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Honda VFR1200X Crosstourer
»
Main Crosstourer Discussion Boards
»
General Maintenance, Servicing, and Mechanical issues
»
Engine slack with low rpm
25 May 22, 16:54 pm
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Engine slack with low rpm (Read 1222 times)
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CT_Ron
Crosstourer Pro ‐
183
Topic Author
CT_Ron
Crosstourer Pro
Topic Author
Posts: 183
Bike: VFR1200X (2014)
City / Town: Borne
Engine slack with low rpm
on:
Jun 09, 2021, 08.04 pm
Jun 09, 2021, 08.04 pm
Whenever I ride slow in 1st or 2nd gear and the rpm's go fairly low due to traffic speed, either the engine or final drive is slacking like hell. It's chugging along making this clattering, yanking noise. It's like someone is repeatedly yanking on a loose backrest, clattering.
I cant figure out if this is clutch, final drive, or general engine related. Anyone else experiencing this? Other than that, the bike runs fine.
__Ray__
Crosstourer Pro ‐
435
#1
__Ray__
Crosstourer Pro
Posts: 435
Bike: Honda VFR1200X
City / Town: Brunssum
Country:
Re: Engine slack with low rpm
Reply #1 on:
Jun 09, 2021, 08.28 pm
Jun 09, 2021, 08.28 pm
It's the free play in the final drive and the lean programmed ECU due to emission demands.
You'll never get rid of it completely but on mine it was al lot less after the sabsteef flash.
In first he's nervous because that gear is short and aggressive and in seccond the RPM's are often too low and than it's the worst with the OEM programming.
CT_Ron
Crosstourer Pro ‐
183
Topic Author
#2
CT_Ron
Crosstourer Pro
Topic Author
Posts: 183
Bike: VFR1200X (2014)
City / Town: Borne
Re: Engine slack with low rpm
Reply #2 on:
Jun 09, 2021, 08.39 pm
Jun 09, 2021, 08.39 pm
Well I'm not going tinkering on the final drive. A fresh oil bath is all it's getting...
It's a shame, because it really does take away the fun of city driving. As you said, I either have to ride aggressive in first or headbang away in 2nd... I have a feeling it has gotten worse. My bike has 105K on the clock.
DE65Y
Crosstourer Pro ‐
224
#3
DE65Y
Crosstourer Pro
Posts: 224
City / Town: Widnes
Country:
Re: Engine slack with low rpm
Reply #3 on:
Jun 10, 2021, 11.22 am
Jun 10, 2021, 11.22 am
If I'm going slow enough for free play to show, then I personnally would be applying the back brake (and a little bit of the front - linked brakes) in order to keep things taught.
Isn't that also supposed to help with balance.
CT_Ron
Crosstourer Pro ‐
183
Topic Author
#4
CT_Ron
Crosstourer Pro
Topic Author
Posts: 183
Bike: VFR1200X (2014)
City / Town: Borne
Re: Engine slack with low rpm
Reply #4 on:
Jun 10, 2021, 11.34 am
Jun 10, 2021, 11.34 am
It is, but I'm still well balanced at 15kmph, but the slack is already there in 2nd gear, when I let the engine chuck forward
matt28
Crosstourer Pro ‐
165
#5
matt28
Crosstourer Pro
Posts: 165
Bike: 2018 CT manual
City / Town: Kent/Noord NL
Re: Engine slack with low rpm
Reply #5 on:
Jun 10, 2021, 12.00 pm
Jun 10, 2021, 12.00 pm
I had the same, then installed Booster Plug and noticed after yesterday's ride that final drive backslash is noticeably smaller, but still can feel it.
CT_Ron
Crosstourer Pro ‐
183
Topic Author
#6
CT_Ron
Crosstourer Pro
Topic Author
Posts: 183
Bike: VFR1200X (2014)
City / Town: Borne
Re: Engine slack with low rpm
Reply #6 on:
Jun 10, 2021, 12.14 pm
Jun 10, 2021, 12.14 pm
Originally Posted by
matt28
I had the same, then installed Booster Plug and noticed after yesterday's ride that final drive backslash is noticeably smaller, but still can feel it.
I've read about the boosterplug. Is it easy to install? I'm no stranger in removing crosstourer parts, but I really don't want to deal with any computer software.
matt28
Crosstourer Pro ‐
165
#7
matt28
Crosstourer Pro
Posts: 165
Bike: 2018 CT manual
City / Town: Kent/Noord NL
Re: Engine slack with low rpm
Reply #7 on:
Jun 10, 2021, 12.17 pm
Jun 10, 2021, 12.17 pm
Originally Posted by
CT_Ron
I've read about the boosterplug. Is it easy to install? I'm no stranger in removing crosstourer parts, but I really don't want to deal with any computer software.
Very easy, same work as when you replacing air filter -
https://www.crosstourer.com/index.php/topic,7092.8.html
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