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Old 12-09-2012, 12:53 PM   #1 (permalink)
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1999 vmax 600

stared sled it pops and runs funky have to choke it to keep it running
things done new gas good comprestion plugs good have spark
any idias
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Old 12-09-2012, 12:53 PM   #2 (permalink)
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how are the carbs?
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Old 12-09-2012, 12:56 PM   #3 (permalink)
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cleaned them they were dirty have not run sled i three years
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Old 12-09-2012, 01:06 PM   #4 (permalink)
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So, is it running right now?
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Old 12-09-2012, 01:21 PM   #5 (permalink)
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no what could it be any idas
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Old 12-09-2012, 01:29 PM   #6 (permalink)
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When you cleaned them, did you floss the pilot jets?
Having to keep the choke on points to plugged pilot jets.

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w/ Comet 108 Pro-4 clutch & 01 ZR skid

'90 Wildcat Project in progress.

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1980 Indy Trail 440 (for sale)
1980 AC Pantera (donor engine to the 90 wildcat)


http://www.dcdrifters.net/


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Old 12-09-2012, 03:24 PM   #7 (permalink)
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yes flost them all it starts and ideles good when i hit the thodel i have to choke or it dies and back fires
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Old 12-09-2012, 03:27 PM   #8 (permalink)
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allmost like cilender arent firing the way sould
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Old 12-09-2012, 03:31 PM   #9 (permalink)
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yes flost them all it starts and ideles good when i hit the thodel i have to choke or it dies and back fires
You say it idles fine but it bogs at throttle increase. Have checked your main jets for a clog? Does your sled have T.O.R.S? If so, I would check to see if it is working properly.
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Old 12-09-2012, 03:35 PM   #10 (permalink)
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You say it idles fine but it bogs at throttle increase. Have checked your main jets for a clog? Does your sled have T.O.R.S? If so, I would check to see if it is working properly.
what is t.o.r.s
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Old 12-09-2012, 03:44 PM   #11 (permalink)
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what is t.o.r.s
T.O.R.S. is the throttle over ride system. I believe that your year of Yammi will have it. Check to see if you have wires going to the side of your carbs. If you do, than your have this system. It is supposed to lower the rpms below clutch engagement in the event that one of the carbs sticks open or if the throttle lever is released and the carbs stay open. If they are not functioning properly, this may lead to your inability to rev the engine. If you go to the yamaha forum and look at the "sticky" threads, I believe there is atutorial on how to test the system and another one showing you how to bypass the system. I hope this is helpful. And if all else fails, ask "Yamadad" for some help. He is a HUGE wealth of Yamaha knowledge.
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'89 A/C Eltgre' EXT 530 (My Sled... Now sold )
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Old 12-09-2012, 04:07 PM   #12 (permalink)
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T.O.R.S. is the throttle over ride system. I believe that your year of Yammi will have it. Check to see if you have wires going to the side of your carbs. If you do, than your have this system. It is supposed to lower the rpms below clutch engagement in the event that one of the carbs sticks open or if the throttle lever is released and the carbs stay open. If they are not functioning properly, this may lead to your inability to rev the engine. If you go to the yamaha forum and look at the "sticky" threads, I believe there is atutorial on how to test the system and another one showing you how to bypass the system. I hope this is helpful. And if all else fails, ask "Yamadad" for some help. He is a HUGE wealth of Yamaha knowledge.
thank you i think thats what its doing
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Old 12-09-2012, 04:28 PM   #13 (permalink)
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can i elimenate t.o.r.s if so how
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Old 12-09-2012, 05:01 PM   #14 (permalink)
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can i elimenate t.o.r.s if so how
Yes it can be done. You can search it on youtube and I do believe that there is a "how to" video in the "sticky" threads on the top of the Yamaha forum. Good luck, that tors can be a real pain in the A$$!
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'89 A/C Eltgre' EXT 530 (My Sled... Now sold )
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Old 12-09-2012, 05:11 PM   #15 (permalink)
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Yes it can be done. You can search it on youtube and I do believe that there is a "how to" video in the "sticky" threads on the top of the Yamaha forum. Good luck, that tors can be a real pain in the A$$!
Here is the link to the youtube tutorial
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'98 Arctic Cat Pantera 580 EFI Touring (AKA.. The Recliner)
'98 Polaris Indy 500 (Sold.... and missed!!)
'87 Yamaha Bravo (Now in KCCats Family)
'78 Polaris TXL-340 (Always in progress)
'89 A/C Eltgre' EXT 530 (My Sled... Now sold )
'73 A/C Cheetah 440 (Now w/ my Nephew)
'90 A/C Prowler w/ '96 580 skid (My oldest boys ride)

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Old 12-09-2012, 06:44 PM   #16 (permalink)
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you may need to redescribe your issue. flipping the choke lever if the tors is activating wont change the tors. based on your description, you have other problems, like the carbs werent thoroughly cleaned.

worth the effort to simply unplug the wires from the carbs and plug the harness side wires into themselves(carb side doesnt care) just to rule it out. its quick and free.

from there, some better info should lead to a better diagnosis. using the choke to keep it running usually indicates dirty carbs.
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Old 12-09-2012, 07:05 PM   #17 (permalink)
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Originally Posted by yamadad4 View Post
you may need to redescribe your issue. flipping the choke lever if the tors is activating wont change the tors. based on your description, you have other problems, like the carbs werent thoroughly cleaned.

worth the effort to simply unplug the wires from the carbs and plug the harness side wires into themselves(carb side doesnt care) just to rule it out. its quick and free.

from there, some better info should lead to a better diagnosis. using the choke to keep it running usually indicates dirty carbs.
Sorry guys, I guess i glassed over the choke comment. I would defer to Yamadad4 as he is probably correct in that the carbs are probably still dirty.
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'98 Arctic Cat Pantera 580 EFI Touring (AKA.. The Recliner)
'98 Polaris Indy 500 (Sold.... and missed!!)
'87 Yamaha Bravo (Now in KCCats Family)
'78 Polaris TXL-340 (Always in progress)
'89 A/C Eltgre' EXT 530 (My Sled... Now sold )
'73 A/C Cheetah 440 (Now w/ my Nephew)
'90 A/C Prowler w/ '96 580 skid (My oldest boys ride)

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Old 12-09-2012, 09:38 PM   #18 (permalink)
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good news got the sled running good not sure if i got the t.o.r.s to reset or
blow out what ever was in the carb
heres the whole stoy on the sled it not mine its my buddys three years ago
he blow the left rings exsaust side 3/16 gouge in the jug above the exsaust
port we put in new jug and up dated pistons and rings 200 miles later it
did the same thing sled sat for 3 seasons i found him a engine from a 1998
when taking out the 1997 engine i found the both bolts were broke
on the moter mount on front primarey side so now that every thing is together right do you think the bolts that where broke could have something to do with the the motor blowing sorry i cant spell lol

ps. as for me i ride polaris now
not that i dont like yamaha 17 year of working on them more than riding them changed me over
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