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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through September 01, 2009 » Throttle question for the vets « Previous Next »

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Jpowell490
Posted on Wednesday, August 26, 2009 - 02:26 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Sorry if this has been asked before, but I have a question since I am pretty new to Buell's.

I let my 1125 warm up yesterday and took to the top of the street, just coasting back down I blipped the throttle ever so slightly from idle to about 2500 and left off immediately. Engine killed over flat but not before backfiring from what sounded like the airbox.

Being new to the v-twin sportbike category, I am wondering if they just don't like that or if there is something I did wrong. If not, any causes, issues, or concerns? I could have swore it started sounding a bit "rougher" after that happened.

You guys are a great source of info and I am always willing to learn something I do not know and I don't claim to know the little Buell
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D_adams
Posted on Wednesday, August 26, 2009 - 02:35 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Backfiring through the intake does happen occasionally and will sometimes kill the bike. It's not normal in the sense that backfiring is ok, but it's something that will happen without any significant damage. If it does it a lot, there may be other issues. I've had it happen several times in the last year or so, but it's nothing I'm concerned about.
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Jpowell490
Posted on Wednesday, August 26, 2009 - 02:45 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Do you notice that it happens more when you first start out on the bike as opposed to when it really warms up? I was thinking that the buells are cold natured even though the cold cycle was finished, it might have still not be completely warmed up?
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Jdugger
Posted on Wednesday, August 26, 2009 - 02:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If I blip the throttle quickly from idle, the bike stalls every time.

Have some revs up before you dump a bunch of gas into it, for sure.
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Bott
Posted on Wednesday, August 26, 2009 - 02:50 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Mine did it LOUD cycling down on a dyno pull. Tech said it happens occasionally, not to be concerned.(by the way, I have a GREAT dealer)
not the same scenario you described,but as D_adams said--it happens....
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Jpowell490
Posted on Wednesday, August 26, 2009 - 02:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Good to know, Thanks for the responses guys. One doesn't expect that from fuel injection, but I know the Buell acts a bit differently.

Lesson learned , 1125 does not like quick throttle blips
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Endoman33
Posted on Wednesday, August 26, 2009 - 02:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

you can not blip the throttles on these bikes unless you are running hard and are going for a down shift in my opionon. Everyone who has come in to test ride wants to blip the throttle just after starting the bikes or trying to take off on the bikes and it kills the bikes. I don't know why but thats what I have seen in 2 years. Now on my 1125R I don't blip the throttle and mine dosen't die.These ARE NOT FACTS just what I have seen as a sales person.
On this bike it has a slipper clutch so there is no need to blip the throttle on a down shift, unless you are racing.
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Lastonetherebuys
Posted on Wednesday, August 26, 2009 - 02:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I think it is notorious for a V-Twin to do this in general. My 1125r is the first sport bike I have owned, it does the same thing from time to time.The bike i had b4 this one was a yamaha roadstar warrior (big 1800cc vtwin crusier) and it would do the same for me. Same goes for my dad's roadstar, and my brother's roadstar

I think it has something to do with the size of the pistons in a twin compared to a 4 cyl. A 4 cyl is alot easier to keep spinning with the smaller surface area of the pistons
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Bott
Posted on Wednesday, August 26, 2009 - 03:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I still blip on backshifts-old habits are hard to lose. Bike has never stalled from this
but will ONCE in a while stall from blipping off idle, like Jdugger's,but not always.
THAT habit was easy to break-ya get sick of stalling,and it happens more often depending on amount of witnesses
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Jpowell490
Posted on Wednesday, August 26, 2009 - 03:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yea I have a bad habit of doing that from racing pro ama supercross/motorcross in the 90's. The dirt bikes have no idle circuit so you are constantly blipping through slow downs and just sitting.

You are right, old habits are hard to break.
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Bott
Posted on Wednesday, August 26, 2009 - 03:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

not unlike the 'Kiehin Cough' the Tubers/Sporty's do, when lots of people are watching...
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Carbonbigfoot
Posted on Wednesday, August 26, 2009 - 03:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Does your bike still have the 'noid? Mine would kill the bike if blipped from idle.

R
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Jpowell490
Posted on Wednesday, August 26, 2009 - 04:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yea it is brand new carbonbigfoot. Does removal of that fix that issue?
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Jdugger
Posted on Wednesday, August 26, 2009 - 04:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

> On this bike it has a slipper clutch so there is no need to blip the throttle on a down shift, unless you are racing

This is just absolutely NOT a generalization that can be made about the 1125r. As has been discussed here at length, the "slipper" action often isn't very slippery at all on the 1125r!

