| Author | Message | ||
     Sanchez |
Sometimes when I blip the throttle for a downshift, my engine cuts out for a moment before catching again. Oddly enough, I have the same problem on my carburetted tube frame Buell, though presumably for entirely different reasons. Is this normal? | ||
| Brotherbuell |
Have you recently reset the TPS? | ||
| Ft_bstrd |
Sanchez, I believe the problem is you. You blip funny!  | ||
| Etennuly |
Ft, That's not nice......he might be "Sum' Blip" you  don't understand. But really....if you're serious about it, you don't "blip" a throttle.....you "whack" it!  TPS reset might be in order. | ||
| Fubar |
Blipping is silly and potentially damaging. Think about it for a second. You got this big ol' fly wheel and you wanna get that going and stopping quick? Think of the mechanical stress. Just quit it! | ||
| Ft_bstrd |
I'm sure that I am not riding right, but I haven't found a reason to. Maybe that's why my tires don't last long. I don't stay in any one gear long enough to blip. My wife says I have the same problem! | ||
| Sanchez |
> Have you recently reset the TPS? I just got my 5k service done, which I believe includes a TPS reset. I'm thinking back, and I can't recall whether or not it's coughed since then. > Blipping is silly and potentially damaging. I hope you're kidding. The engine has to match revs with the transmission one way or another. If you don't rev the engine before engaging the clutch, that shock comes from the drivetrain. I'd wager there's far less stress on the bike from blipping the throttle. Downshifting without matching revs is also potentially dangerous. You can probably get away with it on a Uly because the flywheel is relatively heavy. The revs don't drop too far between shifts, and there isn't much engine braking. On a bike with more engine braking (e.g. my m2), down shifting without matching revs is a great way to skid the back tire. | ||
| Sanchez |
> I believe the problem is you. You blip funny! Haha, well with 2 completely different bikes doing it, the only common thread is me! Please be sensitive to my problem, though. The politically correct term is "blip challenged."  | ||
| Ft_bstrd |
It would seem that blipping helps take some stress off in one way but may introduce it in another way. You are probably better at it than me, but "matching" engine speed with transmission speed on Buells means opening the throttle quite a bit quickly to get a fast response due to the heavier flywheel. Otherwise, the shift takes forever. Again, I am probably not as good as you or am doing it wrong, but I end up with the engine at or higher than the drivetrain speed which means that the bike surges a bit if I drop the clutch quickly putting stresses on the drive train the other direction. I guess my style is to use the friction zone of the clutch to mate the engine and transmission speeds. I'm not dropping the clutch but rather easing into the "synchronization" by easing out on it. Therefore, any stress is placed upon the clutch plates rather than the engine or drivetrain. Although not cheap, clutches are probably the cheapest part of the whole engine/transmission assy. There is nearly NO engine breaking from my Uly. I want what little engine is available as soon as possible. I rode a buddy of mine's DL1000 (see profile pic). With the detuned TL engine, I nearly threw myself over the handlebars the first few times I down shifted. As I said before, I'm probably doing something wrong. Again, could this be contributing to excessive tire wear? I'm not getting ANY rear wheel hop. I don't know. Just taking the opportunity to glean a little knowledge regarding downshifting. Thanks. | ||
| Treadmarks |
I blip the throttle while downshifting in traffic. It helps match the rpms before the downshift, and I like the extra boom of the spec ops pipe to let the cagers know that I am danger close. When I bought the bike, the dealer told me not to blip it, because it would foul the plugs. I also have a harley big twin (EFI) and it never liked to be blipped with the factory fuel maps. After installing a blower and a richer fuel controller it blips just fine. After about 500 miles were on the Uly, it started coughing or sneezing on about half of the blip attempts, as well as occasional sneezing in the parking lots (low speed) when the motor was cool. At 1000 