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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through November 23, 2009 » Surging @ low rpm's « Previous Next »

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Krash01
Posted on Friday, November 20, 2009 - 09:49 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I just picked up an 1125 CR last week. I have noticed that it surges @ low rpm's (<4000), especially in first gear. Is this normal, or should I have the stealership take a look at it?
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Gotlime
Posted on Friday, November 20, 2009 - 09:58 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Have it reflashed. Problem solved.
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Freezerburn840
Posted on Friday, November 20, 2009 - 10:00 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ask them what the firware is on your bike. I just got the newest 152 flash wednesday it is a keeper it will get rid of the low rpm surging. Not completely but a big improvement.

http://www.badweatherbikers.com/buell/messages/290 431/513831.html?1258645354

(Message edited by freezerburn840 on November 20, 2009)
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Avc8130
Posted on Friday, November 20, 2009 - 10:09 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Downshift.
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Jdugger
Posted on Friday, November 20, 2009 - 10:11 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

> Downshift.

It's the best advice, and it solves all sort of "problems" with the bike, but it's like asking someone to shoot their mother around here.
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Gotlime
Posted on Friday, November 20, 2009 - 10:14 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If you're in 1st and going through your neighborhood, a park or a parking lot then there's no where to downshift to AND riding around at 4k+ rpms can be problematic.

Why not get the bike right so you can ride HOW you want WHEN you want? : )
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Blazin_buell
Posted on Friday, November 20, 2009 - 10:29 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Is O5Z still the latest flash for the '08? I finally had it done a few weeks ago and it still sucks < 5k in 1st-3rd gear. I'm too broke now for the "other" tuner mods out there at the moment.
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Avc8130
Posted on Friday, November 20, 2009 - 10:33 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You have an 1125cc V-twin between the frame rails. 60+mm throttle bodies feed it. This is so it can be happy at high RPMs where it makes horsepower. Intake velocity goes way down at low RPMs and it is just really hard to meter fuel properly. Just downshift. How long do you people ride around neighborhoods? I do 25-30mph for no more than 5 miles. My bike is happy in 1st the whole time.
ac
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Phillyblast
Posted on Friday, November 20, 2009 - 10:33 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

062(Z) is the latest.
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Milleniumx1
Posted on Friday, November 20, 2009 - 10:41 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Put the latest flash on it ... Then your problem will become a distant memory.

Mike
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Gotlime
Posted on Friday, November 20, 2009 - 10:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Philly,

I believe 52 is the Cr and 62 is the R.

Can someone confirm?
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Homer007
Posted on Friday, November 20, 2009 - 11:01 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

lol at all the people suggesting you ride at over 4000 rpm ALL the time. it's an easy fix so why live with it? as people have said, get the latest flash and it will improve big time.
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Blazin_buell
Posted on Friday, November 20, 2009 - 11:03 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks, Philly.
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Whynot
Posted on Friday, November 20, 2009 - 11:07 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

What they said about the latest flash. Looks like you have an 09 CR. Got my 08 R flashed yesterday (062 for the 08), now it's totally smooth at all speeds. In traffic, I can now ease away from stops at 2000rpm, then pull smoothly up to the next light. There's like 6 lights to go through in the half mile surrounding my dealer, so it got a good test yesterday on the way home.
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Metalrabbit
Posted on Friday, November 20, 2009 - 11:12 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I wonder about all this flashing stuff,, I'm concerned about what I could lose from what I already have. What I'm getting at is many have went to "the latest flash" mostly because they didn't like the bucking at lower rpms. I just wonder how many of "those people" have rung this bike out to over 150mph and back and are suggesting the "latest flash" on here.

Just wondering,,,
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Krash01
Posted on Friday, November 20, 2009 - 11:21 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

> Downshift

It's pretty hard to downshift when you are in first. I'm pretty sure Erik Buell didn't invent a super secret 0 gear.

Reading is fundamental
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Avc8130
Posted on Friday, November 20, 2009 - 11:24 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If you are less than 4k in first you are CRAWLING. Use the clutch.
ac
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Poppinsexz
Posted on Friday, November 20, 2009 - 11:28 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Blazin- If your having problems above 4000 then you may have something else wrong with the bike.

My 08 with the 5Z flash is smooth as silk at 4000 and I can cruise down to 3500 with no real problems.
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Phillyblast
Posted on Friday, November 20, 2009 - 11:31 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Limey,
the 062 I mentioned is for the 08 bikes. There are actually 3 different ones out, 08R (062) flash, 09R flash (142), and 09CR flash (152).
D
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Chessm
Posted on Friday, November 20, 2009 - 11:34 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

if you are spending that much time at 150+mph speeds then i would suggest a professional tune on a dyno instead.
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Homer007
Posted on Friday, November 20, 2009 - 11:42 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I wonder about all this flashing stuff,, I'm concerned about what I could lose from what I already have. What I'm getting at is many have went to "the latest flash" mostly because they didn't like the bucking at lower rpms. I just wonder how many of "those people" have rung this bike out to over 150mph and back and are suggesting the "latest flash" on here.

while i've not wrung it to 150 yet, i've taken it to 120 before and after the flash and i can tell you it feels just as strong to 120 after the flash; the only difference being better performance below 4000rpm. i'm not sure how fixing the fueling at low rpms would affect high rpm performance since you can change the values of the map in one location without changing the other..
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Moosestang
Posted on Friday, November 20, 2009 - 11:49 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Get it reflashed. Mine was impossible to ride in 1st gear at any rpms below 5500. I have the 141 flash now and 1st gear is no problem. it will still surge up to 5500 rpms or so, but it's much better. Mine actually surges less if I up shift to 5th and cruise at 3500rpms. That's going about 55mph though.
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Stevej
Posted on Friday, November 20, 2009 - 12:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

141 flash is new for 09' CR 49 state models, had mine done a while back and it made a big difference, no surging, runs cooler and good power.
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Scott0827
Posted on Friday, November 20, 2009 - 12:10 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Metalrabbit, Ive taken my CR to 152 indicated on speedo with the 152 flash, feels just as strong as with 141 flash up high, but smoother running down low and almost no surging!
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Metalrabbit
Posted on Friday, November 20, 2009 - 12:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

hmm, well I'm feeling better about giving it a shot. The wrench I use at my dealer owns a CR and is very good, so I'll give him a call.
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Scott0827
Posted on Friday, November 20, 2009 - 12:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Metalrabbit, Please post up after you get the 152 flash. I know you will be pleased!!!
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Tpoppa
Posted on Friday, November 20, 2009 - 12:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Latest/Greatest
2008 1125R M3HUS062
2009 1125R M2HUS142
2009 1125CR M3PUS152
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Gotlime
Posted on Friday, November 20, 2009 - 12:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks for the facts T"Big"Poppa!!
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Sl33py
Posted on Friday, November 20, 2009 - 12:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Definitely get M3PUS152... I got 142 for my 09R and it's been a really big improvement all around - especially the <3.5k surging i had.

First commute in this AM w/ new flash - smoooth! loving it.

(Message edited by sl33py on November 20, 2009)
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Tpoppa
Posted on Friday, November 20, 2009 - 12:52 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I also have 142 and am very happy with it. I would love to see a dyno with the 142 calibration.
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