mfrancis84
New member
I finally got to starting up my 97 SX 700 for the year. Initially I have always had a hard time getting it started the first time of the year. My 1998 SRX I just put a little gas in each cylinder and generally it is running the first or second time doing that. My SX on the other hand did not start after doing it multiple times. I called my local Yamaha dealer and they suggested taking off the air intake foam and holding something over the air inlet. I did that and it started the FIRST TIME!!
Anyway, I got it running and it sat and idled like a champ. I did not run the sled but 50 or so miles last year and when I did I was having issues with it where it idled fine and at full throttle it run good as well. But at the end of the ride it was bogging when slowing down and even backfired a couple of times as well. It looked to me that the low idle jet may have been dirty yet. I brought it into my local dealer for a pre-season checkup for the 2005 - 2006 season that included a carb cleaning. but since it sat and only was run 200 - 300 miles in the past few years, I am thinking it sucked in some more junk into the carbs.
So now that I got it running for this year it is doing the same thing. Idles good and revs up good too, but as soon as I am bringing it down in RPM and giving it a little gas while doing so it bogged and backfired.
So does this sound to be just a need for another carb cleaning? Or is there something else I need to check? Sounds to me that when it does this two of the cylinders are firing and one is not.
Since the weather just turned our snow to water puddles and mud I may for the first time try to clean them myself since it will be a while until the next snow. I never cleaned carbs myself on either my SX or SRX sleds. Any tips on doing that? Or am I best to just take it in to the dealer to have it done?
Thanks for any insight and help.
Anyway, I got it running and it sat and idled like a champ. I did not run the sled but 50 or so miles last year and when I did I was having issues with it where it idled fine and at full throttle it run good as well. But at the end of the ride it was bogging when slowing down and even backfired a couple of times as well. It looked to me that the low idle jet may have been dirty yet. I brought it into my local dealer for a pre-season checkup for the 2005 - 2006 season that included a carb cleaning. but since it sat and only was run 200 - 300 miles in the past few years, I am thinking it sucked in some more junk into the carbs.
So now that I got it running for this year it is doing the same thing. Idles good and revs up good too, but as soon as I am bringing it down in RPM and giving it a little gas while doing so it bogged and backfired.
So does this sound to be just a need for another carb cleaning? Or is there something else I need to check? Sounds to me that when it does this two of the cylinders are firing and one is not.
Since the weather just turned our snow to water puddles and mud I may for the first time try to clean them myself since it will be a while until the next snow. I never cleaned carbs myself on either my SX or SRX sleds. Any tips on doing that? Or am I best to just take it in to the dealer to have it done?
Thanks for any insight and help.
try this link
Real easy, follow mrviper instructions & you'll be alright...cheers
http://www.totallyamaha.net/forums/showthread.php?t=43118
Real easy, follow mrviper instructions & you'll be alright...cheers
http://www.totallyamaha.net/forums/showthread.php?t=43118
mfrancis84
New member
Thanks for the link theblues! Exactly what I was hoping for and more!
I did a search and did not find that post.
So does my issue sound to be just in need of another good carb cleaning!
Thanks again!
I did a search and did not find that post.
So does my issue sound to be just in need of another good carb cleaning!
Thanks again!
daman
New member
Clean your carbs good,blow all jets/passages out with shop air, when held
up to a light should be able to see through the jets, make sure on this for
your pilots being they have such small holes.
check everything out for spec, float height/pilot screw's/needles etc,etc...
take your time..
up to a light should be able to see through the jets, make sure on this for
your pilots being they have such small holes.
check everything out for spec, float height/pilot screw's/needles etc,etc...
take your time..
mfrancis84
New member
Thanks. I will be sure to take time doing it since I have never had to do this. I have had an Exciter, a Vmax 600, VMAX 4, and now the 97 SX and 98 SRX and this is the first time I have ever had issue with one running bad.
So one issue in 18-19 years is amazing.
Thanks for the input and tips! Hopefully by Sunday it will be all done...
So one issue in 18-19 years is amazing.
