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Yamaha ybr 125 idle ajustment.

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pmidd
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PostPosted: 21:17 - 21 Mar 2013    Post subject: Yamaha ybr 125 idle ajustment. Reply with quote

Hi, Got myself a 2011 Yamaha ybr 125 and this cold weather is playing havoc with my tick over, i'm having to keep the choke on for quite a while and then even when it's warmed up the rev counter still shows under 1000 revs . How can i tweak this up a bit?
Many thanks in advance,
Paul.
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Mark65
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PostPosted: 21:26 - 21 Mar 2013    Post subject: Reply with quote

2011 choke??
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YBR Ric
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PostPosted: 21:26 - 21 Mar 2013    Post subject: Reply with quote

When you say a 2011 YBR, do you mean a 4 year old carb model which was eventually registered in 2011 and advertised as a 2011 model?

There was one such bike (in red) with a built in square headlamp fairing up for sale in a dealers recently.


Last edited by YBR Ric on 21:34 - 21 Mar 2013; edited 1 time in total
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pmidd
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PostPosted: 21:33 - 21 Mar 2013    Post subject: Reply with quote

Hi, it's a 2011 registered 61 plate 2 years old. No kick start!

Last edited by pmidd on 21:38 - 21 Mar 2013; edited 1 time in total
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YBR Ric
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PostPosted: 21:37 - 21 Mar 2013    Post subject: Reply with quote

Tickover adjustment will be by way of an anticlockwise twist of the small brass screw found on the right hand side of the injector body when engine is at normal working temperature. 1300-1500rpm is book recommendation for idle speed.
Try 1/2 turn first.
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pmidd
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PostPosted: 21:44 - 21 Mar 2013    Post subject: Reply with quote

Might sound a bit slack, but is that right hand side when sat on bike or facing the bike ? Very Happy
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Boris the spider
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PostPosted: 21:50 - 21 Mar 2013    Post subject: Reply with quote

YBR Ric wrote:
Tickover adjustment will be by way of an anticlockwise twist of the small brass screw found on the right hand side of the injector body when engine is at normal working temperature. 1300-1500rpm is book recommendation for idle speed.
Try 1/2 turn first.


Pic ?

Just for reference as i have an injected YBR for commuting.
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YBR Ric
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PostPosted: 21:51 - 21 Mar 2013    Post subject: Reply with quote

http://i162.photobucket.com/albums/t245/portisheadric/P1000346_zps85feee6a.gif


Right hand when sitting on the bike - spark plug side

Out of curiosity, what are you adjusting that you believe to be a choke?

If everything's working as it should the revs will increase automatically to compensate for a cold engine and return to normal once having reached normal operating temperature.


Last edited by YBR Ric on 22:05 - 21 Mar 2013; edited 1 time in total
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pmidd
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PostPosted: 21:53 - 21 Mar 2013    Post subject: Reply with quote

Will have a look tomorrow and take a picture.
Many Thanks again,
Paul.
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pmidd
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PostPosted: 21:55 - 21 Mar 2013    Post subject: Reply with quote

On the left hand side of the carb there is a leaver with a black rubber end that pushes up for on and down to turn off.
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Boris the spider
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PostPosted: 22:14 - 21 Mar 2013    Post subject: Reply with quote

pmidd wrote:
On the left hand side of the carb there is a leaver with a black rubber end that pushes up for on and down to turn off.


My 2008 YBR is injected and does not have a choke.
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Boris the spider
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PostPosted: 22:16 - 21 Mar 2013    Post subject: Reply with quote

YBR Ric.

Thanks for the pic. It's just for reference should i need it.

Mines runs just fine in the cold this year.
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Alpha-9
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PostPosted: 22:21 - 21 Mar 2013    Post subject: Reply with quote

Err, it's autochoke if it's 2011, otherwise something weird is going on with that bike

I didn't know you could set it's idle at all! Always baffled me
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pmidd
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PostPosted: 22:22 - 21 Mar 2013    Post subject: Reply with quote

Boris, if yours is 2008 what the hell have i been told to lift as the choke that increases the revs??
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YBR Ric
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PostPosted: 22:32 - 21 Mar 2013    Post subject: Reply with quote

Mines running fine but I had my first problem a few days ago - ran out of fuel after 350 miles - because of the cold it runs much richer for much longer- fortunately lowering the bike onto the footrest released 1/2 a liter or so of fuel from the dead zone in the tank and this allowed me to carry on to the petrol station where I purchased 13.5 liters of gogo juice at a cost of 19.01 !!!!
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YBR Ric
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PostPosted: 23:06 - 21 Mar 2013    Post subject: Reply with quote

Alpha-9 wrote:
....I didn't know you could set it's idle at all! Always baffled me


On the EFI YBR's this small brass screw affects the mixture.
Running a faster idle (1500rpm) gives a richer mixture and better performance.
Running a lower idle (1300rpm) weakens it and improves economy.
Run it too weak(slow) and you risk both electrical and mechanical damage.

The brass screw is the only thing you should ever touch to adjust the idle.
Under no circumstances should you ever be tempted to disturb the screw and lock nut (throttle stop) to alter the idle speed.
This is set at the factory, if you even think about touching it a ninja will be sent round to administer a suitable punishment Shocked
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pmidd
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PostPosted: 23:25 - 21 Mar 2013    Post subject: Reply with quote

what the hell have i been told to lift as the choke that increases the revs??
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pmidd
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PostPosted: 17:46 - 22 Mar 2013    Post subject: Reply with quote

Hi, Here is the photo of the choke, anyone recognize this ??

http://i46.tinypic.com/vhcfmh.jpg
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Alpha-9
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PostPosted: 18:06 - 22 Mar 2013    Post subject: Reply with quote

Been converted to carb? Shocked

i'd be checking my engine numbers as all ybrs are fuel injection past 2007 Laughing
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pmidd
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PostPosted: 18:16 - 22 Mar 2013    Post subject: Reply with quote

Starting to think i have bought a pig in a poke !
Where would i cross reference the engine number?
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Alpha-9
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PostPosted: 18:18 - 22 Mar 2013    Post subject: Reply with quote

pmidd wrote:
Starting to think i have bought a pig in a poke !
Where would i cross reference the engine number?

V5 by what is printed on the engine
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pmidd
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PostPosted: 18:30 - 22 Mar 2013    Post subject: Reply with quote

Hi,Vin/chassis/frame number match V5 ! Last 4 numbers are 2007 please tell me this is not the year of manufacture as it is registered 2011 on a 61 plate !!!
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Alpha-9
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PostPosted: 18:33 - 22 Mar 2013    Post subject: Reply with quote

pmidd wrote:
Hi,Vin/chassis/frame number match V5 ! Last 4 numbers are 2007 please tell me this is not the year of manufacture as it is registered 2011 on a 61 plate !!!


https://www.gov.uk/get-vehicle-information-from-dvla
"Vehicle enquiry"
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Boris the spider
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PostPosted: 18:42 - 22 Mar 2013    Post subject: Reply with quote

pmidd wrote:
Hi,Vin/chassis/frame number match V5 ! Last 4 numbers are 2007 please tell me this is not the year of manufacture as it is registered 2011 on a 61 plate !!!


It looks very much like it.
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pmidd
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PostPosted: 18:44 - 22 Mar 2013    Post subject: Reply with quote

Hi,Just checked and it was manufactured in 2007 and registered 2011 Sad So not a lot i can do about that !!!
So back to my original question, how do i adjust the idle/tick over ??

Thanks for your help !!

Paul.
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