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SIKMIC
Moderator
Joined: 29 Jun 2006
Posts: 1112
Location: Moranbah Qld
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 Posted: Tue Jan 20, 2009 9:00 pm Post subject: Need help QUICK!!! 05 YFZ |
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My 05 YFZ cant hold constant revs. If you give the throttle a hit it revs out and goes back to idle as it should. If I go to 1/4 or half throttle and hold it, it gets up to revs then the engine shutsdown.
The carby is clean.
Spark plug is fine.
So we are all out of ideas.
It just started having this problem in the last race on Sunday and I am meant to be racing again this weekend. 
Any help would be great.
Thanks 
_________________
Mic
YFZ450
Thanks to ATV's Unlimited &
Luke Beechey Motorsports
mic902@hotmail.com |
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Dingo555
Roostin Away
Joined: 25 Sep 2007
Posts: 778
Location: Closer to the Qld coast
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| Posted: Tue Jan 20, 2009 9:03 pm Post subject: |
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Buy a Suzuki, that should solve your problem 
_________________
10 LTR 555 Dingo
06 LTR 94 Kay
Thanks for all the support and good advice
ATVPRO
Colac Motorcylces
Luke Beechey Motorsports
Proud supporter of Team Ironpot
No skills or good habits, just point it and stab it..!! |
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BARN-6
Roostin Away
Joined: 12 May 2006
Posts: 684
Location: Upside down in the tyre wall
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| Posted: Tue Jan 20, 2009 9:08 pm Post subject: |
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| second the motion |
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SIKMIC
Moderator
Joined: 29 Jun 2006
Posts: 1112
Location: Moranbah Qld
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| Posted: Tue Jan 20, 2009 9:12 pm Post subject: |
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OK.... Does anyone have a race ready Suzi that will last me at least 4 months of riding/racing... If it doesn't I get my money back... Deal???  
But seriously. I need help if I am going to race at Emerald this weekend. 
_________________
Mic
YFZ450
Thanks to ATV's Unlimited &
Luke Beechey Motorsports
mic902@hotmail.com |
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450yam2
Blaster class
Joined: 06 Jul 2007
Posts: 161
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| Posted: Tue Jan 20, 2009 9:31 pm Post subject: |
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| Blocked breather on your fuel cap |
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SIKMIC
Moderator
Joined: 29 Jun 2006
Posts: 1112
Location: Moranbah Qld
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| Posted: Tue Jan 20, 2009 9:44 pm Post subject: |
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Fuel was flowing out the tap when I got fuel out to clean the Carby with.
_________________
Mic
YFZ450
Thanks to ATV's Unlimited &
Luke Beechey Motorsports
mic902@hotmail.com |
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t&l performance
The Day Starts With OZATV !
Joined: 07 Sep 2008
Posts: 1131
Location: perth
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| Posted: Tue Jan 20, 2009 10:07 pm Post subject: |
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| check inlet manifold for leaks if it has a hairline split it will be good for a quick rev but being held at a certain rev it will build vacume and suck air and shut down depending the size of the split wen it goes to shut down dosnt it stunble a bit 1st if it does listen to it if its a lazy sounding its fuel if its a sharp stumble its electrical good luck |
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noodles
Big Bore, Stroked & Bling +
Joined: 31 Mar 2006
Posts: 331
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| Posted: Tue Jan 20, 2009 10:42 pm Post subject: |
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check the battery , have seen symptoms like that a couple of times now and new battery fixed it.
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say NO! to ball sports |
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PeteW
Moderator
Joined: 09 Feb 2006
Posts: 1877
Location: Doreen, Vic
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| Posted: Wed Jan 21, 2009 9:02 am Post subject: |
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1 - try pulling the breather off the fuel cap while its running, fuel will trickle down OK when its not running but not enough if its under load.
2 - Check all the electrical connections, not likely to be the cause but worth a look, as noodles said maybe try a new battery (or a spare from another bike) also worth trying another Plug Cap/Coil pack as that can sometimes cause similar symptoms on the yams.
when you say it shuts down, does it stop completely or will it still idle?
does it rev clean all the way up or is it starting to break up before it gets there. It does sound mostly to me like a fueling problem ATM
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www.thumbpump.com
www.dirtcomp.com.au |
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SIKMIC
Moderator
Joined: 29 Jun 2006
Posts: 1112
Location: Moranbah Qld
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| Posted: Wed Jan 21, 2009 2:10 pm Post subject: |
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Thanks everyone.
I think we got it sorted...
The T.O.R.S, if that is what it is called on the YFZ's was playing up.
Should have it sorted out.
_________________
Mic
YFZ450
Thanks to ATV's Unlimited &
Luke Beechey Motorsports
mic902@hotmail.com |
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PeteW
Moderator
Joined: 09 Feb 2006
Posts: 1877
Location: Doreen, Vic
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| Posted: Wed Jan 21, 2009 3:01 pm Post subject: |
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| SIKMIC wrote: | Thanks everyone.
I think we got it sorted...
The T.O.R.S, if that is what it is called on the YFZ's was playing up.
Should have it sorted out. |
ahh.. that'll do it every time. 
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www.thumbpump.com
www.dirtcomp.com.au |
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SIKMIC
Moderator
Joined: 29 Jun 2006
Posts: 1112
Location: Moranbah Qld
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| Posted: Thu Jan 22, 2009 7:03 am Post subject: |
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What do I have to do to disable this? Can I just unplug it or do I have to join wires or anything?
_________________
Mic
YFZ450
Thanks to ATV's Unlimited &
Luke Beechey Motorsports
mic902@hotmail.com |
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When I Grow Up......
50cc nipper
Joined: 31 Dec 2008
Posts: 14
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| Posted: Fri Jan 23, 2009 11:42 pm Post subject: SIKMIKS SIK 05 YFZ |
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Probably a bit late to help now but was just reading on YFZ Central site about riding with lights on on 04 and 05 model YFZs. Apparently on these models the stator overcharges the battery due to there being not enough resistance . The symptoms are the same as you described with the battery not able to supply enough voltage to the CDI due to the battery burning out. Riding with the lights on adds resistance and stops the overcharging. A resistor kit is also available but I don't know where you would find one in OZ. They also said there is a small bullet connector under the seat bracket that can come loose. Check it out on YFZ Central and do a search for headlights. I would post the link but don't know how. If it all turns out to be a load of s..t don't shoot me cos I'm only the messenger. Hope it helps and any other members know anything about this I would be keen to hear. Just had a look at an 05 service manual I have and if the T.O.R.S. was faulty the quad wouldn't run at all. Feel free to PM Me if you need to know more from the manual.
P.S. Mr Moderator if I have posted this in the wrong forum I plead not guilty. Ignorance made me do it. |
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