Thanks for the input and tips! Hopefully by Sunday it will be all done...
daman
New member
Keep us posted, oh and 
to the site. 
to the site. tedgoesfast
New member
clean carbs also my sx 700 did this it was the throttle switch i unhooked it and jumped it worked perfect
mfrancis84
New member
Here is an update of my first carb cleaning.
When I took the carbs out of the SX I was amazed to find what I did.
From the last time I took it into the snowmobile shop to get the carbs cleaned as part of a pre-season checkup, they neglected to:
1) bolt the air box in the back to keep it in a firm position. I found the bolt under the airbox. I am guessing they decided to not re-pull the airbox out when they dropped it and just left it
2) the clamps that go over the fuel lines on the carbs were not put back
3) and the BIG ONE, they did not tighten one of the rubber boots from the airbox to the carb. In this case it was the center carb. Thus on the carb side where the rubber boot was not tight, I am sure it had to be gulping in alot of extra air.
I took out the carbs and cleaned them all. The outside ones looked to be nice and clean to start with but cleaned them anyway. I then did the center one and boy was that one dirty. The bowl was just full of tarnished with a lot of junk down in the bottom. So that one needed some real good cleaning. So I am guessing it got that way from sucking in all the crappy dirty air with the loose boot.
I put it all back together and 4 pulls later it was running. It sounded good and I let it run for a little. I took it for a ride down the road some and it still had a bog to it. I got back to the house and figured that I would change the pugs again even though I changed them when I first started it last week. Well that did the trick. Looks to be running like a champ now. Just had to adjust the throttle cable a little and now it is all set.
The Yamaha shop I took it to just changed hands this summer. I guess that I am now glad it did seeing the bad job they did cleaning the carbs when I took it in last.
Now that I have successfully cleaned the carbs myself, I will be doing that from now on.
The instructions I was given above were awesome. Made the job quite easy. I took my time and after about 3 hours (with a couple breaks) it was all done.
Thanks again for the help on finding the instructions.
Now all I need is some snow to give it a good test!
Thanks again everyone!
When I took the carbs out of the SX I was amazed to find what I did.
From the last time I took it into the snowmobile shop to get the carbs cleaned as part of a pre-season checkup, they neglected to:
1) bolt the air box in the back to keep it in a firm position. I found the bolt under the airbox. I am guessing they decided to not re-pull the airbox out when they dropped it and just left it
2) the clamps that go over the fuel lines on the carbs were not put back
3) and the BIG ONE, they did not tighten one of the rubber boots from the airbox to the carb. In this case it was the center carb. Thus on the carb side where the rubber boot was not tight, I am sure it had to be gulping in alot of extra air.
I took out the carbs and cleaned them all. The outside ones looked to be nice and clean to start with but cleaned them anyway. I then did the center one and boy was that one dirty. The bowl was just full of tarnished with a lot of junk down in the bottom. So that one needed some real good cleaning. So I am guessing it got that way from sucking in all the crappy dirty air with the loose boot.
I put it all back together and 4 pulls later it was running. It sounded good and I let it run for a little. I took it for a ride down the road some and it still had a bog to it. I got back to the house and figured that I would change the pugs again even though I changed them when I first started it last week. Well that did the trick. Looks to be running like a champ now. Just had to adjust the throttle cable a little and now it is all set.
The Yamaha shop I took it to just changed hands this summer. I guess that I am now glad it did seeing the bad job they did cleaning the carbs when I took it in last.
Now that I have successfully cleaned the carbs myself, I will be doing that from now on.
The instructions I was given above were awesome. Made the job quite easy. I took my time and after about 3 hours (with a couple breaks) it was all done.
Thanks again for the help on finding the instructions.
Now all I need is some snow to give it a good test!
Thanks again everyone!
daman
New member
good to hear, thats why you gota do it your self if you want it done right,you could have burnt her down with that boot loose, dumb ***'s, i'd call 'em back and tell 'em.. 
neal
New member
so what procedure do we follow if we cant get the float bowls off? this year i had that problem atleast one screw on each carb was oxidized to the threads.
