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[bearingman]

I just installed my super tuner on the serg, and I wondered if anyone has gotten good low end throttle response tuned in.  When I blip the throttle at idle, there is very little response.  I have played with the spark advance numbers but have had limited success getting good response.  I would appreciate any info. on spark advance numbers at 20 - 40 MPa and 750 to 1500 rpm.  Thanks in advance.

[moscooter]

 
To me,  you need to be more specific with your interpretation of "throttle response" at low rpms......

Some have had or are having problems with "lag" and the (fly by wire) throttle mechanism.  This could be someones view of poor throttle response.  The gearing in the newer models is not as low as in the past.  As a result,  low speed and rpms are not as responsive......Cam choice plays a part in where you will really get good response,  rpm range-wise.

Is your set-up "stock" and you are trying to max out your torque numbers on the low-end.........Mine doesn't come on good till around 2500 rpms or so........but I went to a T-Man 625 cam and other stuff.

I'm not trying to confuse the question you are asking,  just thinking you will get better answers if you relate a little more about what you are after.

[bearingman]

I am simply blipping the throttle in neutral from idle.  The response from the motor is not much.  I am running with a non cat header and 1-3/4 fullsac baffles.
I have the AFR pretty close to where I want it, but low end does not seem responsive.  If I try to pull out quickly in first gear the motor shudders.
I have to give it extra revs and feather the clutch to avoid this.  I realise 1st gear is too tall, but I thought that the problem could be partially corrected by getting the spark timing optimized.  Was hoping to find out what spark advance others had in the range mentioned above.
Thanks

[ZOOMballs]

I'm not sure about the "super tuner". I had mine dyno'd after the "pro tuner" was installed with heavy breather & slip-ons. It made 99/120 at the rear wheel.

[jfh]

I am simply blipping the throttle in neutral from idle.  The response from the motor is not much.  I am running with a non cat header and 1-3/4 fullsac baffles.
I have the AFR pretty close to where I want it, but low end does not seem responsive.  If I try to pull out quickly in first gear the motor shudders.
I have to give it extra revs and feather the clutch to avoid this.  I realise 1st gear is too tall, but I thought that the problem could be partially corrected by getting the spark timing optimized.  Was hoping to find out what spark advance others had in the range mentioned above.
Thanks

Sounds like it could possibly be attributed to throttle progressivity settings.  You can adjust them in the SSERT to improve responsiveness.

[bearingman]

hdfr120, you may be on to something there. I set the progressivity to max levels thinking it would act 'true', but that may have been a mistake.
Thanks

[moscooter]

 
Let me add just one more point......given your latest response.  Hopefully,  you are allowing 15-20 minutes (minimum) of warm-up time before you are measuring results.

My old M&M (2001) RK Classic.........could take off immediately after start-up and go without any hiccups or staggering, etc.  My new 2009 Ultra SE 110 is extremely COLD BLOODED............trying to get any reasonable "responsiveness" via the throttle........until 15-20 minutes go by............is a waste of time.

[moscooter]

 

Here are my results........

http://www.cvoharley.com/smf/index.php?topic=36505.45

[sblair]

Mine does the same thing and it sounds like I have the exact same setup.  Its also been Dyno'd.  The electronic throttle has that little dead spot right at the beginning.  I usually blip it slightly just before I start letting out the clutch but often get that little shuuder on takeoff.  After that she is very responsive especially 3500-5500 rpm!

[Steve Cole]

The SESPT has a little know problem in it. The throttle table adjustment doesn't work in all gears, netural being one of them. So setting it to the stock values or maxing it out isn't going to change the issue. Your going to have to live with it or get a Mastertune to fix it.

[9 1/2 Beers]

Mine does the same thing and it sounds like I have the exact same setup.  Its also been Dyno'd.  The electronic throttle has that little dead spot right at the beginning.  I usually blip it slightly just before I start letting out the clutch but often get that little shuuder on takeoff.  After that she is very responsive especially 3500-5500 rpm!

 I have the same problem, so at low speed like cyn's. , turning at stop lights and signals makes it a little difficult.

Marty

[eddfive]

It is all about the tune especially at the low throttle or no throttle on the FBW's.  I spent a lot of time figuring this out way back in the old SERT and 200 application, I could get them to respond almost and I emphasize almost like a cable bike.  I have tuned a lot of FBW's now with the SEST and there is no problem with Throttle lag just off idle, ask some of the guys I have tuned from this forum.  If a cable bike is not tuned correctly just off idle it will "blubber" as well.  The devil is in the details!!!

[DICKW]

It is all about the tune especially at the low throttle or no throttle on the FBW's.  I spent a lot of time figuring this out way back in the old SERT and 200 application, I could get them to respond almost and I emphasize almost like a cable bike.  I have tuned a lot of FBW's now with the SEST and there is no problem with Throttle lag just off idle, ask some of the guys I have tuned from this forum.  If a cable bike is not tuned correctly just off idle it will "blubber" as well.  The devil is in the details!!!

So what is the trick ?

There was no explanation in your explanation.

What are you doing during the tune that others are not doing?

[eddfive]

No trick, have to pay close attention to data and tune this area correctly.

[DICKW]

No trick, have to pay close attention to data and tune this area correctly.

OK all set now thanks