If fact, it's only with a heavy rider doing quite a massively abrupt down shift while completely off throttle that one is likely to get any "slipper action" at all. And certainly if you are looking for the slipper to save you from breaking the rear loose if you dump a down shift sloppily while turning in... well, I think you are in for a BIG surprise, and possibly a low-side.

Matching revs using a throttle "roll up" (not blip on the 1125r! : ) ) or feathering out the clutch are still the right way to complete a down shift.
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Chadhargis
Posted on Wednesday, August 26, 2009 - 04:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Humm...I've never had my 1125 cough through the airbox, and I've blipped the throttle plenty.

Mine is an '09, so I don't know if that makes a difference. It's my understanding that the latest flash for the '08 bikes it comparable to the '09.
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Luisemilio25r
Posted on Wednesday, August 26, 2009 - 05:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ok this is my opinion: When my 1125r was new (less than 1000 miles) it used to do exactly the same as yours. I attribute this to the engine being "tight" still. After the brake-in it became less and less notorious. Now it is hard to make it stall. Of course, I don't blip the throttle while the bike is not moving.
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Ccryder
Posted on Wednesday, August 26, 2009 - 05:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It should go away, these engines are VERY tight when new. Even up to a few thousand miles. Most riders will note that around the 4,500-5,000 mile mark that they really feel the smoothness and even the engine liking to rev easier. Now Chad's CR is a different story since it was probably abused when it was real young by throttle happy Buelligans (like me) did I say that?

Anyway, once the Helicon is warmed up and broken in it will take any abuse you you try and hand out, at least that's what I have seen in the last 26,000 miles.

TIme2Ride.

Neil S.
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Carbonbigfoot
Posted on Wednesday, August 26, 2009 - 05:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yea it is brand new carbonbigfoot. Does removal of that fix that issue?

I would Highly recommend ditching the solenoid. Mine would kill the bike if blipped at like a stopsign or red light. Really irritating. I only had it a couple of weeks before I did the solenoidectomy.

Highly recommended.

R
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Chadhargis
Posted on Wednesday, August 26, 2009 - 05:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yeah...mine was the demo bike.

I did it's first oil change and was very happy to find that it didn't have much metal spooge on the drain plug magnet or in the filter. Most bikes I've had, the first oil change looked like glitter in the used oil.
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Blake
Posted on Wednesday, August 26, 2009 - 05:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

No blip throttle. No problem, yes?
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Jpowell490
Posted on Wednesday, August 26, 2009 - 06:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I really appreciate everyone's input here. I learn something new everyday here. I will most likely do the noidendectomy, looks pretty simple.

Thanks again fellas,
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Carbonbigfoot
Posted on Wednesday, August 26, 2009 - 06:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

metal spooge on the drain plug magnet

When I just did the 6200 (or whatever, 10kK) service mine has a significant amount of silvery magnetic sludge filling the area around the magnet. Normal?

No blip throttle. No problem, yes?

HA! Like that's an option....

R
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Chadhargis
Posted on Wednesday, August 26, 2009 - 08:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Mine had the typical amount of sludge. But I've seen worse. Change the oil in a BMW final drive and you could build a small car with the amount of metal you'll find on the drain plug.
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Zac4mac
Posted on Wednesday, August 26, 2009 - 10:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have never seen metal on my drain plug magnet.
Even when I lost some of a cam lobe(warranty repair), just fine black mud.

I blip the throttle a lot, now that I have the Drummer.
I love the F1 Growl.

Z
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Ccryder
Posted on Wednesday, August 26, 2009 - 10:56 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I had the fine black "mud" too. Since I did 4 oil changes in the first 1000 miles it was minimal each time, and that's why you do it that. The quicker you get out all that manufacturing/ break in left overs, the better IMHO.

Oh yeah, once I had the last flash my slight off idle dieing went away. Before that I had it make me do a Arti Johnson 0mph fall over. More embarassing than anything else.

Time4Sleep
Neil S.
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Andros
Posted on Thursday, August 27, 2009 - 06:58 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

my ducati did exactly the same but the issue was fixed when i got the powercommander on it. hence giving it more fuel.
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Ccryder
Posted on Thursday, August 27, 2009 - 08:32 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I guess that's what the last flash did but, I'm no "fueling expert" so I'll just say: Thank you Buell! (BTW,No Power Commander needed)
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Jpowell490
Posted on Thursday, August 27, 2009 - 08:56 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Well I think my first order of business is to get rid of the noid. Then I will see how it behaves from there.
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