How do I get stronger pull at low rpm on my K1200rs

[bludandi]

Can someone please tell me what to tell my certified bmw mechanic -I need to
improve my 03'K1200rs power performance in the low to mid range rpm(2000-3000rpm. My bike has 10,000 miles and has poor throttle response In the 2k-3k
power range.It display no diagnostic faults. The onley modification was installation
of z-technic pipe and chip four years ago.What has to be tuned to fix this problem.

 

[PGlaves]

Can someone please tell me what to tell my certified bmw mechanic -I need to
improve my 03'K1200rs power performance in the low to mid range rpm(2000-3000rpm. My bike has 10,000 miles and has poor throttle response In the 2k-3k
power range.It display no diagnostic faults. The onley modification was installation
of z-technic pipe and chip four years ago.What has to be tuned to fix this problem.

I don't have a Ztechnic pipe or chip on any bike I own, so can only speculate. But if that were my bike and I was unhappy with low-end and mid-range grunt I would go back to stock configuration and start there.

Actually, the 2000 to 3000 rpm range is not too rubust at all - even on that motor - so shift at a higher RPM as a place to start.

Is this a condition that just showed up - or the bike has just been like that?

 

[karlfitt]

3000 RPM is barley spinning that engine.
Red line is 9400 RPM.
The power peak is at 8750 RPM
Torque peak is at 6750 RPM.

Grab some more of the loud handle if you want better acceleration.

I find mine to be sneaky fast.
But I also ride it above 3000 RPM.

 

[Rinty]

stronger pull

I would go back to stock configuration....PGlaves

Blu:

The simplest way to start would be to install the stock chip; the Z Technic chip may have moved the power up the rpm scale somewhat. Your local tech may have one that you can borrow, for a test drive. I recently rode a chipped K 1, and it was very flat below 4,000 rpm.

Depending on what happens, you can decide about changing the pipe, but it's probably not doing too much mischief.

I've only ridden the K 12 RS once, and it was a rocket. But as noted above, you need to spin them up for performance; not too much is going to happen between 2 and 3 thousand.

Rinty

 

[From MARS]

Can someone please tell me what to tell my certified bmw mechanic -I need to
improve my 03'K1200rs power performance in the low to mid range rpm(2000-3000rpm. My bike has 10,000 miles and has poor throttle response In the 2k-3k
power range.It display no diagnostic faults. The onley modification was installation
of z-technic pipe and chip four years ago.What has to be tuned to fix this problem.

I have the same bike with a few more miles, but stock setup. The power really doesn't kick in until you pass 4000 rpm's. If you really want to get up to speed fast, keep it up around 6-8K. 'Course, you'll already be exceeding the speed limit before third gear.

If you ride two up, be sure to warn your passenger before cranking the throttle if you're above 6K. It'll scare the heck out of them otherwise, and they get really p***ed. DAMHIK!

Tom

 

[bmwmick]

Can someone please tell me what to tell my certified bmw mechanic -I need to
improve my 03'K1200rs power performance in the low to mid range rpm(2000-3000rpm. My bike has 10,000 miles and has poor throttle response In the 2k-3k
power range.It display no diagnostic faults. The onley modification was installation
of z-technic pipe and chip four years ago.What has to be tuned to fix this problem.

Go here and read some: http://bmwsuperbikes.com/forum/viewtopic.php?f=3&t=9473&p=62757&hilit=throttle#p62757

 

[Rinty]

stronger pull

The...chip may have moved the power up the rpm scale somewhat. Rinty

I spoke to a tech (an ex racer) at Oktoberfest yesterday, and he said this is not correct, that it's cam alterations that affect powerband characteristics. The chip affects fuel delivery characteristics. He commented that these aftermarket chips are ineffective at higher altitudes, because the extra fuel delivered can't be combusted.

But that wouldn't be a factor in your case, Blu, because you're at sea level.

Rinty

 

[PGlaves]

I spoke to a tech (an ex racer) at Oktoberfest yesterday, and he said this is not correct, that it's cam alterations that affect powerband characteristics. The chip affects fuel delivery characteristics. He commented that these aftermarket chips are ineffective at higher altitudes, because the extra fuel delivered can't be combusted.

But that wouldn't be a factor in your case, Blu, because you're at sea level.

Rinty

That may be right for some chips. But that is not right when a different pipe is thrown into the mix. Exhaust flow characteristics have a lot to do with where in the power band peak torque and peak horsepower are achieved. And how high those peaks are. And how torque and hp develop throughout the entire RPM range.

Some aftermarket pipes might make slight improvements somewhere in the power band. Other pipes have been shown in dyno tests not to.

The purpose of a chip sold with a pipe is to complement the changes made by the pipe with corresponding changes to the injection map to give an overall better result - in theory. Yes - all the chip really does is alter mixture (and maybe timing) but if this is what is needed to complement the pipe - then the pipe/chip combination does indeed alter the power band location and characteristics.

I think you only got half the answer from the tech/racer.

 

[Rinty]

stronger pull

Exhaust flow characteristics have a lot to do...PaulGlaves

Oops; forgot about the gas flow (and it's one of my favourite topics). Thanks, Paul. In fairness to the tech, we were just talking about cams and chips. He's really good.

Rinty

 

[bludandi]

Low Power '03'k1200rs with Ztechnik pipe&chip

Thanks to everyone ,who took the time to read and reply to my low power
k1200rs -I will be taking the bike this thursday, 10/02/08 to my local bmw service rep.
The poor throttle response and accompanying low power output is actually in the 2.5K-3.5K rpm range.[/COLOR]Please continue to send your possible solutions -and thanks for the love .... blu