• Has your topic been discussed? Check this quick video for search tips. You answer/info might already be waiting!

All 650's PAIR VALVE REMOVAL (improved version)

Brammers

2014
CBR650F ABS
Staff
May 30, 2014
Hampshire, England
I haven't seen anything in the service manuals that indicate a change of design on the rocker cover, so I'm saying "yes, they should fit".

Note the later models will need a resistor if you remove the pipework and solenoid to avoid an engine warning light.

J
 

Xaos636

2015
CBR650F ABS
Feb 22, 2021
Riding Since
2008
I haven't seen anything in the service manuals that indicate a change of design on the rocker cover, so I'm saying "yes, they should fit".

Note the later models will need a resistor if you remove the pipework and solenoid to avoid an engine warning light.

J
I have the 2016 model and getting block off plates has been impossible so far thanks to shipping issues to my country. Now I have a home made setup instead of the blockoff plates. Works fine. Connected both sides of the area with one of the tubes from air valve induction system. Not sure if there is anything wrong in the setup.
 

Attachments

  • 123.jpg
    123.jpg
    2.1 MB · Views: 24
Last edited:

General Monty

2019
CB650R
Jun 5, 2021
Riding Since
1992
So, I’ve read through every post on this thread, as well as some others. I have a 2019 CB650R (U.K), all seems quite straight forward….except this ‘resistor' issue. Electrickery is my weak point, so it’s no good talking impedance, ohms and values to me. Please can you tell me, do I need to fit a resistor to avoid ecu error/dash light ? If so, what do I need to buy ?
Secondly, I going for a dyno/remap, shortly after deleting my pair system. Would the guy carrying out the work not have access to the pair valve 'disable' option in the ECU (as shown in the video in the thread), negating the need for the resistor?
Thanks in advance. 👍🏻
 

General Monty

2019
CB650R
Jun 5, 2021
Riding Since
1992
You do need a resistor to stop the light showing.

The parts have been linked to earlier in the original pair thread (pretty sure I posted them).

J
Thanks for the swift reply. In relation to my last question, do you have any thoughts on this please ?
I'm going for a dyno/remap shortly, after deleting my pair system. Would the guy carrying out the work not have access to the pair valve 'disable' option in the ECU (as shown in the video in the thread), negating the need for the resistor ?
 

Brammers

2014
CBR650F ABS
Staff
May 30, 2014
Hampshire, England
The resistor isn't about disabling the pair, it's about letting the ECU think it's still working.

Blanking the plates disables it. The tuner will want to block the system off during a map anyway.

For more info I'd ask the tuner... I personally don't know what checks can be turned off on the 650r ecu. Disabling of an emissions system check would invalidate the euro4/5 rules.

J
 

General Monty

2019
CB650R
Jun 5, 2021
Riding Since
1992
The resistor isn't about disabling the pair, it's about letting the ECU think it's still working.

Blanking the plates disables it. The tuner will want to block the system off during a map anyway.

For more info I'd ask the tuner... I personally don't know what checks can be turned off on the 650r ecu. Disabling of an emissions system check would invalidate the euro4/5 rules.

J
I realise that, I think you were missing my point, which was, instead of fitting a resistor, so the dash light doesn’t come on, can’t you just 'disable' the pair valve system on the ECU, thus meaning no dash light, without having to fit a resistor ?
 

trippy

2019
CB650R ABS
May 2, 2021
Riding Since
3000
I realise that, I think you were missing my point, which was, instead of fitting a resistor, so the dash light doesn’t come on, can’t you just 'disable' the pair valve system on the ECU, thus meaning no dash light, without having to fit a resistor ?
I think you over-complicate things.
My tuner said he can't remove the pair valve from ECU so I did it prior to the flash. Not sure if it's impossible or if he didn't know/want to.
I have no experience with electronics/electrics. It took me a total of 2 hours to understand what is needed and also solder a few resistors (couldn't get the right one).

Resistor (for this case) has two main properties.
1. Resistance - that actually fools the ECU making it think a consumer is there. The number must be exactly 27Ω.
You might find ±1% or ±5% in specs. Ignore it as it makes no difference on our bikes.
2. Watts - how much current can pass without the resistor overheating. The more, the better. To be safe get a 10W.
Some say 1W works, math indicates 5.3W, I use ~5W with no problem.

There are many options if you search the inter-web for "27 ohm 10 watt resistor near me"
https://willys-hifi.com/collections...ts/mundorf-m-resist-10w-27-ohm-2-mox-resistor
As long as the resistor has printed 10W27Ω or 10W27RJ on it is good regardless of type (metal oxide - like a tube or ceramic - like a rectangle)

Installation is simple.
You just put the resistor wires in the holes of the plug where the pair valve cable was inserted.
If the resistor wire part is thicker than the actual hole you can use pliers to flatten it.
Resistors have no + or - so you can put in any position.
Once inserted put (electrical) duct tape so water will not get in and resistor will stay in place.
 

Brammers

2014
CBR650F ABS
Staff
May 30, 2014
Hampshire, England
I realise that, I think you were missing my point, which was, instead of fitting a resistor, so the dash light doesn’t come on, can’t you just 'disable' the pair valve system on the ECU, thus meaning no dash light, without having to fit a resistor ?
I think you've also missed my point... That I'm not convinced you can disable emissions equipment in the ecu as that invalidates the euro4/5 ratings and is against the law.

As above the resistor is a trick to fool the software.

An alternative is to block the pipe by the airbox and leave the electronic equipment behind but unable to function. No noise, no resistor.

This technique has been covered multiple times also on the forums.

J
 

General Monty

2019
CB650R
Jun 5, 2021
Riding Since
1992
I’ve just reassembled my 2019 CB650R after pair system removal. I have the engine light on, guessing it because I didn’t fit a resistor on the solenoid plug. I need a 27 ohm 10 watt apparently, but can’t find one in the U.K with the pins on each side. Has anyone found one, Ive got nothing except a square one with no pins after a few hours of searching. Thanks
 

bishop

2014
CBR650F
Mar 17, 2018
I have the 2016 model and getting block off plates has been impossible so far thanks to shipping issues to my country. Now I have a home made setup instead of the blockoff plates. Works fine. Connected both sides of the area with one of the tubes from air valve induction system. Not sure if there is anything wrong in the setup.
The caps, I filled with JBweld, cheaper to fill then to buy blank plates.
 
Top Bottom