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Author [ES] [MY] [PL] [PT] [IT] [DE] [FR] [NL] [DK] [NO] [GR] [TR] Topic: Changing sprockets  (Read 13001 times)

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Online ras

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Re: Changing sprockets
« Reply #90 on: June 04, 2019, 01:13:31 PM »
*Originally Posted by Scim77 [+]
How many miles have you 16T guys done and has the EML had come on yet?

I never noted the  milage but over 7500 miles on a 16 front and no code. That is utter BS if people can not change the gearing with out throwing a code.

Offline Scim77

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Re: Changing sprockets
« Reply #91 on: June 04, 2019, 02:07:40 PM »
*Originally Posted by ras [+]
I never noted the  milage but over 7500 miles on a 16 front and no code. That is utter BS if people can not change the gearing with out throwing a code.

Thanks ras.  That is good news. Once I eventually get the EML light to go off, I will refit the 16T front sprocket (I am temporarily back on standard 15/44).

It is irritating that the ECU software has to be written in this way, in order to identify possible sensor failures. However, from your experience, it looks like there may be a tolerance of up to 10% , and this window is allowing you to run the 16T.  Cheers.
Who in their right mind would design a vehicle that falls over when it stops?

Online zed9

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Re: Changing sprockets
« Reply #92 on: June 04, 2019, 02:15:49 PM »
*Originally Posted by Scim77 [+]
Has anyone else experienced the EML light (code 25) coming on, when running either 16/44 or 16/41?

I spoke with Kawasaki technical, who confirmed that the factory mapping would notice the deviation from factory 15/44 and throw up a warning light, as I suspected.  I also asked them what the tolerance was, in case 16T alone might be tolerated but they did not know. For example, if we had a 7% tolerance, then either a 16T front OR a 41T rear might go unnoticed by the mapping.

How many miles have you 16T guys done and has the EML had come on yet?
Did the tech mention how the ECU knows about the gearing change? Does it count the wheel RPM through the ABS and match it up with the gearbox/engine RPM or perhaps reading something through the oxygen sensor?

The code is a final drive code, am I correct? So most likely figuring out RPM. I would imagine it must have a tolerance owing to owners changing to tires with different dimensions.

Offline MZ900

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Re: Changing sprockets
« Reply #93 on: June 04, 2019, 02:42:05 PM »
Riding my 16t everyday , at least 50km/d.  No probs here

Offline Scim77

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Re: Changing sprockets
« Reply #94 on: June 04, 2019, 02:49:39 PM »
Hi zed9 & MZ900.
Kawa Technical implied that the three sensors involved are the rear wheel ABS/speed sensor, the engine speed sensor and the gear position indicator.  Code 25 is the gear position sensor.
So the diagnostics are fairly intelligent. They seem to be happy that the engine speed is ok, the wheel/road speed/ABS info is ok, but neither seem plausible for the particular gear selected. Hence it thinks that there is a gear position sensor fault. This all seems to be logical, considering that I was running at 16/41, roughly 14% outside factory optimums.
It seems likely that factory may be working on a 10% tolerance before error codes throw up. Hence either a 16T front OR a 41T rear would be within acceptable limits, but the two in combination would exceed the limits. Thats my opinion.
Thanks for your replies.
Who in their right mind would design a vehicle that falls over when it stops?

Online zed9

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Re: Changing sprockets
« Reply #95 on: June 04, 2019, 06:04:47 PM »
Scim, I'll buy that. Now to put some tape over the fault code indication.

Offline Scim77

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Re: Changing sprockets
« Reply #96 on: June 05, 2019, 09:22:58 AM »
*Originally Posted by zed9 [+]
Scim, I'll buy that. Now to put some tape over the fault code indication.

 :002:
I got the light off by using the 3 heat cycle over 40mph method. I now run 16T front 44T rear.
Who in their right mind would design a vehicle that falls over when it stops?

Online Simoncrp

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Re: Changing sprockets
« Reply #97 on: June 05, 2019, 06:25:22 PM »
I've put on around 450 miles so far on the 16 teeth and so far all is good. No fault light.

Offline noext

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Re: Changing sprockets
« Reply #98 on: June 07, 2019, 02:29:50 PM »
hello i have a z900 2018 with abs ( european bike ), if i change the front sprocket do the speedo will be wrong after that ?

Offline Rolltide97

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Re: Changing sprockets
« Reply #99 on: June 07, 2019, 02:45:05 PM »
I've done a few changes on mine and the speedo stayed about 4 mph off the whole time, no difference.