number-1
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| posted on 10/2/19 at 06:51 PM |
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R1 5VY choke question
Can anyone tell me how the auto choke works on the 5VY? Is it via the ECU? I always thought it was via water temperature and there were no electrics
involved but after a chat with a mate im not too sure now?
Can anyone shed some light? Ive checked the parts microfiche but cant see anything to do with a physical choke?
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CosKev3
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| posted on 10/2/19 at 09:08 PM |
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Deffo a 5VY?
If so when you turn on the ignition the idle control valve(only carbs have a choke)You will see it do a self test 
It will be controlled by ECU using water temp as it's a injection engine
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adithorp
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| posted on 10/2/19 at 09:27 PM |
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5vy is injection not carbs so doesn't have a choke as such. Fast idle when cold is controlled by a waxstat on the side of the throttle bodies.
Should have 2 small coolant pipes attached to it.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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number-1
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| posted on 10/2/19 at 10:08 PM |
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Cheers for the replies chaps. Ive been searching google but cant find any images of the part nor anything in the service manual about it? Has anyone
got a link to the part?
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CosKev3
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| posted on 10/2/19 at 10:24 PM |
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https://goo.gl/images/6fgPir
I'm sure it's that unit on the bottom left of picture?
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number-1
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| posted on 10/2/19 at 11:00 PM |
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I don't think it is mate. The bottom left in that picture is exhaust side of the engine and I'm sure it should be the other side or the
top of the picture somewhere as no coolant pipes run exhaust side at the top end.
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CosKev3
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| posted on 10/2/19 at 11:51 PM |
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I'm not sure any coolant goes to it,if it's not a idle control motor what is it?
As it's connected to the throttle butterflys.
The coolant temp sensor will be in the pipework somewhere,on the first injection R1 engine it's in the thermostat housing
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number-1
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| posted on 11/2/19 at 06:28 AM |
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I’m pretty sure it’s the TPS?
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motorcycle_mayhem
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| posted on 11/2/19 at 09:12 AM |
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It's a waxstat, as has been mentioned, two small rubber water pipes to it. It operates a pushrod connected to orifices at the bottom of the
TB's. The ECU plays no part in things, other than to use the temperature signal for 'normal' mixture control.
It does seize, or had on one of the of engines in the past. Distilled water and a 50:50 glycol-inhibitor:water mixture pretty much essential in these
engines.
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CosKev3
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| posted on 11/2/19 at 09:53 AM |
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quote:
Originally posted by number-1
I’m pretty sure it’s the TPS?
Deffo not TPS,that's in the centre where cable attaches.
Looking at that part I thought it was is actually a secondary set of butterflies,which the ECU must control.
https://goo.gl/images/okHmFL
The waxstat is that small round silver thing with two pipes going to it in that pic
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adithorp
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| posted on 11/2/19 at 04:14 PM |
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Bottom left is the ECU controlled secondary throttle servo in that picture. Nothing to do with choke/cold start. Basically overrides the primary
throttles and stops it bogging down if you open throttle to fast.
The fast idle wax stat' is top centre with 2 piping connections.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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number-1
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| posted on 12/2/19 at 09:01 AM |
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Cheers lads I can see the part now. Does anyone know what section in the manual it is as I can’t find it? Or a part number?
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CosKev3
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| posted on 12/2/19 at 10:48 AM |
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Number 16 on that pic I would say 
https://www.fowlersparts.co.uk/parts/5499566/yzfr1-2006-yzf-r1---5vyf-europe-deep-purplish-blue-metallic-c/intake-2
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number-1
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| posted on 13/2/19 at 01:42 PM |
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Ahhhh perfect. So the waxstat expands and contracts with the heat of the coolant and in turn pushes or pulls a lever to add more fuel!
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MikeRJ
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| posted on 13/2/19 at 05:21 PM |
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quote:
Originally posted by number-1
Ahhhh perfect. So the waxstat expands and contracts with the heat of the coolant and in turn pushes or pulls a lever to add more fuel!
It adds more air, it's the ECUs job to add the extra fuel to go with it.
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number-1
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| posted on 15/2/19 at 04:15 PM |
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Everyday is a learning day! Thanks for the replies lads. As always you have won me a debate with my mate 
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