are on good terms now.
Here are my two engine/fuel related questions to the members of the group:

First: it takes a relatively long time to warm the engine up, even during summer. Since there is no temp gage, I have indirect signs to go by. One is being if I twist the throttle brisk, the engine does not pick up as fast as I want. If feels like I am flooding the engine (if the engine was carbureted) for a half a second and then RPM goes up.
Do any of you experience long warmup times (approximately 10-15 minutes) and the engine “flooding” issues?

Second (maybe it is somehow related to the first problem): the fuel management system can cut the fuel for a moment at any speed when I ride slowly (25-30 mph, or 40-50 kph) or on high speed deceleration. The problem goes away as soon as I open the throttle up a little.

Did any of you experience anything like this?
Is it “normal”?

Thanks for your time in advance!

 

[windplr]

You should be able to start up and go almost immediately. I generally give it one or two quick throttle twists, and am off. There is never any hesitation. 10 or 15 minutes to warm up is just not right. Rarely when backing off the throttle, and then back on, I may experience a moment of hesitation, but it is quickly back to normal. To me it sounds like there something wrong with your bike, possibly electronics or fuel system related. Just a guess.

 

[Snowdog]

Yes, I agree. There is something wrong with the fuel system, I suggest you take it to the dealer.

 

[laptopman84]

I just go by the sound of the bike. when you first turn the bike over it will rev a bit, then shortly after the engine sound with go down. you can't really rev the bike, due to the traction control on it. but you can slowly give to gas on center stand, just not quickly.

 

[tlippy]

I just go by the sound of the bike. when you first turn the bike over it will rev a bit, then shortly after the engine sound with go down. you can't really rev the bike, due to the traction control on it. but you can slowly give to gas on center stand, just not quickly.

Is this the reason I can't blip the throttle while on the center stand? When I do - the scoot stumbles and stutters. If I gently open the throttle it will rev up

 

[exavid]

I'd take the bike back to the dealer and have them flash the ECU. It might be that yours doesn't have the latest update on the engine control computer. I had a similar problem with my GT and that cured it. One other thing is that these engines really don't seem to like a steady diet of ethanol laced gasoline. I add a shot of Star Brite enzyme to every other tank on a fuel up. The bike is a lot happier with 93 octane sans ethanol that I fuel up with now and then. It does irritate me to pay fifty cents per gallon just to get unadulterated gas. Also there can be some 'on/off' action on the throttle at low speeds, around 20-25mph, after riding at higher speeds. It's especially noticeable on my GT when I come off a freeway and into a schools zone at 20mph. It doesn't last long and now that I've had a lot more practice I can minimize the effect with careful throttle handling.

After 60 years of riding bikes that needed shifting I'm enjoying the CVT. It took a bit of getting used to it especially when getting the maximum performance in the twisties but once I got used to it I like it. For one thing you never get caught in the wrong gear, no longer care just when the light goes green as I approach it. If I'm coming up to a red light and preparing to stop and the light goes green before I come to a stop, no need to make a quick shift. Likewise when starting out on a fairly steep grade with a passenger aboard there's no chance of stalling the engine. It does cut down the mileage a bit compared to a manual shift bike but it's worth it to me. I've beat a couple of HDs in traffic signal drags with my GT. I think it's mainly because you never have to let up to shift. I only wish they didn't have the timing hold back programmed into the ECU. I'd like to have full power from a standing start. If you start from a standing start with full throttle you can hear the point the ECU lets the timing advance all the way. My previous Silverwing and Suzuki B650 did the same thing. A wee bit of front wheel lift would be nice once in awhile. Maybe I'll grow out of that urge when I get old. Older than my current 74 that is.

 

[JaimeC]

Three years, 25,000 miles on mid-grade (89 Octane) gasohol here and never a problem beyond the usual "run it briefly before parking overnight/won't start in the morning" issue that almost everyone complains about, but BMW has yet to fix.