miles I switched to iridium plugs, repaired a damaged front plug wire, switched to an 07 airbox housing, spec ops pipe, race ECM and amsoil. The coughing and sneezing was now gone. However-it did return at 3000 miles. I then went to an American Sport Bike's open air kit, with pvc relocation and replaced the factory plug wires with a set of magnacors. I now have over 5000 miles and the bike has never ran better. Low speed maneuvers in parking lots are now very predictable and fun actually. It starts better, idles solid at 900 rpm, gets over 50 mpg, and has a blip that makes the fat bikes jealous. I believe the big hitters for me were: 1-Good plugs and wires. (Run the wires to the right of the wiring harness under the airbox to prevent abrasion.) 2-PVC vent relocation out of the airbox. 3-A good TPS reset. Make sure that your throttle cable is very loose to allow the throttle body to snap fully closed. 4-07 airbox or open air conversion to get more fresh cool air to the fuel system. Happy blipping!  | ||
| Brotherbuell |
Sanchez, If you had the 5K service done recently and the TPS was reset, you may need to make a run at a steady 3000 RPM for 15 minutes to give the ECM its re-learn time. I had a similar problem when applying a handful of throttle after a service visit/TPS reset and that fixed it. | ||
| Etennuly |
When driving a truck if you don't blip you don't down shift, and for the most part you can't up shift either. Gears is gears. Bike is just smaller and more easily subjected to forced shifts(the ones that don't feel smooth). I blip if down shifting from speed to stopping, but not to drop a gear for accelerating. To blip or not to blip? ..... that is the question ...... I like to whack ...... it is more fun ...... that's what lifts the front wheel ...... a good throttle whackin' !!! Blip, shift, blip, shift, blip, shift..... Whack, shift, whack, shift, whack, shift ...... ya gotta' admit that's more fun!  | ||
| Chadhargis |
I like whacking too. Oh wait, you guys are talking about bikes? Oops. | ||
| Fubar |
I am *not* joking. I personally prefer a smoooth style of riding (although I have been know to "whack it" upon occasion). I use a combination of smooth throttle and clutch to down-shift. Not a track guy so YMMV. | ||
| Ft_bstrd |
I like whacking too. Is THAT what this is?  | ||
| Etennuly |
No, No, No, I believe that is Thwacking( if it involves minor collisions). Whacking involves the right wrist motion on the throttle grip, and whackin'......well that just ain't right at all!! | ||
| Freyke |
Stop the thwacking! That chick looks like she's gonna leave something on your knee... (Message edited by freyke on December 18, 2006) | ||
| Roadrailer |
Sanchez, I was having the same problem with an occasional hesitation when the weather turned cold. No problems yesterday in 70 deg weather. Maybe the ECM has to adapt to the change in temp????? | ||
| Adrian_8 |
This is a trait of Harley type v-twins...if they are running perfect they will still do it sometimes if you are a quick blipper. It just goes with the character of the bike. If your spark plug wires are worn and it is getting moisture you can get the bucking and jumping and all kinds of misbehavior. If the bike is running good after warm up...just ride and enjoy...A V-twin like my Aprilia just revs quicker and doesn't do it, I think the Buell motor cannot take the gas quick enuff. Like Conway Twitty said..."You Need a "Man with a Slow Hand" | ||
| Xbimmer |
I don't know what you guys are talking about. But Ft.bstrd's pics always crack me up. I like this thread. Coming from decades of riding big-flywheeled dry-clutched shaft-driven BMWs, my Uly feels like a shifting "snicker" in comparison. I agree with Ft_b, the clutch lever is the dampener for smoother shifting. | ||
| Adrian_8 |
Everyone ULY owner needs to ride a BMW R1200GS/ RT boxer every now and then. | ||
| Red_chili |
The memory of the CLUNK still haunts my nights...   | ||
| Johntman |
as for your carbed buell there is an accelerator pump. when you have it completely closed and then blip the throttle you are flooding the engine and getting the sputter/ misfire. As for the xb it's fuel injected and i know mine doesn't miss when i blip the throttle. I came from a M2 to an XB and always blip. I just dealt with sometimes if the blip was to much on the M2 it would miss. |
