| Author | Message | ||
     Djm |
I have a new XT with about 650 miles, and I noticed that lately when I start her up and roll on the throttle in first gear, I get the occasional engine sputter, almost like the engine is about to stall (never does though). This usually goes away after a few blocks. And while I have great pull in first gear once I start moving, I feel like I have to give the bike extra gas and clutch play when I first start moving after stopping. ECM/TPS issue? | ||
| Hughlysses |
It sounds like TPS, but since you have auto TPS reset, it shouldn't be. You could try the manual "force TPS reset" procedure that's been posted here or at advrider. | ||
| Redwing |
I've got 675 on my XT and I've experienced a bit of a stumble, sounds like its taking a gulp of air on start up from a stop on three occasions but I still have an old bad habit of blipping the throttle just before I start to slip the clutch. (have to consciously think about just smoothly slipping the clutch and rolling the throttle) Got about 1/2 mile of residential streets before I get to 45mph. It"s not occurred after I get it warmed up. | ||
| Ulynut |
Same thing with my '06 Ulysses. I've just learned to ride it without "blipping" the throttle. Would love to find a fix for it. | ||
| Bobr |
I have stumbling on my XT, but it's very rare and I suspect it could be the gas. My experience with Harley and Buell motors is that their performance and fuel economy is greatly affected by the type of gas I use. They like high octane and dislike ethanol and cheap gas (not that there is such a thing anymore). I've also noticed my XT requires more throttle leaving from a stop than either my '03xb9sl or my wife's '07 xb12Ss. I don't think there is a TPS on the '08 engines. I also think the difference in the amount of throttle required is just part of the design of the new fueling system. Now that I'm used to it I like it. My wife's bike always felt kind of lurchy to me leaving from a stop. | ||
| Garyz28 |
I believe the 08's have a new throttle cam that makes the throttle a little slower off idle in order to make it less touchy. | ||
| Curly |
the stumbles and sputters will disappear with more miles. the fan will also stop running so much. this all comes together around 5000-6000 miles. so get out there and ride!  | ||
| Djm |
Thanks for the feedback. Hopefully the sputters will stop with more files as a few folks have mentioned. But more throttle is normal for the XT? Don't want to foul the plugs with too much blipping before engaging the clutch... (Message edited by djm on May 09, 2008) | ||
| Towjam |
When not fully warmed up, I definitely notice a stumble on my XT as I get underway in first gear. In fact, I almost dropped it this morning as I was pulling out of the driveway and making a sharp left turn into the alley. However, it only takes another minute or two and the stumble becomes a non-issue. All of my Harleys have had silky smooth fuel mapping and great low-speed throttle control. I don't understand why Buell can't seem to get this fully ironed out. It's not like the XB is a totally new engine built by Rotax. | ||
| Ratbuell |
DO NOT BLIP AN EFI BUELL. It's not a carb. You don't have to blip. It only pisses the bike off. Smooooth is the only way to go; your bike will thank you and you will thank me. Trust me. I found that on my Uly, removing just about all the slack from the throttle cables took out any urge to blip. A slight twist is enough to get the bike moving as I slip the clutch. I've also noted that on the '08s you need to let them warm up (in cold weather - sub-50 degrees or so) for at least 2 minutes before they stop sneezing at you coming off-idle. Fire up, *then* suit up, *then* close the garage, *then* head off. Get hamfisted with the bike, it's gonna fight back. Hit the throttle as soon as you're off the starter? It's gonna sneeze at ya. | ||
| Ulyranger |
FWIW I find the XT doesn't like blippin', at all. Blippin' the throttle causes stumbles on my bike, no blippin'= no stumbles. I have no stumbles or problems starting off if I just slip the clutch and slowly ease on the throttle. On the flats I don't even need any throttle it will just roll off no problem. Mine seems to know when I have it in gear with the clutch engaged, the idle goes up to about 2.1K vs. about 1.2k out of gear. Just got 'er back from 1K service tonight, oh soooo sweet. (but I've got another story for another post, so I don't hijack) | ||
| Dick_stilton |
Same thing with my '06 Ulysses. I've just learned to ride it without "blipping" the throttle. Would love to find a fix for it. Yeah me too.... Just dont blip anymore because of this and all is fine now. Except for that bloody noise up front... could it be the dreaded 'Horn' thang. | ||
| Jlnance |
Except for that bloody noise up front... could it be the dreaded 'Horn' thang. Probably is. Apparently is easy to fix. | ||
| Jlnance |
+1 for letting the bike warm up well. Mine (06) will cough when it's cold. | ||
| Djm |
So it looks like I will also need to learn to ride without blipping the throttle, and slipping the clutch and then giving gas (as opposed to my carbed sportbike days). Thanks everyone. Ulyranger - looking forward to your post 1k ride review...I am about to make my appointment soon with Ratbuell's dealership... (Message edited by djm on May 10, 2008) | ||
| Hughlysses |
I've noticed I have that habit too (blip throttle, slip clutch and then give gas). I'll very rarely get a "cough" when I do this. +1 for letting engine thoroughly warm up before expecting it to "behave". |
