Versys Forum

Please login or register.

News: Join Now ! Members have access to areas that guests cannot see.



Author [NL] [FR] [ES] [DE] [SE] [IT] [NO] [MY] Topic: gear hammers / load changes 2-4k rpm  (Read 1025 times)

0 Members and 1 Guest are viewing this topic.

Online uralrob

  • Versys Mega God
  • ******
  • Posts: 10106
  • Bike: 08 V 650 15 V1k
  • City / Town: Bridgewater NS
  • Country: ca
Re: gear hammers / load changes 2-4k rpm
« Reply #10 on: Mar 15, 2020, 11:12 AM »


 I think Dr. B. had a black bike with an American ecu.

 Almost the same thing, except for the colour  :003: .

 Did I ever mention the red bike that I had, the one with the Canadian ecu? No? Well then pull up a chair, eh.

  :2:  :2:

  Rob.
Don't take Life too serious, it's not permanent.

Online Bart

  • Versys God
  • *****
  • Posts: 3071
  • City / Town: West Wales
  • Country: 00
Re: gear hammers / load changes 2-4k rpm
« Reply #11 on: Mar 15, 2020, 04:06 PM »
*Originally Posted by uralrob [+]


 Did I ever mention the red bike that I had, the one with the Canadian ecu? No? Well then pull up a chair, eh.

  :2:  :2:

  Rob.

I think we all may need a big big bag of popcorn...
RD250, XJ600, VFR750, CBR900, Hornet 600, RD400, RD350 YPVS, CBR600 Sport, DRZ400, DR650, XT660R, BMW R1100RS, Versys 650, CBR1000RR, Versys 650, AdvVersys 650, CB1300S, VF1000, MkII V1k, XT1200ZE, Vstrom 650

Offline Gustavo

  • Hardcore Member
  • Versys Mega God
  • *
  • Posts: 6712
  • Wanna be moto magazine writer
  • Bike: Classic Red
Re: gear hammers / load changes 2-4k rpm
« Reply #12 on: Mar 15, 2020, 05:19 PM »
*Originally Posted by STOKIE [+]
Didn't Dr Bones fit an American ECU. I seem to remember that he gave me some information when I was sorting and fitting my new ECU. It certainly cured my fueling problems.

Yup, that's why he called it "I've painted the inside of my Versys RED", after the red US models that had no such issues (open loop ECU design).  Unfortunately, it doesn't work on Mk3 bikes, US models also have an O2 sensor and are closed loop designs.

Gustavo
Always yield to temptation, it may not pass your way again - Ken Morton

Offline markusjs85

  • Versys Newbie
  • *
  • Posts: 2
  • ~~~~ZenMode~~~~~~~
  • Bike: Versys 650 2016
  • City / Town: Hong Kong
  • Country: hk
Re: gear hammers / load changes 2-4k rpm
« Reply #13 on: Mar 18, 2020, 06:14 PM »
Hi folks
some good answers around here, thx 2u all.

Ive tightened the chain, adjusted the clearance of the gas control, and put the idle gas to 1500rpm. Helped a bit.

But the jerking and sudden pushing at constant speed stays.  "constant speed jerking".

At Kawasaki workshop at least they finally admitted the problem exists... after telling me for a whole year "no problem with your bike, we checked it all."

In the end told me "Yes, your bike has that issue, just make sure you go faster than 40 km/h..."
I thought my ears have some problem. Effing morons.

What do you think about a K&N-airfilter and some iridium power spark plugs?
Should make the mixture leaner at first, but the lambda probe "fattens it up"...   well, I read that.

thx in advance for answers!
See the curve
let loose
let go
and itīll pass *you

Online Stewie

  • Versys Mega God
  • ******
  • Posts: 6722
  • No longer The Sorcerer's Apprentice
  • Bike: Bike bereft
  • City / Town: Barwell, Leics.
  • Country: 00
Re: gear hammers / load changes 2-4k rpm
« Reply #14 on: Mar 18, 2020, 06:50 PM »
Are there any tight links in the chain?

This could cause weird sensations as you are riding.

Offline Gustavo

  • Hardcore Member
  • Versys Mega God
  • *
  • Posts: 6712
  • Wanna be moto magazine writer
  • Bike: Classic Red
Re: gear hammers / load changes 2-4k rpm
« Reply #15 on: Mar 19, 2020, 04:06 AM »
*Originally Posted by markusjs85 [+]

But the jerking and sudden pushing at constant speed stays.  "constant speed jerking".

At Kawasaki workshop at least they finally admitted the problem exists... after telling me for a whole year "no problem with your bike, we checked it all."

In the end told me "Yes, your bike has that issue, just make sure you go faster than 40 km/h..."
I thought my ears have some problem. Effing morons.

What do you think about a K&N-airfilter and some iridium power spark plugs?
Should make the mixture leaner at first, but the lambda probe "fattens it up"...   well, I read that.

thx in advance for answers!

No, it's the other way around.  It's trying to keep it very lean at small throttle opening/low RPM, that's why it's surging.  Your initial description threw a lot of us off, it could have been a chain problem, but now that you checked the chain and described the issue a little better, I think you have a typical modern motorcycle problem - lean low RPM tuning to meet emission standards. 

The K&N filter will do the opposite of what you need.  The plugs have no effect.  What you need is a EFI tuner to add some fuel in the low range or at the very least, a booster plug type device.

Gustavo

Always yield to temptation, it may not pass your way again - Ken Morton

Online jonnster71

  • Versys God
  • *****
  • Posts: 1699
  • Not a bird and not a plane.
  • Bike: Versys Mk2 ABS
  • City / Town: Stroud
  • Country: 00
Re: gear hammers / load changes 2-4k rpm
« Reply #16 on: Mar 19, 2020, 08:03 PM »
+1
As a general rule of thumb, if Gustavo says something it's worth listening.

I can attest to the positive effect of the Boosterplug in richening (is that English?) the fuelling at the lower end.

The reason why this is an issue is because of emissions regulations, causing the manufacturers to lean out the fuelling in the least damaging segment of the rev range in order to achieve regulatory targets without producing a fuel map that blows up engines.

In short, it's an artificial problem resulting from stupid laws. :172:

Yes...it's annoying! :125: :125: :125:

Offline TimTyler

  • Versys Pro
  • ***
  • Posts: 181
  • Bike: 2014 Versys
  • City / Town: Olympia, WA
  • Country: 00
Re: gear hammers / load changes 2-4k rpm
« Reply #17 on: Mar 21, 2020, 09:05 PM »
Google Versys TPS adjustment

You'll need an adapter cable similar to this one https://www.partzilla.com/product/kawasaki/57001-1400

Fixing this issue on my 2014 Versys made my bike rideable.
Tim
2014 Versys 650 & 1991 BMW K75
http://timtyler.com  http://mototrek.net