SX 600 W/can now Doggy

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prostock700

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I put what I believe is a Bender can on my 1999 sx600 with a stock single pipe and now it seems VERY un-responsive at start to 1/4 throttle or until it comes up on the pipe then it rips, But like I say the bottom end is very boggy, If you hit the choke just before you take off it is better. I can't believthe air screws are on the bottom of the carbs? the most stupid thing I have ever seen! Anyway the screws are at the stock setting and I am NOT tearing off the air box and carbs to adjust!(STUPID!) What about dropping the clips? will that help?stock gearing, ran fine before I put on the can.
Thanks... :o|
 
I believe a clutch kit may be in order. Some pipes/can require a clutch kit. This usually raises the engagement rpm so the engine can be in the pipe/can's power band upon engagement. P.S. the aibox slides out after removing two bolts.
 
You are too lean on the idle/pilot circuit. Gotta pull those carbs and open up the fuel screws 1/2 turn.
 
The box is really not that hard to remove. Once you do it a few times you get good at it.

Doing it on the trail is real fun.

Remember more air out more air in. You still need to keep the air/fuel ratio
the same and this is the cause of your bog. Start with one setting change only and work your way toward running right. There is a diagram of when what works on one of the tech pages. Start with the fuel screw and if it is more than 2 1/2 turns out then move on to a larger pilot and 2 turns out on the screws. Just don't change too much at once or you may end up with other issues.
 
hey guys in my manual for a 1994 vmax it says to lean the mixture turn airscrew out and to richen mixture turn in .is it differnt for this sled and carbs??page 2-31 of factory manual it says,slowly loosen pilot screws evenly.as the pilot screw is loosened,the mixture will become leaner.
 
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just asking j are they not 1 and the same?on my carbs as far as 1 know there are no pilot screws just air screw and on top of course the idle screw.like i said maybe they changed the carb design from 94?on the 94 the air screw is called the pilotscrew and in is rich and out is lean.im sorry if my earlier post mislead but ive allways called the pilot screw the airscrew out of old habit but i still stand by what the factory manual says and thats loosening leans and tighting richens.as a matter of fact on the same page they use the term air screw and pilot screw for the same setup description. page 2-31 of yamaha factory severse manual (1994)
 
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Courgar- I hope I didn't sound condensending.. The your right on the flat sides the pilot circuit is a fuel circuit and the old round slides I believe are air circuits. This is why they are backwards. You did not mislead anyone a bunch of people have been confused by the fuel / air mix up..

Sorry if I offended you definetly wasn't the intent. I was just rushing and trying to be direct and to the point.

Is your question answered?

cougar1985 said:
just asking j are they not 1 and the same?on my carbs as far as 1 know there are no pilot screws just air screw and on top of course the idle screw.like i said maybe they changed the carb design from 94?on the 94 the air screw is called the pilotscrew and in is rich and out is lean.im sorry if my earlier post mislead but ive allways called the pilot screw the airscrew out of old habit but i still stand by what the factory manual says and thats loosening leans and tighting richens.as a matter of fact on the same page they use the term air screw and pilot screw for the same setup description. page 2-31 of yamaha factory severse manual (1994)
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ok nuff said ,all i know is that if i turn the screw out it leans out the system,i guess it really doesnt matter in the big sceam of things weather your leaning out the air or gas really as ultimatly it leads to the same results ,right?so all is right with the world and i hope we get a storm soon as the weather the last few days is starting to kill the snow here.
 
Are we talking about your 99? Because you still got it backwards.. Out is richer in is leaner.. If you are talking about the sled in you avatar then you may be right.

The difference is if its a fuel screw and you back it out it lets more fuel in so that richer. If its an air screw when you open it up it lets more air in and leans it out.


I hear you guys might be in for a good storm this weekend.




cougar1985 said:
ok nuff said ,all i know is that if i turn the screw out it leans out the system,i guess it really doesnt matter in the big sceam of things weather your leaning out the air or gas really as ultimatly it leads to the same results ,right?so all is right with the world and i hope we get a storm soon as the weather the last few days is starting to kill the snow here.
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no the 94 and i know im right ,that was exactly what i was askiing earlier ,if maybe on the newer sleds it was different?because both of my older sleds ,the 94 with the flat sides and the 79 intruder with the rounds both lean out ,rich in.sorry for the confusion.on the 94 they call it a pilot screw and say out to lean!i really hope we do get a storm as right now its very mild but hopefully that will change.its good to of had this thread as if i get a newer yammy i will be very careful to read the book before doing any adjustments,though after going on a ride this weekend with a buddy and his new rs vector im thinking 4 stoke may be the way to go in the end.i see by the pic you enclose the screw your talking about is in a differnt place than mine ,mines on the right side of each carb.so i would say were both right ,just talking differnt years i really didnt know they changed that much in just a few,but hey it keeps us on our toes,lol.
 
We are both dead on.. I was getting confused because I thought you were the guy that initially posted the question "Bender can on my 1999 sx600 ".. Your definetly right on the old round slides. Hopefully we don't havet totally prostock700 confused now!




cougar1985 said:
no the 94 and i know im right ,that was exactly what i was askiing earlier ,if maybe on the newer sleds it was different?because both of my older sleds ,the 94 with the flat sides and the 79 intruder with the rounds both lean out ,rich in.sorry for the confusion.on the 94 they call it a pilot screw and say out to lean!i really hope we do get a storm as right now its very mild but hopefully that will change.its good to of had this thread as if i get a newer yammy i will be very careful to read the book before doing any adjustments,though after going on a ride this weekend with a buddy and his new rs vector im thinking 4 stoke may be the way to go in the end.i see by the pic you enclose the screw your talking about is in a differnt place than mine ,mines on the right side of each carb.so i would say were both right ,just talking differnt years i really didnt know they changed that much in just a few,but hey it keeps us on our toes,lol.
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well youd think theyd keep things the same .my 94 flat sides adjust differnt than newer ones ,if your not carefull youd really get in trouble.i hope i didnt cause the orginal poster confusion,listen to the other guys,guy i thought all carbs would follow the same prinicipales but i was in error,sorry for any confusion.
 
Generally speaking, if the pilot adjustment screw is on the airbox side of the slide (round or flat), it will adjust AIR (i.e. in rich, out lean). If it's on the motor side of the slide (round or flat) it will adjust fuel (i.e. in lean, out rich).

I was reallly confused about this a few years back when I owned two Indy Trails and an 87 Exciter. The Indy's had AIR screws and the Exciter a FUEL screw. Someone at SLP explained the logic I shared above and it has been invaluable!! Hope this helps.

Excitefan
 
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